A magnetic field-compatible medical fiber delivery control device in a narrow space

Abstract

The present invention discloses a medical fiber delivery control device in a narrow space and compatible with a magnetic field, comprising a sleeve, a displacement control assembly, and a direction control balloon; the displacement control assembly comprises a displacement slider and a displacement control balloon, the displacement control balloon is circumferentially fixed to the inner wall of the sleeve proximal end, surrounds and covers the outer wall of the displacement slider at both ends in the axial direction of the sleeve, and controls the displacement of the displacement slider by different filling states of the displacement control balloon at different positions; the direction control balloon is circumferentially fixed to the inner wall of the sleeve distal end, surrounds and covers the outer wall of the medical fiber distal end, and controls the bending state of the medical fiber by different filling states of the direction control balloon in different directions; the displacement slider is used to load the medical fiber. The device of the present invention can accurately control the bending state and delivery depth of the distal end of the medical fiber by controlling the different filling states of different balloons, without the need to adopt a mechanical structure based on the electric control principle, and has good magnetic field compatibility.

Description

Technical Field

[0001] The present invention relates to the field of minimally invasive surgical instruments, and in particular to a medical fiber delivery control device that is compatible with a magnetic field in a narrow space. Background Art

[0002] In the field of modern medicine, the development of minimally invasive surgical technology has put forward higher requirements for medical devices, especially when performing surgery in a narrow space, such as middle ear surgery through the external auditory canal, laser stapes floor fenestration, ear scar removal; nasal cavity and sinus lesion cleaning and treatment through the anterior nares; laryngeal vocal cord polyp removal through the oropharynx, etc., which require the ability to accurately deliver medical fibers (such as laser fibers, capillary suction tubes, or medical electrode probes, etc.) in a narrow space to achieve accurate treatment or diagnosis. However, the delivery of existing medical fibers relies on the operator holding them or using a mechanical structure based on the principle of electronic control, which has the following shortcomings:

[0003] (1) In minimally invasive surgery, medical fibers are very small, making it difficult to achieve precise delivery and distal direction control through direct manual manipulation, which can easily lead to large errors and affect the accuracy and efficiency of the surgery.

[0004] (2) The mechanical structure based on the electric control principle has magnetic field compatibility issues in the magnetic field of magnetic resonance imaging (MRI), making it difficult to achieve remote operation under magnetic navigation or magnetic resonance guidance. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for use in confined space surgery, which can achieve precise control of the bending direction, bending degree and delivery depth of the distal end of a medical fiber, and the device can meet application requirements in a magnetic field environment.

[0006] In order to achieve the above-mentioned object, the present invention provides a medical fiber delivery control device in a narrow space and compatible with a magnetic field, comprising a sleeve, a displacement control component and a plurality of direction control balloons arranged inside the sleeve; the displacement control component comprises: a displacement slider and a plurality of displacement control balloons, wherein,

[0007] The displacement control balloon is circumferentially fixed to the inner wall of the proximal end of the bushing and surrounds and covers the outer walls of the displacement slider at both ends of the bushing in the axial direction. The displacement of the displacement slider in the axial direction of the bushing is controlled by different filling states of the displacement control balloon at different positions.

[0008] The direction control balloon is circumferentially fixed to the inner wall of the distal end of the sleeve and surrounds and covers the outer wall of the distal end of the medical fiber. The bending state of the medical fiber is controlled by different filling states of the direction control balloon in different directions.

[0009] The displacement slider is provided with a loading slot for loading the medical fiber.

[0010] Furthermore, it also includes a limiting balloon, which is located at both ends of the displacement control component in the axial direction of the bushing. The limiting balloon always remains in a fully filled state and is used to limit the axial displacement of the displacement slider.

[0011] Furthermore, the direction control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

[0012] Furthermore, the displacement control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

[0013] Furthermore, the bushing is composed of an upper bushing and a lower bushing that can be detachably assembled.

[0014] Furthermore, the loading slot of the displacement slider is also provided with a snap-fit ​​fixing piece for fixing part of the medical fiber inside the loading slot.

[0015] Furthermore, the bending state of the medical fiber includes the bending direction of the medical fiber.

[0016] Furthermore, the medical fiber includes any one of an optical fiber and a medical electrode.

