Accessory device for an urinary catheter

Abstract

An accessory device for observing a flow of liquid exiting a catheter having a proximal end for insertion into a urethra and an opposite distal end is disclosed. The accessory device includes a handle having an attachment means for releasably coupling a catheter to the handle and a first camera for capturing a first plurality of images. The first camera is arranged with a field of view of the proximity of the distal end of the catheter when the catheter is coupled to the handle. The accessory device further includes a monitor in communication with the first camera, the monitor having a display configured to display the first plurality of images. The accessory device provides for visualizing urine exiting a catheter coupled to the accessory device.

Description

[0001] ACCESSORY DEVICE FOR A CATHETER

[0002] The present disclosure relates to an accessory device for assisting observation of a liquid flow exiting a catheter and a catheter system comprising such an accessory device and a catheter.

[0003] Brief description of the drawings

[0004] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated into and a part of this specification. The drawings illustrate embodiments and together with the description serve to explain principles of embodiments. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.

[0005] Fig. 1 illustrates a schematic view of an accessory device according to an embodiment of the invention,

[0006] Fig. 2 illustrates a perspective view of an accessory device according to an embodiment of the invention,

[0007] Fig. 3 illustrates a method of using an accessory device according to an embodiment of the invention,

[0008] Fig. 4 illustrates a schematic view of an accessory device according to an embodiment of the invention, and

[0009] Fig. 5 illustrates a schematic view of an accessory device according to an embodiment of the invention.

[0010] Detailed description

[0011] Various exemplary embodiments and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the embodiments. They are not intended as an exhaustive description of the invention or as a limitation on the scope of the invention. In addition, an illustrated embodiment needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular embodiment is not necessarily limited to that embodiment and can be practiced in any other embodiments even if not so illustrated, or if not so explicitly described. The present disclosure relates to an accessory device for assisting emptying or draining of the bladder and / or insertion of a catheter. In particular, the accessory device is suitable for use with intermittent urinary catheters where an increased focus is on avoiding urinary tract infections (UTIs). Therefore, a need exists to enable easy insertion of a catheter without contaminating the catheter during the catheterization procedure. Furthermore, a need exists for knowing when the bladder has been drained completely and the intermittent catheter can be pulled out of the urethra again, thereby preventing using a catheter too often which may increase the risk of infection.

[0012] Urinary catheter assemblies for draining the bladder are increasingly used for intermittent as well as indwelling or permanent catheterization. Typically, urinary catheters are used by patients suffering from urinary incontinence or by disabled individuals like paraplegics or tetraplegics, who may have no control permitting voluntary urination and for whom catheterization may be the way of urinating.

[0013] Urinary catheters are divided into two major groups of catheters, indwelling catheters and intermittent catheters. Indwelling catheters are typically inserted into the urethra and the bladder by medical personal (i.e. a trained professional, typically a nurse or physician) and have means for retaining the catheter inside the bladder for up to two weeks or more. Indwelling catheters are soft and flexible since they have to remain in the urethra for weeks. Indwelling catheters empty the bladder continuously.

[0014] Intermittent catheters are typically inserted by the user him- or herself and sits only in the urethra and bladder for as long as it takes to empty the bladder - e.g., for about 5-10 minutes. Intermittent catheters are used every 4-6 hours to empty the bladder corresponding roughly to the interval that people having no urinary problems will usually go to the bathroom. Intermittent catheters are typically more rigid than indwelling catheters since they have to be inserted by the user him / herself and since they do not need to sit in the urethra for days or weeks. An important feature for the intermittent catheter is to ease the insertion into the urethra. This is done by providing the intermittent catheter with a low frictious surface. Non-limiting examples of such are hydrophilic coated catheters which are subsequently wetted by a swelling media in order to produce a low friction surface, or oil or water-based gel which is applied to the catheter before insertion into the urethra.

[0015] Intermittent urinary catheters may be provided with a hydrophilic coating that needs to be wetted prior to use and thereby absorbs a considerable amount of liquid. Such a hydrophilic coating will provide a very lubricious surface that has very low friction when the catheter is to be inserted. Hydrophilic coated catheters, where the coating absorbs a considerable amount of liquid for a low frictious surface (swelling degree >100%), will not be suitable for indwelling catheters, because the hydrophilic surface coating would stick inside the mucosa of the urethra if left inside the body for a longer period, due to the hydrophilic coating transforming from being highly lubricious when fully wetted to being adhesive when the hydration level of the coating is reduced.

[0016] The accessory device as disclosed herein is particularly suitable for use with intermittent catheters to be inserted by the user him- or herself.

[0017] In the following, whenever referring to a proximal end of an element, the referral is to the end adapted for insertion. Whenever referring to the distal end of an element, the referral is to the end opposite the insertion end. In other words, the proximal end is the end closest to the user, when the catheter is to be inserted and the distal end is the opposite end - the end furthest away from the user when the catheter is to be inserted.

[0018] The longitudinal direction is the direction from the distal to the proximal end. The transverse direction is the direction perpendicular to the longitudinal direction, which corresponds to the direction across the shaft of the catheter.

[0019] In the following, whenever referring to a device being "releasably couplable" to another device, it should be understood that the devices may be temporarily attached in such a way that the risk of unintentionally separating them is minimal. However, the devices should be attached in such a way that they may be separated if desired.

[0020] A catheter, in particular an intermittent urinary catheter, suitable for use with an accessory device according to embodiments disclosed herein includes a main tubular part extending from the distal end to the proximal end. The tubular portion can be cylindrical or conical. In embodiments, the tubular portion has an oval cross-section. The tubular portion is configured for providing urine flow through the intermittent catheter from a drainage portion to the distal end. A closed tip portion with a closed tip is positioned in the proximal end of the catheter and is provided as a rounded closed end of the tube constituting the main tubular portion of the catheter. The drainage portion of the tubular portion will typically be in the proximal portion of the tubular portion. In embodiments, the drainage portion includes multiple drainage openings providing for flow of urine between the outside of the catheter and an inside lumen of the tubular portion. The catheter may include a connector in the distal end and may in an embodiment include a flared end of the catheter so that the diameter of the connector increases with respect to the tubular part. The connector may function as a handle allowing the user to manipulate the catheter, and / or the catheter may include a handle in the distal end, which has a length allowing the user to manipulate the catheter. The catheter includes an insertable portion proximal to the connector and / or handle, the insertable portion extending from the tip in the proximal end to the connector.

[0021] Usually, catheters used as urinary draining devices are from size 8 FR to size 18 FR. FR (or French size or Charriere (Ch)) is a standard gauge for catheters approximately corresponding to the outer circumference in mm. More accurately, the outer diameter of the catheter in mm corresponds to FR divided by 3. Thus 8 FR corresponds to a catheter with an outer diameter of 2.7 mm and 18 FR corresponds to a catheter with an outer diameter of 6 mm. Catheters for use with an accessory device of the present disclosure may prior to use be provided with a hydrophilic coating so as to impart a low-friction insertion.

[0022] Catheters particularly suitable for use with an accessory device according to the present disclosure may be female intermittent urinary catheters comprising an insertable portion having a length between 55 mm and 200 mm. For example, a category of female intermittent urinary catheters may be compact catheters having an insertable portion having a length between 55 mm and 80 mm, another category may be straight catheters having an insertable portion having a length between 140 and 200 mm, and an intermediate category may be catheters having an insertable portion having a length between 80 mm and 140 mm.

