216 results about "Drainage catheters" patented technology

A drainage catheter is adapted to drain fluid from the body cavity through a body conduit and includes an elongate tube having a distal end and a retention member disposed at the distal end and adapted for movement between the low-profile state facilitating insertion of the catheter and a high-profile state facilitating the tension of the catheter in its operative position. A woven mesh forms at least a portion of one of the tube and the retention member, and can be made permeable or impermeable in various regions of the catheter. The woven mesh can be formed of filaments heat-settable so that the catheter automatically moves to the high-profile state. Insertion of the catheter can be facilitated using an obturator and a guidewire in an associated method, an obturator facilitating insertion of the catheter can be removed to permit the catheter to automatically return to a normal, high-profile state.

A drainage catheter includes a tubular member with an anchor at a distal end and suture threads extending from the anchor to the proximal ends of the tubular member. A locking mechanism attaches to the proximal end of the tubular member and includes a body with an extension of the lumen. A displaceable body in the locking mechanism body attaches to the proximal end of the sutures to control the amount of slack or tension in the suture threads. An extension of that displaceable body lies externally of the locking mechanism body to enable the operation of the displaceable body without handling the suture threads.

In accordance with one embodiment of the invention, there is provided a wound drainage system for draining fluid from a wound of a patient. The system includes a drain catheter. A suction means applies suction at the drain catheter such that fluid is drawn from the wound. While drawing fluid from the wound, a controller periodically increases and decreases the application of suction at the drain catheter. This allows the tissue surrounding the wound drain to relax, thus preventing obstruction of the drain catheter.

A drainage catheter assembly for the insertion of a drainage catheter percutaneously includes a trocar, a cannula, a catheter stiffener, and a catheter. The trocar includes a distal pointed end, a proximal end, a uniform cross-sectional shape between the distal pointed end and the proximal end, and a means located at the proximal end for releasably connecting with a cannula. The cannula may include a distal end, a proximal end, a cannula lumen extending therethrough, and a means located at the proximal end for releasably connecting with the trocar and catheter stiffener. The catheter stiffener includes a distal end, a proximal end, a body portion comprising stiff material, a catheter stiffener lumen extending therethrough, and a means located at the proximal end for releasably connecting with the cannula and catheter. The elongated catheter includes a distal end containing a tapered tip, a proximal end, a catheter lumen extending therethrough, and a means for releasably connecting with the catheter stiffener.

A mechanism for use with an anchoring structure of a drainage catheter. A suture thread as a flexible link extends from the distal end of a catheter through the catheter lumen to the mechanism at the proximal end of the catheter. The mechanism includes a distal body affixed to the proximal end of the catheter and a proximal body that can be displaced axially with respect to the distal body between clamping and unclamped positions. In a clamped position, the bodies clamp the suture thread to prevent inadvertent displacement of the suture thread. Displacement of the proximal body in certain embodiments takes up slack in the suture thread generated when the anchor forms.

A catheter kit including a drainage catheter hub having a rotatable lever handle adapted to secure a suture thread to maintain the anchor configuration of the distal end of the catheter to secure the position of the catheter within the patient's body. The rotatable lever handle has a released position for allowing movement of the suture and a secured position for preventing movement of the suture. A rotatable lever handle adapted to secure the proximal portion of the suture that may otherwise remain loose during the procedure. The rotatable lever handle and associated rotatable barrel can be depressed relative to hub body in a locked configuration to prevent inadvertent rotational movement of the rotatable lever handle and a release slot or release button that can be actuated by the practitioner with a release tool to allow for rotational movement of the rotatable lever handle.

The present invention relates to a catheter that includes an elongate body having distal and proximal ends, the elongate body having at least one lumen therethrough, a distal portion of the elongate body having a perimeter. First and second retention members of the catheter are first and second retention members selectively disposed in either an insertion state or a retention state. In the insertion state, the first and second retention members form a distal body defining a central axis, the central axis being generally spaced apart from the perimeter of the distal portion of the elongate body, the distal body and elongate body insertable along a passageway of a mammal. In the retention state, the first and second retention members are selectively disposed in a spaced apart configuration to resist proximal movement of the catheter along the passage of the mammal.