[0017] Furthermore, the diameter of the medical fiber is 0.1 mm to 1 mm.

[0018] Furthermore, the diameter of the bushing is 1 mm to 10 mm.

[0019] Compared with the prior art, the beneficial effects of the present invention include at least:

[0020] The medical fiber delivery control device of the present invention includes a sleeve and a displacement control assembly and a plurality of direction control balloons arranged inside the sleeve; the displacement control assembly includes a displacement slider and a plurality of displacement control balloons, and by controlling different filling states of different direction control balloons and different displacement control balloons, it is possible to achieve precise control of the bending state and delivery depth of the distal end of the medical fiber. On the one hand, the middle part of the medical fiber is loaded and fixed in the displacement slider, and the displacement control balloon can control the displacement of the displacement control assembly in the axial direction inside the sleeve, thereby driving the axial movement of the medical fiber inside the sleeve; on the other hand, the bending state of the distal end of the medical fiber can be controlled by the direction control balloon. The present invention realizes the simultaneous control of the bending state and delivery depth of the distal end of the medical fiber, improves the accuracy and efficiency of the operation, and does not require the use of a mechanical structure based on the electric control principle, thereby improving the magnetic field compatibility.

[0021] Furthermore, in the displacement control assembly of the present invention, the limiting balloon always remains fully filled, so that the displacement slider can only move axially between the limiting balloons provided at both ends of the displacement control assembly, effectively preventing excessive delivery of the medical fiber, thereby further improving the accuracy of the delivery depth of the distal end of the medical fiber.

[0022] Furthermore, the sleeve of the present invention is a detachable structure, and medical fibers can be installed by opening the upper sleeve, which facilitates the installation and replacement of medical fibers and further improves the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axial cross-sectional view of the medical fiber delivery control device of the present invention; wherein, area A represents the displacement control section of the bushing, and area B represents the direction control section of the bushing.

[0024] Figure 2 It is a structural schematic diagram of the displacement slider of the present invention.

[0025] Figure 3 It is a transverse cross-sectional view of the displacement control section of the medical fiber delivery control device of the present invention.

[0026] Figure 4 It is a transverse cross-sectional view of the direction control section of the medical fiber delivery control device of the present invention.

[0027] Description of the accompanying drawings:

[0028] Bushing 10, upper bushing 11, lower bushing 12, displacement control section A, direction control section B,

[0029] Displacement control assembly 20, displacement slider 21, loading slot 211, buckle fixing member 212, displacement control balloon 22, first set of displacement control balloon 221, second set of displacement control balloon 222,

[0030] The limiting balloon 30, the first group of limiting balloons 31, the second group of limiting balloons 32,

[0031] Direction control balloon 40, first direction control balloon 41, second direction control balloon 42, third direction control balloon 43,

[0032] Medical fiber 50. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] The diameter of the "narrow space" described herein is 1 mm to 10 mm.

[0037] The “distal end” mentioned herein refers to a direction close to the interior of the patient's body cavity, and the “proximal end” mentioned herein refers to a direction close to the operator.

[0038] The "axial direction" described herein refers to a direction parallel to the central axis of the bushing.

[0039] The "delivery depth" described herein refers to the distance that the distal end of the medical wire extends from the distal end of the hub.

[0040] As described in the background art, for minimally invasive surgery, the existing medical fiber delivery methods have problems with low control accuracy of distal bending direction and delivery depth, and insufficient magnetic field compatibility, which cannot meet the strict requirements for accuracy and safety during surgery.

[0041] To solve the above problems, the present invention provides a small medical fiber delivery control device that is compatible with a magnetic field in a narrow space. The device adopts a balloon control method inside the device, and controls the filling state of the balloon by filling or discharging the fluid in different balloons, thereby generating pressure on the distal end of the medical fiber and / or the displacement slider that conflicts with the balloon, causing the distal end of the medical fiber to bend and promote the axial movement of the displacement slider. Since the medical fiber is partially fixed in the displacement slider, the medical optical fiber can move with the axial movement of the displacement slider, thereby achieving the control of the bending state and delivery depth of the distal end of the medical fiber, thereby improving the accuracy and efficiency of the operation.