[0023] Whereas the above discussion relates to urinary catheters, and in particular intermittent urinary catheters, it is envisioned that the accessory devices as described herein may be used with other types of catheters as well, in particular catheters to be inserted by the user him- or herself, such as anal catheters for use with bowel irrigation systems, or wherever a catheter may need to be inserted, in particular wherever the meatus is difficult to identify for different reasons.

[0024] The use of the word "substantially" as a qualifier to certain features or effects in this disclosure is intended to simply mean that any deviations are within tolerances that would normally be expected by the skilled person in the relevant field.

[0025] The field of view of a camera is the extent of the observable world that the camera can capture at any given moment. The field of view may be measured in degrees.

[0026] The present disclosure provides an accessory device for assisting observation of a liquid flow exiting a catheter and a catheter system for assisting observation of a liquid flow exiting a catheter. Whereas "liquid" is predominantly used in the present disclosure, it is appreciated that for the use case of a urinary catheter, the liquid will be urine from the bladder. By liquid exiting a catheter is meant the liquid that has entered the lumen of the catheter in a proximal end via openings therein and flowed through the lumen. Thus, the liquid exit the catheter via an opening in the distal end of the catheter, the opening being in communication with the lumen.

[0027] In a first aspect, an accessory device for observing a flow of liquid exiting a catheter is disclosed. The catheter has a proximal end for insertion into a urethra and an opposite distal end. The accessory device includes a handle comprising an attachment means for releasably coupling a catheter to the handle and for fixating the distal end of the catheter relative to the handle. The accessory device further includes a first camera for capturing a first plurality of images. The first camera is arranged with a field of view of the proximity of the distal end of the catheter when the catheter is coupled to the handle. Thereby, liquid exiting the catheter (when in use) may be included in the first plurality of images. The accessory device further includes a monitor in communication with the first camera, the monitor comprising a display configured to display the first plurality of images.

[0028] It is appreciated that the ability for liquid exiting the catheter to be included in the first plurality of images is an effect of the first camera being arranged with a field of view of the proximity of the distal end of the catheter (when a catheter is coupled to the handle). Namely, this effect occurs only when the accessory device and a catheter are coupled, and further, when the catheter is inserted. However, for the purpose of establishing the orientation of the first camera, it may be beneficial to include the effect.

[0029] When a user of a catheter is performing a catheterization / voiding, the user commonly uses sound (e.g., from the impact of the urine flow with water in the toilet pan) as an indicator for flow. In other words, the user commonly stops the catheterization once sound subsides. However, this method is flawed for several reasons including the obvious uncertainty arising from positioning the distal end of the catheter "correctly" in the pan, but also due to different designs of toilet pans (e.g., affecting the amount of water in the pan), and for hearing impaired users unable to use sound as an indicator. Furthermore, for different reasons, immediate visual access to the pan may be difficult. If a user is not emptying their bladder completely or sufficiently, risk of infections or complications arise. Accordingly, it is important to obtain complete emptying of the bladder each time.

[0030] The present accessory device provides a camera arranged to provide visual access of at least the proximity of the distal end of the catheter, such as during catheterization. The camera may also be arranged to provide visual access to the pan of a toilet, so as to assess whether liquid enters the pan. Thereby, on the display of the monitor, the user is able to observe the emptying of the bladder in real time, and thus use visual access via the camera to observe the process. Furthermore, since catheterization commonly includes repositioning the catheter by small movements in the urethra (e.g., inserting or retracting the catheter by a few millimeters) to ensure complete emptying of the bladder, the user may optimize the voiding as he / she may immediately observe the effect of repositioning.

[0031] Embodiments provide an accessory device having a handle configured to receive a catheter, such that a catheter can be coupled / attached to the handle. In particular, an attachment means of the handle is configured to releasably couple a catheter to the handle. For example, the attachment means may receive a connector of the catheter. In embodiments, the first camera is substantially longitudinal (e.g., along an optical axis) and may have a diameter (e.g., of a lens of the first camera) of less than 15 mm, such as less than 10 mm, such as in the range from 3 mm to 8 mm, in order to provide a compact handle. The first camera may be any commercially available first camera suitable for the intended use. In embodiments, the first camera includes an image sensor, such as a CCD sensor or a CMOS sensor.

[0032] In a preferred embodiment, the first camera is configured to capture a first plurality of images, such as to form a video. In embodiments, the plurality of images is captured (by the first camera) and displayed (on the display) consecutively to form a video (e.g., with a frame rate of at least 20 FPS). Further, preferably, the video is transmitted / broadcasted to the display of the monitor, without delay, in order to provide a live video footage of the objects being within the field of view of the first camera. Thereby, the movements as caused by the user handling the handle are reflected in the images / video displayed in the display. Thereby, the user can control / manipulate the catheter by holding on to the handle and moving the handle in accordance with what he / she sees on the monitor. Thereby, the user may identify whether liquid flows through the catheter or not and how movements of the handle, and thus the catheter, affects the flow of liquid. Thereby, the user may know when the bladder is empty, and the catheter can be removed.

[0033] In embodiments, the monitor includes a housing having a front comprising the display, and a back. In embodiments, the housing is made in an (injection) moulding process or a 3D printing process. In embodiments, the monitor includes a power unit, such as a battery, for powering the display. In embodiments, the first camera is powered by the power unit of the monitor. In embodiments, the handle includes a power unit, such as a battery, for powering the first camera. In embodiments, the monitor includes a processor for processing the images as captured by the first camera and for displaying the images on the display. In embodiment, the monitor includes a memory, such as a volatile memory, such as random-access memory (RAM). In embodiments, the monitor includes a power button for turning on the monitor (and display thereof) and / or the first camera. In embodiments, the power button turns on the monitor and the first camera, such that the accessory device is ready for use in a single action. In embodiments, the monitor and / or handle includes a charging port connected to a battery, such as a waterproof or watertight charging port. In embodiments, the charging port is of a USB-type. In embodiments, the charging port is connected to the power unit and the processor, such as for providing for updating a firmware of the processor. In embodiments, the monitor and / or handle includes means for wireless charging, such that the monitor and / or handle may be wirelessly charged, such as to reduce the risk of water affecting the functionality of the accessory device.

[0034] In embodiments, the monitor, such as the processor thereof, is configured to mirror the one or more images in the display. Thereby, movements of the handle (e.g., caused by the user) based on the one or more images are intuitively displayed in the display. In other words, by mirroring the images in the display, movements of the handle in a certain direction are reflected by a movement in the same certain direction in the display. Thereby, the user may more easily construe the movements he / she causes the handle and catheter coupled thereto.

[0035] In embodiments, the display is a commonly available display suitable for the disclosed use. For example, the display may be an LCD display or an LED display. In embodiments, the display is between 1" and 5" in size (inches in diagonal), such as to provide a small monitor, which is easy to carry. In embodiments, the display has a size of 1", or 2", or 3", or 4", or 5", or more than 5". In embodiments, the display is touch-sensitive, such as to provide for detecting touch gestures, such as pinching to zoom on the images or to turn on / off a light source.

[0036] In an embodiment, the accessory device has a liquid ingress protection rating of at least IPX4 according to the IEC standard 60529. For example, the accessory device may have a liquid ingress protection rating of IPX4, or of IPX5, or of IPX6, and / or of IPX7, and / or of IPX8. Increasing the rating allows for an increased versatile use of the accessory device, such as providing for an accessory device being washable, such as to clean the device in liquids / water after use. Further, the liquid ingress protection rating provides for protecting the accessory device during the catheterization procedure, where exposure to liquids, such as urine, is a possible outcome. In embodiments, at least the handle of the accessory device has a liquid ingress protection rating according to the above embodiment.