A reversible lockable drainage catheter for use in draining excess bodily fluid in a tissue having a catheter tube with a proximal end and a distal end, and a lockable hub positioned about the catheter tube. A suture of the drainage catheter can be reversibly tensioned, and locked in the tensioned conformation by depressing one or more surfaces of the lockable hub. The suture can then be released also by depressing one or more surface of the lockable hub, or by implementing one or more additional safety release mechanisms. For example, a safety release can be pulled in a proximal direction to release a tensioned suture. Similarly, the suture can be tensioned to a point that stretches an attachment point of the drainage catheter tube, and also causes the suture and safety release mechanism to disengage.

An atherectomy system for removing a stenotic lesion from within a vessel of a patient is disclosed. The system comprising an atherectomy device for reducing the lesion and a separate elongate drainage catheter for evacuating from the treated vessel embolic particles released into the vessel from the stenotic lesion during its reduction by the atherectomy device during an atherectomy procedure. The atherectomy device and the separate elongate drainage catheter are each configured for introduction into the patent's vasculature though separate openings in at least one peripheral artery of the patient.

A portable systems release fluid pressure with a cavity within a patient. These systems include a drainage catheter, a pressure-responsive one-way valve, and a fluid reservoir all adapted to be mounted in proximity to the cavity being drained. One system in particular is used in relieving intracranial pressure. This intracranial pressure relief system may include a headband to which are mounted the one-way valve and reservoir. The drainage catheter may have mounted thereon a cranium seal formed of a soft material that contacts the inner wall of a cranium bore hole. The cranium seal may have threads to facilitate advancement into the bore hole.

A multi-layer odor barrier catheter tube for a fecal drainage catheter. The external surface has a low coefficient of friction, as does the internal surface. The layers of the catheter tube may be co-extruded, or formed as a heat-laminated film rolled into a cylindrical shape and heat-welded. A flexible scrim may be included intermediate the first and third layers. One or more tie layers may be included between at least one of the first and second layers, or the second and third layers. A combination of a multi-layer odor barrier catheter tube with an odor barrier collection bag is also described.

A system and method for intracranial access is disclosed. In particular, a drill stop is shown providing a way to control the penetration of a drill bit as an access hole into the brain is being formed. Access to a desired location is achieved using a catheter guide device. Also disclosed is a mechanism by which multiple diagnostic and treatment devices can be placed at a desired location in brain tissue without the need for more than one access hole. A drainage catheter is disclosed with a mechanism to allow both drainage and to allow intracranial pressure measurement.

A drainage catheter includes an elongated tubular member and a locking assembly. The locking assembly includes a first protruding element and a collar. The first protruding element is disposed proximal to a port in the tubular member through which a proximal portion of a tension member may exit. The collar is coaxially disposed about the tubular member and has a second protruding element projecting from an interior surface of the collar. The collar is configured for longitudinal sliding movement relative to the tubular member such that the collar may be moved along the tubular member toward the proximal end of the tubular member thereby interacting with the first protruding element and securing the proximal portion of the tension member between the first protruding element and the collar.

The invention relates to a medical needle which is applicable to a drainage treatment of pneumothorax, in particular to tensive pneumothorax, and is applicable to the drainage treatment of pleural effusion. The invention adopts the technical proposal that: the needle is a disposable thorax drainage needle; a cavity is arranged in a drainage conduit port base which is provided with a side drainage conduit that is connected with the base, extends to the outside and is communicated with a drainage conduit; one end of the side drainage conduit, which is connected with the drainage conduit port base, is positioned at the front end of the cavity; the tail end of the side drainage conduit is provided with at least a port which is provided and connected with an emergency end cover that is a unidirectional gas valve; by adopting the technical proposal, the invention provides a disposable thorax drainage needle which is applicable to pneumothorax drainage treatment, in particular to tensive pneumotharox, and is applicable to the drainage treatment of pleural effusion, and the needle is not easy to damage intercostal vessels in puncturing and drains gas rapidly.