[0042] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0043] Figure 1 The figure shows an axial cross-sectional view of the medical fiber delivery control device (hereinafter referred to as "this device") provided by the present invention. The medical fiber 50 includes but is not limited to any one of an optical fiber and a medical electrode, and the diameter of the medical fiber 50 is 0.1 mm to 1 mm.

[0044] The device comprises a sleeve 10, a displacement control assembly 20 and several direction control balloons 40 disposed within the sleeve 10; the displacement control assembly 20 comprises a displacement slider 21 and several displacement control balloons 22. The sleeve 10 has an outer diameter of 1 mm to 10 mm, making it suitable for surgeries in confined spaces.

[0045] Specifically, the displacement control balloon 22 is circumferentially fixed to the inner wall of the proximal end of the bushing 10, forming a displacement control section A inside the bushing 10. The displacement control balloon 22 surrounds and covers the outer wall of the displacement slider 21 at both ends of the bushing 10 in the axial direction. The displacement of the displacement slider 21 in the axial direction of the bushing 10 is controlled by the different filling states of the displacement control balloon 22 at different positions.

[0046] The direction-control balloon 40 is circumferentially fixed to the inner wall of the distal end of the sleeve 10, forming a direction-control section B within the sleeve 10. The direction-control balloon 40 surrounds and covers the outer wall of the distal end of the medical fiber 50. The different filling states of the direction-control balloon 40 in different directions control the bending state of the distal end of the medical fiber 50, and the bending state includes the bending direction and / or bending degree.

[0047] The displacement slider 21 is provided with a loading slot 211 for loading the medical wire 50. Figure 2 In this embodiment, the overall structure of the displacement slider 21 is spindle-shaped, octahedral-like. A groove is etched downward at the top of the displacement slider 21 to form a loading slot 211 for the medical fiber 50. The cross-sectional width of the loading slot 211 matches the diameter of the medical fiber 50. A snap-fit ​​fixture 212 is also provided at the top of the loading slot 21. The cavity formed between the snap-fit ​​fixture 212 and the loading slot 211 is used to load the medical fiber 50. The snap-fit ​​fixture 212 is used to limit and fix the medical fiber 50, so that when the displacement slider 21 moves axially, the medical fiber 50 can be driven to move axially accordingly.

[0048] In some embodiments, each displacement control balloon 22 and each direction control balloon 40 are fixed to the inner wall of the sleeve 10 by gluing, and each displacement control balloon 22 and each direction control balloon 40 can flow in or out of a fluid through a set of catheters (not shown) to change the filling state of the displacement control balloon 22 and the direction control balloon 40. The fluid includes but is not limited to any one of gas and liquid. In this embodiment, the catheter can be attached to the inner wall of the sleeve 10 and extend along the inner wall of the sleeve 10 to the outside of the sleeve 10, and connected to an external air pump. The air pump pumps air into or out of the displacement control balloon 22 and the direction control balloon 40 to control the filling state (size and pressure state) of the balloon.

[0049] This device controls the bending state and delivery depth of the distal end of the medical fiber 50 by adjusting the filling state of different balloons, thereby achieving excellent magnetic field compatibility. This differs from traditional medical fiber delivery control devices, which typically use mechanical structures based on electronic control principles (such as motors) to drive the bending and movement of the medical fiber. However, these mechanical structures often contain metal or magnetic materials and are easily disturbed in magnetic fields, potentially causing device failure or posing a safety threat to the patient's surgical area.

[0050] Figure 3The figure shows a transverse cross-sectional view of the displacement control section A of the bushing 10 in this embodiment. The number of the displacement control balloons 22 can be designed according to the actual required delivery depth of the medical fiber 50. In this embodiment, the displacement control assembly 20 is provided with two groups of displacement control balloons 22, which are respectively recorded as the first group of displacement control balloons 221 and the second group of displacement control balloons 222 from the distal end to the proximal end. The number of displacement control balloons 22 in each group is four, and each group of displacement control balloons 22 is provided in the same cross-section of the inner wall of the displacement control section A, and the four displacement control balloons 22 in each group are distributed at equal intervals in the circumferential direction of the cross-section. See FIG. Figure 1 The first group of displacement control balloons 221 and the second group of displacement control balloons 222 surround and cover the outer walls of the displacement slider 21 at both ends in the axial direction of the sleeve 10. As an example, when the internal gas of the first group of displacement control balloons 221 is discharged and the second group of displacement control balloons 222 is inflated, the first group of displacement control balloons 221 becomes smaller and the second group of displacement control balloons 222 becomes larger, applying pressure toward the distal end to the displacement slider 21, causing the displacement slider 21 to move axially toward the distal end, thereby driving the medical fiber 50 to move axially toward the distal end. By gradually controlling the inflation or exhaust volume of different groups of displacement control balloons 22, the axial displacement distance of the medical fiber 50 inside the sleeve 10 is controlled, thereby enabling the medical fiber 50 to gradually reach the required delivery depth according to surgical requirements.