[0037] When the proximity of the distal end of a catheter coupled to the accessory device is within the field of view of the first camera it may mean that a point along the first catheter axis is within the field of view of the first camera. Preferably, this point is a distance from the distal end, in the direction opposite the direction towards the proximal end. The point may be below 20 cm from the distal end of the catheter such as below 15 cm, 10, 8 cm, 5 cm, 4, cm, 3 cm, 2 cm, or 1 cm. The point being positioned along the catheter axis provides an accessory device that can observe liquid exiting the catheter when the handle is oriented in any direction as the liquid will exit the catheter along the first catheter axis.

[0038] In embodiments, the first camera has a focus length corresponding to the distance to the point of the intersection between the first optical axis and the first catheter axis. The depth of focus may be such that points closest to the first camera being within the field of view of the first camera and positioned along the first catheter axis are within the depth of focus, such that any liquid observed along the first catheter axis is visible on the images as captured by first camera.

[0039] In embodiments, the monitor includes a strap for securing the monitor to an object, such as a leg of a user. Thereby, the monitor may be supported by the object, such that the user has his / her hands free for manipulating the handle with the catheter. In embodiments, the strap is elastic and flexible, such that the strap may be comfortably arranged about a leg of the user. In embodiments, the strap includes fastening means, such as a buckle or a hook-and-loop fastener for securing the strap tightly to the object. In embodiments, the strap is attached to a back of the monitor, such that the display, being arranged on a front of the monitor, is visible to the user. In embodiments, the strap is attached to a hinge element of the monitor, such that the user may rotate / tilt the monitor relative to the strap and thus the object / leg, such as to provide a comfortable viewing angle for the user. In embodiments, the back of the monitor includes a protrusion, e.g., a coupling mechanism as discussed below, for providing a natural tilt of the monitor when secured to the object / leg.

[0040] In embodiments, the monitor includes a coupling mechanism for releasably coupling the handle to the monitor. Thereby, the handle may easily be stowed away, e.g., for storing and transport. In embodiments, the coupling mechanism is a receptacle or a protrusion. In embodiments, the coupling mechanism is a protrusion engageable with the attachment means of the handle, such that the handle, via the attachment means, may be coupled to the monitor. For example, the protrusion may have an outer shape corresponding to an inner shape of the attachment means, such that the attachment means, and thus the handle, may be coupled to the monitor in the same way as a catheter is coupled to the attachment means.

[0041] In embodiments, the monitor includes a recess or groove arranged between the front and the back of the monitor, the recess or groove extending circumferentially about the monitor, thereby forming a cable drum for storing the strap and / or cable connecting the monitor and the first camera of the handle.

[0042] In embodiments, the monitor is in communication with the first camera through a wired connection. In other words, in an embodiment, a cable connects the monitor and the first camera, and optionally a light source, of the handle. The cable is configured to power the first camera, and optionally a light source, and to transmit image data from the first camera to the monitor. Thereby, the accessory device relies on a physical / wired (as opposed to a wireless) connection between the monitor and the first camera. Thereby, the accessory device, such as the first camera and / or the monitor, is protected from wireless interruptions and / or unauthorized hacking. Thus, the wired connection provides for the user to rest assured that the images as captured by the first camera are not intercepted by an (unauthorized) third-party / man-in-the-middle.

[0043] In embodiments, the handle includes a first interface for receiving a cable, and the monitor includes a second interface for receiving the cable. In embodiments, the cable is releasably couplable to the handle and / or the monitor, such that the handle, cable and monitor may be disconnected from each other in the first and second interfaces, such as to ease storing. In embodiments, the cable is mounted to the first and second interfaces, such as to avoid unintentional disconnection and to avoid the need for assembling the accessory device before use.

[0044] According to an alternative embodiment, the monitor is in communication with the first camera through a wireless connection. According to such embodiment, the handle (e.g., interface thereof) and the monitor (e.g., interface thereof) each includes an antenna and a wireless transceiver for exchanging data, in particular image data indicative of images as captured by the first camera. The transceiver of the handle provides for wireless pairing with the transceiver of the monitor and vice versa. In embodiments, the handle is configured to transmit a signal indicative of an image as captured by the first camera to the monitor. The wireless transceiver may be a Bluetooth transceiver, i.e., the wireless transceiver may be configured for wireless communication according to a Bluetooth protocol, e.g., Bluetooth Low Energy, Bluetooth 4.0, or Bluetooth 5.

[0045] In embodiments, the first camera may, when a catheter is coupled to the handle, include the outlet of the catheter in the field of view of the first camera. This may provide images of any liquid exiting the catheter. The first camera may be arranged such that the proximity of the outlet / distal end of the catheter is within the field of view of the first camera. Having a first camera with a field of view comprising the proximity of the outlet of the catheter does not exclude that the outlet of the catheter is within the field of view.

[0046] In embodiments, the attachment means includes a clip for releasably coupling a connector of a catheter to the handle. Thereby, the insertable portion of the catheter remains sterile and is not confined by the attachment means or the handle as such, such that the insertable portion extends into free space, along a first catheter axis, as will be discussed below. Further, since the insertable portion is commonly provided with a coating providing a low friction, coupling only the connector to the handle provides for easy attachment - the user can hold on to the connector and couple it to the handle without touching the sterile insertable portion.

[0047] In embodiments, the attachment means includes a clip, a groove, a recess, an indentation, or an aperture for fixating a connector of a catheter. The attachment means has the function of fixating at least the distal end of the catheter which may be obtained by any of the above-mentioned features.

[0048] In embodiments, the clip is configured to receive a cylindrical or conical portion, such as a cylindrical or conical portion of connector, having a diameter less than 15 mm, such as in the range from 5 mm to 15 mm, such as between 8 mm and 13 mm.

[0049] In embodiments, the clip includes one or more flexible elements, such as an element supported by a spring and / or elastic material, such that the catheter can be coupled to the clip by manipulating / actuating the flexible element. In embodiments, the flexible element is made of a plastic material, such as a rigid plastic material supported by a spring, and / or a rubber material.

[0050] In embodiments, the clip is configured for fixating a connector of a catheter by means of friction. In embodiments, the clip includes a conical inner shape configured to receive and fixate a connector of a catheter in a sliding motion.

[0051] In embodiments, the clip is a rigid (e.g., made of a plastic material) cylindrical portion or conical portion (or a part thereof) having an inner curvature corresponding to an outer curvature of a catheter, such as a connector thereof, suited for the given inner curvature of the clip. Thereby, it may receive a catheter in a sliding motion, wherein the user slides the catheter, such as the connector thereof, into the clip. Thus, the clip according to the embodiment provides for fixating the catheter by means of friction. Likewise, the user may remove the catheter by sliding the catheter in an opposite direction. A conical inner shape provides for a gradually increasing friction between the connector and the clip as the user slides the connector into the clip. Thereby, the connector, and thus the catheter as such, becomes fixated in the clip in a way in which the catheter may still be removed by the user pulling it in the opposite direction by a force overcoming the friction. The conical inner shape may provide for using different types of catheters, provided they have a suitable connector: the increasing friction provides for sufficiently fixating different catheters to the clip.