A monitor-driven intracranial catheter assembly including dual lumen catheter for monitoring intracranial pressure via a pressure sensor located in one lumen while simultaneously draining cerebrospinal fluid through another lumen. A third lumen can also be provided with a side port for receiving a stylet. The stylet is used as a stiffening agent to aid in advancing the catheter into the patient's brain. The pressure sensor is preferably a spectral modulation sensor that communicates with a photodetector apparatus by means of a single optical fiber, thus minimizing the diameter of the catheter. The photodetector is self-correcting for signal errors caused by temperature change, changes in intensity of the input light, and transmission losses within the optical apparatus. Moreover, the photodetector operates off the output voltage of the standard hospital monitor by “scaling” the signal from the monitor to provide a pressure measurement signal that emulates the output of a piezoresistive strain gauge sensor or Wheatstone bridge. Therefore, the entire catheter assembly is designed to be used with any of the common types of hospital monitors. The pressure monitoring catheter assembly can be used in any situation requiring very sensitive pressure measurements and can be zeroed and calibrated in situ.

An improved drainage catheter having one or more inlet holes along the length of the catheter is described whereby the cross-sectional areas of the successive inlet holes decreases, the decrease first occurring at the inlet hole immediately following the most proximal inlet hole. This change in cross-sectional area alters the typical inflow of fluid into the catheter such that a disproportionately high volume of fluid no longer enters the most proximal inlet hole. This decrease in inflow at the most proximal inlet hole results in less deposition of debris within the catheter at that position. With less deposition of debris at this location, the likelihood of complete catheter failure is reduced. A preferred embodiment is described wherein the change in cross-sectional area results in approximately uniform inflow into all inlet holes.

The invention relates to washable negative pressure drainage dressing which comprises a sponge body, a drainage catheter and a washing catheter, wherein a double-cavity catheter is inserted in the sponge body, a plurality of through holes are evenly arranged on the wall of the double-cavity catheter inserted in the sponge body, and the outer end of the double-cavity catheter is connected with the drainage catheter and the washing catheter through a tee joint. A washing cavity channel and a drainage cavity channel are arranged in the double-cavity catheter. According to the washable negative pressure drainage dressing, the medical sponge body can be repeatedly washed in the treatment process, so that phenomena such as unsmooth drainage caused by drying and blocking of the sponge body in the wound negative pressure treating process are avoided. The washable negative pressure drainage dressing is reasonable in structure and convenient to operate and use, and reduces dressing change times and risk of clinical infection. In addition, the clinical operation is safe and convenient.

The invention discloses a double-cannula drainage tube, mainly comprising a drainage catheter, a connecting tube, a connecting rod and a joint, wherein the drainage catheter comprises a drainage catheter outer tube and a drainage catheter inner tube; the drainage catheter inner tube penetrates through the connecting rod, and is connected with the connecting tube; the drainage catheter outer tube is connected with one end of the connecting rod; the tube wall of the drainage catheter outer tube is provided with a plurality of channels along a circumferential direction of the tube wall; each channel extends to the other end of the drainage catheter outer tube from one end of the drainage catheter outer tube; one end of each channel is communicated with the cavity; the other end of each channel is an opening end; the other end of the connecting rod is fixed at a joint position between the drainage catheter inner tube and the connecting tube; the connecting rod is provided with an air vent hole and a medicine injection washing hole; the medicine injection washing hole is communicated with the cavity, so that washing liquid and medicine liquid can flow into a patient body through a plurality of through holes, therefore the situation that double cannulas cannot be used due to the blockage caused by washing and medicine injection can be prevented.