[0051] In this embodiment, the device further includes two sets of limiting balloons 30, designated as the first set of limiting balloons 31 and the second set of limiting balloons 32, from distal to proximal. Both sets are always fully inflated, limiting the axial displacement of the displacement slider 21. This allows the displacement slider 21 to move axially only between the first and second sets of limiting balloons 31, 32, thereby preventing excessive delivery or withdrawal of the medical fiber 50. This design effectively maintains the positional stability of the displacement slider 21 while allowing the surgeon to finely adjust the axial displacement of the medical fiber 50 to accommodate varying surgical requirements.

[0052] Figure 4A transverse cross-sectional view of the direction control section B of the sleeve 10 described in this embodiment is shown. In this embodiment, three direction control balloons 40 are provided circumferentially on the inner wall of the proximal end of the sleeve 10, designated as a first direction control balloon 41, a second direction control balloon 42, and a third direction control balloon 43. The three direction control balloons 40 surround and cover the outer wall of the distal end of the medical fiber 50 and contact the surface of the medical fiber 50. The three direction control balloons 40 are evenly spaced around the same cross-sectional area of ​​the inner wall of the direction control section B, ensuring balanced force on the medical fiber 50 in the circumferential direction and avoiding damage to the medical fiber 50 caused by local stress concentration. As an example, when the three direction control balloons 40 are in the same state of inflation, the distal end of the medical fiber 50 is subjected to the same pressure in the corresponding directions of the three direction control balloons 40. At this time, the distal end of the medical fiber 50 is located at the central axis of the direction control section B. As another example, when the first and third directional control balloons 41 and 43 remain inflated while the second directional control balloon 42 continues to be inflated, the second directional control balloon 42 expands, and the distal end of the medical fiber 50 is subjected to upward pressure from the second directional control balloon 42, causing the distal end of the medical fiber 50 to bend upward. Therefore, by controlling the inflation or deflation of the directional control balloons 40 in different directions, the bending direction and / or degree of the distal end of the medical fiber 50 can be precisely controlled.

[0053] It can be understood that the medical fiber 50 has a certain rigidity due to its own material properties, such as the optical fiber mainly made of quartz glass, which can provide certain support for its shape. In minimally invasive surgery, the distance that the distal end of the medical fiber 50 extends from the sleeve 10 is relatively short, only 3mm to 5mm. Therefore, when the distal end of the medical fiber 50 extends from the distal end of the sleeve 10 between the direction control balloon 40, the distal end of the medical fiber 50 can still maintain an ideal bending state, thereby still providing precise guidance for the operation.

[0054] Continue to see Figure 1 、 Figure 3 and Figure 4 In this embodiment, the sleeve 10 is composed of an upper sleeve 11 and a lower sleeve 12 that can be detachably assembled. As an example, when the upper sleeve 11 is opened, the displacement control balloon 22 and the direction control balloon 40 are attached to the inner walls of the upper sleeve 11 and the lower sleeve 12, the displacement slider 21 is inserted between the displacement control balloons 22, and the medical fiber 50 is installed in the loading slots 211 of the direction control balloon 40 and the displacement slider 21. This design allows the medical fiber 50 to enter the interior of the sleeve 10 without extending from the proximal opening of the sleeve 10, thereby reducing the difficulty of installing and replacing the medical fiber 50 and further improving the efficiency of the operation.

[0055] In some embodiments, a lubricating liquid is coated on the surface of the displacement slider 21 so that the displacement slider 21 can move smoothly in the axial direction inside the bushing 10 when pushed by the displacement control balloon 22 .