[0052] In embodiments, the attachment means, such as in the form of a clip, is integral with the handle, such that the handle comprising the attachment means may be manufactured in a single (injection) moulding or 3D printing process. According to such manufacturing process, the first camera may be installed subsequently, e.g., mounted (e.g., adhered) in a recess of the handle formed in the moulding or printing process.

[0053] In embodiments, the handle includes a light source arranged to provide light in the direction along the first optical axis. Thereby, the camera viewing the proximity of the outlet of a catheter coupled to the handle will be able to acquire images of any liquid exiting the catheter even when there is no ambient lighting present. The accessory device will then be able to assist the user in any lighting condition.

[0054] In embodiments, the first camera is manipulatable, such as tiltable, e.g., through a flexible joint, relative to the body of the handle, such that the user may tilt the first camera relative to the handle.

[0055] In embodiments, the handle includes a flexible joint, wherein the first camera is attached to the flexible joint, thereby providing an adjustable field of view of the first camera relative to the handle and thus the catheter coupled to the handle via the attachment means. Thereby, the user may adjust the camera position and thus the field of view according to dimensions of the pan / toilet, or whatever position the user may desire.

[0056] In embodiments, the flexible joint is lockable relative to the handle.

[0057] In embodiments, the flexible joint is lockable relative to the body of the handle, such that, when the user has tilted the first camera into a desired position, the user may lock the flexible joint in such desired position. Thereby, the user may tilt the first camera, such that the first camera has a field of view as is desired by the user to observe any liquid flow exiting the catheter.

[0058] In embodiments, the flexible joint is a hinge (e.g., a hinge having a hinge axis). Thereby, the user may tilt the camera around the hinge axis to a desired position and lock the hinge to that position. The hinge may help guide the camera to a favorable position as the first camera can only rotate around the hinge in a plane according to the hinge axis.

[0059] In embodiments, the flexible joint is configured such that the first camera is rotatable in any direction. Thus, the first camera has the freedom to rotate in any direction to obtain any desired observation position of liquid exiting the catheter. The first camera may start to rotate in any direction such that a large variety of directions of the first optical axis of the first camera can be obtained.

[0060] In embodiments, the flexible joint includes a ball joint, thereby the first camera is able to rotate in any direction.

[0061] In embodiments, the flexible joint includes three hinges that provide rotation of the first camera in three independent directions. The hinges may constitute a gimbal. Thereby, the first camera is able to rotate in any direction.

[0062] In embodiments, the first camera may be fixated / locked in a position by friction in the flexible joint.

[0063] In embodiments, the first camera may be fixated / locked in a position by a screw.

[0064] In embodiments, the first camera is fixated in the handle relative to the attachment means. Thereby, the user does not need to adjust the first camera, and it is ensured that the proximity of the outlet of the catheter is part of the field of view of the first camera. A user friendly and simple accessory device is thereby provided, although the user cannot adjust the field of view of the first camera. Integrating the first camera into the handle may provide a more compact accessory device.

[0065] In embodiments, the attachment means is configured for fixating a catheter along a first catheter axis, the first camera including a first optical axis defining a first viewing direction, and the first optical axis intersecting the first catheter axis in the proximity of the distal end of the catheter. Thereby, the accessory device is ensured to observe any liquid exiting a catheter coupled to the handle.

[0066] In embodiments, the handle includes a second camera for capturing a second plurality of images. The attachment means may be configured for fixating a catheter along a first catheter axis, and the second camera may be fixated in the handle relative to the attachment means, the second camera including a second optical axis defining a second viewing direction, the second optical axis intersecting the first catheter axis, and the second camera being in communication with the monitor. Thereby, the second camera may be configured to observe the catheter, and in particular a tip / proximal end thereof, rather than liquid exiting the catheter. Thereby, the second camera may assist insertion of the catheter into the meatus.

[0067] The second camera may be in communication with the monitor, the display configured to display the second plurality of images whereby movements caused by a user handling the handle are reflected in the second plurality of images displayed in the display. Thereby, a user may be assisted in insertion of a catheter (via the second camera) and observing the flow of liquid exiting the catheter (via the first camera) such that the user may observe how much urine is exiting the catheter for a given position of the catheter and when the catheter is repositioned, the user can observe the results from this repositioning and whether that led to an increase in the flow of liquid / urine exiting the catheter such that the user may efficiently empty the bladder and the user may further know when the bladder is essentially empty.

[0068] In embodiments, the second camera is fixated relative to the attachment means. By the second camera and the attachment means being fixated relative to each other, such as in / on the handle, the user can manipulate a catheter coupled to the attachment means and see corresponding movements as captured by the second camera on the monitor. In other words, by being fixated relative to each other, the second camera and a catheter coupled to the attachment means move in unison when the user manipulates the handle to provide a steady image of the catheter and the meatal area.

[0069] In embodiments, the viewing direction of the second camera points towards a tip of a catheter coupled to the attachment means. The tip may be substantially in the centre of the images as captured by the second camera. In embodiments, the tip is offset the centre of the image as captured by the second camera, such as to provide a larger image of the meatal area on the display of the monitor.

[0070] In embodiments, the second camera includes a second optical axis defining a viewing direction. Thus, second camera may be said "to point" in a direction being a viewing direction defined by a second optical axis of the second camera. In embodiments, the centre of a field of view of the second camera is coinciding with the second optical axis. The second optical axis defines the viewing direction. Thus, objects being within the field of view, in particular in vicinity of the second optical axis, are captured in images by the second camera.

[0071] For some users, the insertion of a catheter, such as a urinary intermittent catheter, can be difficult for different reasons, including difficulties in seeing and / or identifying the meatus in the meatal area, e.g., due to the presence of skin folds, excessive skin, etc. Further, to avoid urinary tract infections (UTI's), it is advised to insert the catheter without contaminating the sterile insertable portion by touching the surrounding meatal area. The issues described herein are particularly pronounced for women, but the accessory device may be used with catheters suitable for both men and women.

[0072] Embodiments described herein provide a handheld accessory device for visualizing the meatal area on a monitor by means of a second camera moving in unison with the catheter, such that the user is assisted in identifying the meatus and inserting the catheter. In particular, an easy-to-use, handheld and portable accessory device allowing the user to bring the device with him / her and use it during each catheterization is provided.

[0073] Embodiments provide an accessory device having a handle configured to receive a catheter, such that a catheter can be coupled / attached to the handle. In particular, an attachment means of the handle is configured to releasably couple a catheter to the handle. For example, the attachment means may receive a connector of the catheter. Further, the handle includes a second camera for capturing one or more images, preferably of the proximal end of a catheter coupled to the handle and the surroundings thereof (e.g., the meatal area when the catheter and handle are brought into proximity thereof). In embodiments, the second camera is substantially longitudinal (e.g., along an optical axis) and may have a diameter (e.g., of a lens of the second camera) of less than 15 mm, such as less than 10 mm, such as in the range from 3 mm to 8 mm, in order to provide a compact handle. The second camera may be any commercially available second camera suitable for the intended use. In embodiments, the second camera includes an image sensor, such as a CCD sensor or a CMOS sensor.

[0074] In a preferred embodiment, the second camera is configured to capture a plurality of images, such as to form a video. In embodiments, the plurality of images is captured (by the second camera) and displayed (on the display) consecutively to form a video (e.g., with a frame rate of at least 20 FPS). Further, preferably, the video is transmitted / broadcasted to the display of the monitor, without delay, in order to provide a live video footage of the objects being within the field of view of the second camera. Thereby, the movements as caused by the user handling the handle are reflected in the images / video displayed in the display. Thereby, the user can control / manipulate the catheter by holding on to the handle and moving the handle in accordance with what he / she sees on the monitor. Thereby, the user may identify meatus on the display and easily insert the catheter according to the images / video of the monitor. In particular, the user may guide the tip of the catheter into the meatus by observing the tip of the catheter on the display. When the user, e.g., guided by the displayed images / video, has inserted the catheter into the meatus, he / she may keep the handle coupled to the catheter during micturition / voiding, or he / she may decouple the catheter from the handle and proceed with the micturition / voiding.

[0075] In embodiments, the handle has a substantially rectangular cross section having side lengths not exceeding 50 mm, such as to provide a small handheld device. In embodiments, the handle is made of a plastic material and / or a metal, such as aluminium. In embodiments, the handle is formed in an injection moulding process or a 3D printing process. In embodiments, the handle includes an organically shaped body, such as to provide an ergonomic grip.

[0076] In embodiments, the second optical axis intersects the first catheter axis. Thereby, objects (e.g., a catheter), such as parts thereof (e.g., a tip of the catheter), arranged along the first catheter axis may be captured in images by the second camera. The intersection may be created by appropriately engineering the handle, such that the attachment means provides for a coupled catheter being angled relative to the second camera; in other words, that the first catheter axis is angled relative to the second optical axis by an angle providing an intersection between the axes. In embodiments, the angle is between 10 degrees and 30 degrees, such as between 15 and 25 degrees.

[0077] In embodiments, the second optical axis intersects the first catheter axis at a distance between 55 mm and 200 mm from a lens of the second camera. By measuring from a lens of the second camera, alternatively from an image sensor of the second camera, a fixed point of reference is provided. Alternatively, the distance may be measured from a proximal end of the attachment means, the proximal end being the part of the attachment means being closest to a tip of a coupled catheter.

[0078] In embodiments, the proximal end of the attachment means may flush with a distal end of an insertable portion of the catheter, such that a distance from the proximal end of the attachment means to a tip of the catheter corresponds the length of the insertable portion of the catheter. In particular, by measuring from a lens of the second camera, deviations caused by using different types of catheters with the accessory device is avoided. Whereas small deviations may occur from a trigonometric representation of the handle and corresponding axes, it is appreciated that providing the intersection at a certain distance from a lens of the second camera, e.g., said certain distance corresponding to a length of the insertable portion of the catheter, will, in most circumstances, allow for the tip of the catheter to be within the field of view of the second camera. Alternatively, the intersection as measured from a lens of the second camera may be reduced by a factor depending on a distance between the second camera and the attachment means of the handle and on the length of the insertable portion of the catheter coupled to the catheter. A trigonometric deviation supported by figures is provided in the detailed description of the figures.

[0079] By providing the intersection at a distance between 55 mm and 200 mm from a lens of the second camera allows for using the accessory device with female intermittent urinary catheters commonly used in the field.

[0080] In an alternative embodiment, the second optical axis intersects the first catheter axis at a distance between 55 mm and 200 mm from any part of the handle, thereby providing a certain free space between the handle and the tip of the catheter and the meatal area.

[0081] By letting the first catheter axis and the second optical axis intersect, it is provided that a tip of the catheter is within the field of view of the second camera. For example, where a user prefers using a catheter having an insertable length of 100 mm, the handle may be engineered to have the intersection at 100 mm from the second camera lens, whereby it is ensured that the tip of the catheter is within the field of view of the second camera.

[0082] In embodiments, the accessory device is optimised for a category of female intermittent catheters. For example, an accessory device suitable for use with compact catheters (insertable portion having a length of 55 mm to 80 mm) may have an intersection at a distance between 55 mm and 80 mm from a lens of the second camera, such as at 67.5 mm. For example, an accessory device suitable for use with straight catheters (insertable portion having a length of 140 mm to 200 mm) may have an intersection at a distance between 140 mm and 200 mm from a lens of the second camera, such as at 170 mm. For example, an accessory device suitable for use with intermediate catheters (insertable portion having a length of 80 mm to 140 mm) may have an intersection at a distance between 80 mm and 140 mm from a lens of the second camera, such as at 110 mm.

[0083] In embodiments, the second camera has a (e.g., fixed) focus distance corresponding to the distance from the lens of the second camera to the intersection between the second optical axis and the first catheter axis, whereby focus distance is meant the distance from the second camera lens to an optimal focus of the second camera. Preferably, the optimal focus is at the tip of a catheter coupled to the handle, such that the focus distance corresponds to the distance from the second camera lens to the tip of the catheter. Thereby, the tip of a catheter arranged in the intersection between the second optical axis and the first catheter axis and the second optical axis will be in focus in an image generated by the second camera. In embodiments, the second camera includes means for autofocussing, such as means for detecting and autofocussing on a tip of a catheter, thereby providing for focussing on a tip of different lengths of catheters.

[0084] In embodiments, the second camera has a depth of field of at least 60 mm. As commonly defined, the depth of field (DoF) is the distance between the nearest and the farthest objects that are in acceptably sharp focus in an image. A certain DoF may be provided by suitably engineering the optics of the second camera (e.g., by choosing appropriate values for the focal length, aperture size and acceptable circle of confusion size, in conjunction with the distance to the object to be in focus).

[0085] A second camera having a DoF of at least 60 mm provides for using a wide range of different catheters having insertable portions of different lengths and for having both the tip of the catheter and the vicinity thereof, such as the meatal area, in focus simultaneously. For example, a DoF of 60 mm provides for using catheters varying in length by up to 60 mm without having the tip of such a given catheter out of focus, provided that the above intersection between the second optical axis and the first catheter axis intersect at an appropriate distance from a lens of the second camera (or other point of reference on the handle). For example, in embodiments where the intersection between the second optical axis and the first catheter axis is 110 mm from a lens of the second camera and where the DoF is at least 60 mm, the accessory device may be used with catheters having an insertable length within the range from 110 mm + / - 30 mm, i.e. from 80 mm to 140 mm, whereby the tip of said catheters will all be within focus of the second camera (here, neglecting minor deviations occurring from the choice of refence point). Further, the DoF provides for the surroundings, such as the meatal area and / or meatus, and the tip of the catheter to be in focus simultaneously, such that the images displayed in the display adequately visualize both the tip and the meatal area.

[0086] In embodiments, the second camera has a DoF between 10 mm and 150 mm, such as between 20 mm and 100 mm, such as between 30 mm and 90 mm, such as between 40 mm and 70 mm, such as 40 mm, 50 mm, 60 mm, or 70 mm.

[0087] In embodiments, the second camera has a DoF of maximally 10 mm, such as to provide a particularly clear image of a tip end of a catheter, such as where the accessory device is particularly optimised for a certain type of catheter.

[0088] In embodiments, the second camera has a minimum focus distance of maximally 55 mm (i.e., 55 mm or less), such that the second camera can focus on objects (e.g., a tip of a compact catheter) being down to 55 mm from a lens of the second camera. In embodiments, the accessory device further includes a light source, such as a light source associated with the first and / or second camera. In embodiments, the light source is arranged in the handle. In embodiments, the light source is attachable to the handle and / or to the monitor. In embodiments, the light source is arranged in the monitor. In embodiments, the light source is connected to a power unit (e.g., battery) of the monitor, or to a power unit (e.g., battery) of the handle. In embodiments, the light source includes one or more LED's (diodes), such as a plurality of LED's, such as a plurality of white LED's.