[0056] In some embodiments, the device is used in conjunction with an endoscope to observe in real time the bending state of the distal end of the medical fiber 50 and the delivery depth of the distal end of the medical fiber 50, so as to adjust in real time the filling state of the direction control balloon 40 and the displacement control balloon 22 in different positions or directions, thereby achieving the ability to gradually adjust the distal end of the medical fiber 50 to accurately reach the target area.

[0057] The method for using the medical fiber delivery control device of the present invention is as follows: open the upper sleeve, stick a direction control balloon and a displacement control balloon on the inner wall of the lower sleeve, connect the catheter of each balloon to a fluid pump; insert a displacement slider between each displacement control balloon, fix the middle part of the medical fiber required for the operation in the loading slot of the displacement slider, place the distal end of the medical fiber between each direction control balloon, and cover it with the upper sleeve. The operator holds the device close to the patient's lesion and controls the fluid pump to pump fluid into or out of different displacement control balloons, finely adjust the filling state of different displacement control balloons, thereby pushing the displacement slider to move a set distance to the distal end, and then driving the medical fiber to accurately deliver a set depth to the distal end; the operator controls the fluid pump to pump fluid into or out of different direction control balloons, finely adjust the filling state of different direction control balloons, so that the distal end of the medical fiber bends along the target direction. In conjunction with the endoscope, the operator observes and adjusts the sizes of different balloons in real time, thereby adjusting the bending state of the distal end of the medical fiber and the delivery depth of the distal end of the medical fiber in real time, ultimately allowing the medical fiber to accurately reach the target area.

[0058] In summary, the present invention provides a medical fiber delivery control device that is compatible with a magnetic field in a narrow space. The device can accurately control the bending and movement of the medical fiber by controlling the different filling states of the balloons in the direction control section and the displacement control section. The bending state of the distal end of the medical fiber is controlled by the direction control balloon, while the middle part is fixed in the displacement slider, and the displacement control balloon controls the axial movement of the displacement slider in the sleeve to achieve axial delivery of the medical fiber. This device design not only improves the accuracy and efficiency of the surgery, but also enhances the magnetic field compatibility because it does not require the use of a mechanical structure based on the principle of electrical control, providing a new solution for minimally invasive surgery in a small space.

[0059] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A medical fiber delivery control device compatible with magnetic fields in narrow spaces, characterized in that: It includes a bushing, a displacement control component, a plurality of direction control balloons and a limit balloon arranged inside the bushing; the displacement control component includes: a displacement slider and a plurality of displacement control balloons, wherein, The displacement control balloon is circumferentially fixed to the inner wall of the proximal end of the bushing and surrounds and covers the outer walls of the displacement slider at both ends of the bushing in the axial direction. The displacement of the displacement slider in the axial direction of the bushing is controlled by different filling states of the displacement control balloon at different positions. The direction control balloon is circumferentially fixed to the inner wall of the distal end of the sleeve and surrounds and covers the outer wall of the distal end of the medical fiber. The bending state of the medical fiber is controlled by different filling states of the direction control balloon in different directions. The displacement slider is provided with a loading slot for loading the medical fiber; The limiting balloons are located at both ends of the displacement control component in the axial direction of the bushing. The limiting balloons are always kept in a fully filled state and are used to limit the axial displacement of the displacement slider.

2. The magnetic field compatible medical fiber delivery control device for narrow spaces according to claim 1, characterized in that: The direction control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the sleeve.

3. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The displacement control balloons are distributed at equal intervals in the circumferential direction of the inner wall of the bushing.

4. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The bushing consists of an upper bushing and a lower bushing which can be detachably assembled.

5. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The loading slot of the displacement slider is further provided with a snap-fit ​​fixing piece for fixing a portion of the medical fiber inside the loading slot.

6. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The bending state of the medical fiber includes the bending direction of the medical fiber.

7. The narrow space, magnetic field compatible medical fiber delivery control device according to claim 1, characterized in that: The medical fiber includes any one of an optical fiber and a medical electrode.

8. The magnetic field compatible medical fiber delivery control device for narrow spaces as claimed in claim 1, characterized in that: The diameter of the medical fiber is 0.1 mm to 1 mm.

9. The magnetic field compatible medical fiber delivery control device for narrow spaces as claimed in claim 1, characterized in that: The diameter of the bushing is 1 mm to 10 mm.

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