[0089] In embodiments, the light source is arranged circularly about the first and / or second camera, such as circularly about a lens of the first and / second camera. Thereby, the light source can illuminate objects arranged along the first and / or second optical axis of the first and / or second camera, respectively. In embodiments, a plurality of LED's is arranged circularly about the first and / or second camera. Thus, the plurality of LED's may be arranged circularly about the first / second optical axis the first / second camera, respectively.

[0090] In embodiments, the light source is configured to generate a light beam being substantially parallel to the first / second optical axis of the first / second camera, respectively. In embodiments, the light beam is substantially coinciding with the first / second optical axis of the first / second camera, respectively. In embodiments, the light beam is a component light beam comprising a plurality of element light beams as generated by a plurality of individual LED's.

[0091] In embodiments, the light beam is convergent towards an intersection between the second optical axis and the first catheter axis. In embodiments, the light beam is divergent. In embodiments, the light beam is substantially parallel to and coinciding with the second optical axis of the second camera. In embodiments, a parallel, convergent or divergent light beam may be formed by adequately arranging and angling the plurality of LED's about the second optical axis.

[0092] By providing a light beam configured to illuminate a tip of a catheter coupled to the handle and in particular to illuminate the surrounding area, such as the meatal area, the benefits of using an accessory device as disclosed is further enhanced. By providing a light beam configured to illuminate liquid exiting the catheter (and thus, e.g., the pan / toilet), the benefits of using an accessory device as disclosed herein is further enhanced.

[0093] In embodiments, the first and / or second camera, and optionally the light source(s), is powered by the power unit of the monitor.

[0094] In embodiments, the second camera is manipulatable, such as tiltable, e.g., through a hinged portion, relative to the body of the handle and / or the attachment means, such that the user may tilt the second camera relative to e.g., the attachment means. In embodiments, the tiltable second camera is lockable relative to the body of the handle, such that, when the user has tilted the second camera into a desired position, the user may lock the second camera in such desired position. Thereby, the user may tilt the second camera, such that second camera has a certain viewing direction relative to a certain first catheter axis of a catheter coupled to the attachment means, as will be introduced below.

[0095] By providing a manipulatable attachment means and / or second camera, e.g., relative to each other, the user may adjust the accessory device according to the catheter he / she prefers to use, e.g., such that the second camera points towards a desired object, e.g., tip of his / her preferred catheter. In alternative embodiments, as will be described in greater detail below, the second camera and the attachment means are fixated relative to the handle and each other. However, according to such embodiments, as will be apparent from the following, a first optical axis of the second camera may intersect a first catheter axis of the catheter to provide a versatile accessory device suitable for use with a range of different catheters without the need for adjusting the attachment means and the second camera prior to use.

[0096] In embodiments, the display is configured to display the first plurality of images from the first camera on the display simultaneously with displaying the second plurality of the images from the second camera on the display or displaying either the first plurality of images or the second plurality of images. The user may, by a user input, change what images are displayed, such as change from the first to the second plurality of images, or vice versa. The user input may be actuating a button of the display to switch display mode between displaying images from the first camera only, displaying images from the second camera only, or displaying images from both cameras simultaneously. Thereby, the user may control what images are displayed in the monitor and thus what camera the images come from. The user may want to have images from the second camera displayed when inserting the catheter into the urethra, and after insertion of the tip of the catheter, the user may want to swap to display images from the first camera in order to observe when liquid starts exiting the catheter as this may happen when the catheter enters the bladder.

[0097] In embodiments, the first camera is attached to a flexible joint and being rotatable such that the first camera can function as the first camera and the second camera. Thereby only a single camera is needed to assist insertion of a catheter and to assist the user to observe when the bladder is completely drained. The first camera may be lockable in at least two positions, the first position arranged such that the proximal end of the catheter, when coupled to the accessory device, is within the field of view of the first camera, the second position arranged such that the proximity of the outlet of the catheter, when coupled to the accessory device, is within the field of view of the first camera. The two lockable positions may be locked by clicking into the positions or locking by splits or screws.

[0098] In a second aspect of the invention, a catheter system for assisting observation of liquid flow through a catheter is disclosed. The catheter system comprises an accessory device and a catheter comprising an insertable portion and a connector, the insertable portion having a proximal end for inserting into a meatus and a distal end opposite of the proximal end, wherein the accessory device includes: a handle comprising an attachment means for releasably coupling a catheter to the handle and for fixating the distal end of catheter relative to the handle, and a first camera for capturing a plurality of images, the first camera arranged with a field of view in the proximity of the distal end of the catheter when the catheter is coupled to the handle; and a monitor in communication with the first camera, the monitor comprising a display configured to display the plurality of images.

[0099] The catheter system incorporates an accessory device according to the first aspect, and it is appreciated that embodiments, features, and related benefits thereof are applicable to the catheter system as disclosed.

[0100] In a third aspect of the invention a method of using a catheter system wherein the catheter is inserted into the urethra is disclosed. The method includes: observing images, as captured by the first camera, on the display of the monitor to observe whether a flow of liquid is present through the distal end of the catheter, adjusting a position of the catheter (such as a position of the catheter in the urethra or bladder) in accordance with the observed flow of liquid.

[0101] By observing images from the first camera on the display, the user may visualise the voiding of the bladder: images / video of liquid exiting the catheter is displayed on the display and the user is thus guided as to when the voiding starts and when it is complete. The step of adjusting the position the catheter for voiding the bladder may be optional or a necessary part of the method for the user to empty the bladder as much as possible. The user may use the observed liquid flow from the images to adjust the catheter to optimise the voiding of the bladder.

[0102] In embodiments, the handle is coupled to (a back of) the monitor, such as in a transport configuration, and as such, the method may include the optional step of decoupling the handle from the monitor. In embodiments, coupling the catheter to the handle includes coupling the connector of the catheter to the attachment means according to previous embodiments, such as coupling the connector to the attachment means in a sliding motion, wherein the connector becomes frictionally fixated to the attachment means.

[0103] In embodiments, as previously disclosed, the accessory device includes a second camera for providing images of the proximal end of the catheter. Observing the images of the first or the second camera on the display of the monitor is provided by means of the first or second camera of the handle capturing images, in particular for the second camera images of the tip / proximal end of the catheter, which are transmitted to the display. By observing the images of the display, the images thus visualizing the tip of the catheter and vicinity thereof (e.g., the meatal area), the user may manipulate / guide the handle such that the meatal area is within field of view of the second camera. Thereby, from the images, the user may locate the meatal area and the meatus, and further, by manipulating / guiding the handle appropriately, guide / bring the catheter into close proximity of the meatus, such that the user may insert the catheter into the meatus. In embodiments, method further includes decoupling the catheter from the handle, such as prior to micturition / voiding or after micturition / voiding. In embodiments, the catheter is decoupled from the handle according to previous embodiments, such as through a sliding motion, wherein the user provides a force overcoming the friction between the connector of the catheter and the attachment means.

[0104] In a fourth aspect of the invention, a method of using a catheter system is disclosed. In particular, the method relates to the use of a catheter system as previously disclosed, and it is appreciated that embodiments thereof are applicable to the method disclosed herein. The method includes: optionally decoupling the handle from the monitor, coupling the catheter to the handle, observing images, as captured by the first camera, on the display of the monitor to observe if a liquid flow is present through the distal end of the catheter, and adjusting the insertion of the catheter for voiding the bladder as much as possible.

[0105] Detailed description of the drawings

[0106] Fig. 1 illustrates a schematic view of an accessory device 100 as described herein. The accessory device 100 includes a handle 110 comprising an attachment means 111 for releasably coupling a catheter 10 (dashed) to the handle, and a first camera 112 for capturing one or more images. Further, the accessory device 100 includes a monitor 120 in communication with the first camera 112, such as through a wired connection by means of a cable 121. Further, the monitor includes a display 122 configured to display the one or more images. The length of the cable may be in the range from 20 cm to 100 cm, such as between 30 cm and 60 cm. The first camera 112 and the attachment means 111 may be fixated in a body 113 of the handle 110, e.g., a body having dimensions providing for a handheld handle 110. The attachment means 111 may be configured to releasably coupling a connector 13 of the catheter 10 to the handle 110, such as to provide for the insertable portion 11 of the catheter 10 to extend into free space. Preferably, the attachment means 111 provides for fixating the catheter 10 along a first catheter axis L (dashed-dotted), and the first camera 112 is arranged in handle 110 such as to define a first optical axis K (dashed-dotted) defining a viewing direction of the first camera 112. Preferably, the first optical axis K intersects the first catheter axis, as illustrated. Thereby, the first camera 112 is configured to capture images of at least the proximity of parts of the catheter 10, such as specifically the proximity or vicinity of a distal end of the catheter. Preferably, the first camera 112 provides for having the distal end of the catheter and the vicinity of the distal end in focus simultaneously. Thereby, the first camera 112 may capture images of urine exiting the catheter via the distal end.

[0107] The body 113 of the handle 110 may have a curved shape, such as to provide an ergonomically grip for the user's hand. This curved shape is illustrated in Fig. 2.

[0108] In the illustrated embodiment, a catheter 10 (dashed) is coupled to the attachment means 111. The attachment means 111 fixates the catheter 10 along a first catheter axis L. The first catheter axis L defines the longitudinal direction of the catheter 10. The first catheter axis L may be defined by appropriately engineering the attachment means 111, such that said attachment means repeatably (i.e., every time) fixates a catheter 10 along the same axis, namely the first catheter axis L.

[0109] The catheter 10 according to the illustrated embodiment includes an insertable portion 11, having a proximal end forming a tip 12 of the catheter 10, and a connector 13 arranged distal to the insertable portion 11. According to the illustrated embodiment, the catheter 10 is coupled to the attachment means 111 of the handle 10 through the connector 13 (see also Fig. 2). Thereby, the insertable portion 11 remains sterile and extends into free space, along the first catheter axis L.

[0110] The first camera 112 is arranged in the handle 110, thereby being fixated relative to the handle 110 and the attachment means 111. The first camera 112 includes a first optical axis K defining a viewing direction of the first camera. In other words, the first camera 112 is capable of capturing one or more images of objects intersecting the first optical axis K, and surroundings thereof, depending on the field of view. The attachment means 111 and the first camera 112 are arranged in the handle and may be separated by a certain distance, e.g., by 10 mm to 30 mm, such as 20 mm. Further, the attachment means 111 and the first camera 112 may be angled relative to each other, so as to make the first catheter axis L intersect the first optical axis K at an intersection point P. In other words, the handle 110 is engineered so as to make the first catheter axis L intersect the first optical axis K. In the illustrated embodiment, the handle 110 is engineered such that the intersection point P is close to the proximity of a distal end of the catheter 10.

[0111] The first optical axis K and the first catheter axis L may not intersect if the axes are parallel. The first camera may be arranged close to the attachment means 111 and with a parallel first optical axis and first catheter axis. The field of view of the first camera should then be wide enough to include the proximity of the outlet of the catheter 10 such that any liquid exiting the catheter can be viewed by (and thus observed via) the first camera.

[0112] The monitor 120 is connected to the handle 110, in particular to the first camera 112 of said handle, by a cable 121. In alternative embodiments, the monitor 120 and the first camera 112 are wirelessly connected. The monitor 120 includes a display 122 configured to display one or more images as captured by the first camera 112. The one or more images are transmitted from the first camera 112 to the monitor 120 and subsequently displayed on the display 122. In a preferred embodiment, the first camera 112 captures a plurality of images consecutively to form a video, which is transmitted to the display 122 without delay, so as to form a live video / footage of the objects within the field of view of the first camera 112.

[0113] Fig. 2 illustrates a perspective view of an embodiment of the accessory device 100. The accessory device includes a handle 110 with a body 113. The handle 110 includes an attachment means 111 and a first camera 112 arranged in the handle 110. The body 113 of the handle 110 may have a curved shape in a direction from the attachment means 111 to the first camera 112, such as to provide an ergonomically grip for the user's hand. In the illustrated embodiment, the curved shape is such that there is a thinner portion next to the attachment means for easier grip of the handle 110. The user may prefer to grip the handle 110 with his / her thumb and index finger and this may be made easier by providing a thinner portion, or by providing an ergonomic portion.

[0114] The attachment means 111 according to the illustrated embodiment includes a cylindrical portion 114 having a slit for easy insertion of a catheter into the attachment means 111. The cylindrical portion 114 may have an inner conical curvature narrowing towards a proximal end Illa of the attachment means 111, such as to provide fixation of a catheter through a sliding motion, wherein the user slides a connector of a catheter along the first catheter axis until the friction between the connector and the inner conical curvature of the cylindrical portion 114 causes the connector, and as such the catheter, to be (releasably) fixated in / coupled to the attachment means 111. In embodiments, parts of the cylindrical portion 114 is resilient and / or flexible, e.g., supported by a spring or an elastic material, such as to provide a firm grip of a catheter (e.g., connector thereof).

[0115] A light source may be provided circularly about the first camera 112. The light source may include a plurality of LED's arranged circularly about the first camera, such as circularly about the first optical axis of the first camera 112. The light source may be powered by a power unit of the handle 110 and / or the monitor, such as powered through the cable 121 extending from the handle 110 to the monitor (not shown). The light source is configured to generate a light beam being substantially parallel to the first optical axis of the first camera 112, such that images captured by the first camera 112 are illuminated by means of the light source.

[0116] Fig. 2 further illustrates an embodiment of the handle 110, wherein a catheter 10 (dashed) is coupled to the attachment means 111. In particular, the connector 13 of the catheter 10 is coupled to the attachment means 111. The catheter 10 is fixated by the attachment means 111, the former thereby extending along the first catheter axis L. Thus, a longitudinal direction of the catheter 10 coincides with the first catheter axis L. Further, the first optical axis K of the first camera 112 extends in such a way that said first optical axis K intersects the first catheter axis L in an intersection point P (here, in the proximity of the distal end of the catheter). Thereby the first camera 112 may capture images (e.g., to form a video) of the distal end of the catheter and / or the vicinity thereof.

[0117] Fig. 3 illustrates a use situation of the accessory device 100 as described herein. The monitor 120 is secured to a leg 91 of the user by means of a strap 127. The handle (not visible) is manipulated by the user's hands 92. On the display 122 of the monitor 120, the user can see images 94' of any liquid exiting the catheter. The images / video are / is recorded by the first camera (not visible) of the handle. A distal end of a catheter 12' (e.g., visible on the display 121 of the monitor 120) is coupled to the attachment means of the handle, such that the user can void the bladder and visually observe when the voiding has started and when the voiding has ended by looking at the display 122. For example, the user may use the images / video to observe the effect of repositioning the catheter so as to continue the voiding and thereby completely empty the bladder. Thus, for the user to get a better understanding of what position of the catheter is best / optimal for effective voiding of the bladder, the user may observe on the display whether a movement of the catheter resulted in more urine exiting the catheter.

[0118] Fig. 4 illustrates a schematic view of an accessory device 100 as described herein. The accessory device 100 includes a handle 110 comprising an attachment means 111 for releasably coupling a catheter 10 (dashed) to the handle, and a first camera 112 for capturing one or more images. Further, the accessory device 100 includes a monitor 120 in communication with the first camera 112, such as through a wired connection by means of a cable 121. Further, the monitor includes a display 122 configured to display the one or more images.

[0119] In the illustrated embodiment, the accessory device includes a flexible joint 130. The first camera 112 is connected to the flexible joint 130, here illustrated as a ball joint. The flexible joint 130 may also be one or more hinges or another type of joint. The flexible joint 130 is connected to the body 113 of the handle 110 and the first camera 112. The flexible joint may include multiple parts that are able to rotate relative to each other. This enables rotation of the first camera 112 relative to the handle 110 around, e.g., three independent rotation axes. Thus, the user may adjust the camera position to a desired position for better observing any liquid exiting a catheter coupled to the handle 110. In Fig. 4, the first camera 112 is illustrated in three different positions (dashed) rotated relative to each other.

[0120] In embodiments, the flexible joint further allows the first camera to be rotated such that the field of view included the tip of the catheter at the proximal end of the catheter 10. Hereby, the same camera 112 may be used to assist a user when inserting a catheter and when observing the liquid exiting the catheter 10, thereby providing a simple accessory device.

[0121] Embodiments of this invention accommodate for a large range of different catheters, in particular catheters having different (insertable) lengths. By the distal end of the catheter being fixed at the handle, the first camera may always be able to obtain images of the proximity of this distal end. For the embodiment illustrated in Fig. 4, the first camera may need an adjustable focus distance to provide images of the tip of a catheter as well as images of the distal end of the catheter or the proximity of the distal end of the catheter.

[0122] Fig. 5 illustrates an accessory device 100 comprising a handle 110 with attachment means 111, a monitor 120 with a display 122, a first camera 112, and a second camera 112'. The monitor is communicatively connected to the first camera 112 and the second camera 112'. The first camera has a first optical axis K. The second camera 112' has a second optical axis K'.

[0123] The first camera 112 is integrated in the handle such that the field of view of the first camera 112 include at least the vicinity of the outlet / distal end of a catheter that is attached to the attachment means 111. The outlet of the catheter may also be included in the field of view of the first camera 112.

[0124] The second camera 112' is integrated with the handle and arranged with the second optical axis pointing towards the tip of a catheter coupled to the attachment means 111. The second camera 112' has a field of view that includes / encompasses the tip of the catheter as well as the surroundings such that the images obtained with the second camera 112' can assist the user with the insertion of the catheter 10 into a meatus.

[0125] When having two cameras, the monitor 120 may display only images from the first camera 112, only images from the second camera 112', or images from both the first camera 112 and the second camera 112' simultaneously. The situation of displaying a image from both cameras at once is illustrated in Fig. 5, where the image from the first camera 112 is displayed on the right half of the display and the image from the second camera 112' is displayed on the left half of the display. The display may have this split functionality to display images on both sides. The images illustrated may not be acquired simultaneously but are to illustrate how the user can be assisted using the visualisation that both cameras provide.

[0126] It is to be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed. The words "comprising" and "including" may be used interchangeably.

[0127] It is to be noted that the words "a" or "an" preceding an element do not exclude the presence of a plurality of such elements.

[0128] Although particular features have been shown and described, it will be understood that they are not intended to limit the claimed invention, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the claimed invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense. The claimed invention is intended to cover all alternatives, modifications, and equivalents.

Claims

Claims1. An accessory device for observing a flow of liquid exiting a catheter having a proximal end for insertion into a urethra and an opposite distal end, wherein the accessory device comprises: a handle comprising an attachment means for releasably coupling a catheter to the handle and for fixating the distal end of the catheter relative to the handle, and a first camera for capturing a first plurality of images, the first camera arranged with a field of view of the proximity of the distal end of the catheter when the catheter is coupled to the handle; and a monitor in communication with the first camera, the monitor comprising a display configured to display the first plurality of images.

2. The accessory device according to claim 1, wherein the attachment means comprises a clip for releasably coupling a connector of a catheter to the handle.

3. The accessory device according to claim 2, wherein the clip is configured for fixating a connector of a catheter by means of friction.

4. The accessory device according to any one of claims 1-3, wherein the handle comprises a flexible joint, wherein the first camera is attached to the flexible joint for the field of view of the first camera to be adjustable.

5. The accessory device according to claim 4, wherein the flexible joint is lockable relative to the handle.

6. The accessory device according to claim 4-5, wherein the flexible joint comprises a hinge.

7. The accessory device according to claim 4-5, wherein the flexible joint is configured such that the first camera is rotatable in any direction.

8. The accessory device according to any one of claims 4-5 and 7, wherein the flexible joint comprises a ball joint.

9. The accessory device according to any one of claims 1-3, wherein the first camera is fixated in the handle relative to the attachment means.

10. The accessory device according to claim 9, wherein the attachment means is configured for fixating a catheter along a first catheter axis, the first camera comprises a first optical axis defining a first viewing direction, and the first optical axis intersects the first catheter axis in the proximity of the distal end of the catheter.

11. The accessory device according to any one of claims 1-10, wherein the handle comprises a second camera for capturing a second plurality of images, the attachment means is configured for fixating a catheter along a first catheter axis, the second camera is fixated in the handle relative to the attachment means, the second camera comprises a second optical axis defining a second viewing direction, the second optical axis intersects the first catheter axis, and the second camera being in communication with the monitor.

12. The accessory device according to claim 11, wherein the first catheter axis and the second optical axis intersects in the proximity of the proximal end of the catheter and the display is configured to display the second plurality of images whereby movements caused by a user handling the handle are reflected in the second plurality of images displayed in the display.

13. The accessory device according to any one of claims 11-12, wherein the display is configured to display the first plurality of images from the first camera on the display simultaneously with displaying the second plurality of the images from the second camera on the display or displaying either the first plurality of images or the second plurality of images and by a user input changing to display the plurality of images from the opposite camera.

14. A catheter system for assisting observation of liquid flow through a catheter, the catheter system comprising an accessory device and a catheter comprising an insertable portion and a connector, the insertable portion having a proximal end for inserting into a meatus and a distal end opposite of the proximal end, wherein the accessory device comprises: a handle comprising an attachment means for releasably coupling a catheter to the handle and for fixating the distal end of catheter relative to the handle, and a first camera for capturing a plurality of images, the first camera arranged with a field of view in the proximity of the distal end of the catheter when the catheter is coupled to the handle; and a monitor in communication with the first camera, the monitor comprising a display configured to display the plurality of images.

15. A method of using a catheter system according to claim 14, wherein the catheter is inserted into the urethra, wherein the method comprises: observing images, as captured by the first camera, on the display of the monitor to observe if a flow of liquid is present through the distal end of the catheter, - adjusting a position of the catheter in accordance with the observed flow of liquid.

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