408 results about "Outer Cannula" patented technology

A nozzle includes a nozzle bayonet with a warm seal positioned at a distal end and a nose seal positioned at a proximal end so that a distal passage is defined between the warm and nose seals. The nozzle also includes a nozzle poppet valve. Purge and vent lines are in fluid communication with the distal passage. A receptacle includes a receptacle poppet valve, a receptacle inner tube and a receptacle outer tube with a receptacle insulation space defined therebetween. A coupling space is defined between an outer casing and the receptacle outer tube. The receptacle coupling space receives the nozzle bayonet. The receptacle sequentially engages the warm seal and the nose seal of the nozzle during insertion of the nozzle bayonet into the receptacle coupling space with the nozzle and receptacle poppets engaging to open the nozzle and receptacle poppet valves when the nozzle bayonet is fully inserted into the receptacle coupling space.

The pair of expandable foreign body forceps comprises an outer sleeve and a foreign body forceps body, a limiting assembly is arranged at one end of the outer sleeve, and an expansion assembly is arranged at one end of the outer sleeve; the expansion assembly comprises a first notch formed in one end of the outer sleeve, an expansion air pipe is arranged in the first notch, one end of the expansion air pipe is fixedly connected with an expansion air bag, one end of the expansion air pipe is fixedly connected with a three-way pipe, one end of the three-way pipe is fixedly connected with an injector, and one end of the three-way pipe is provided with an expansion valve. A rotating plate is rotationally installed on the outer surface of the cylinder, an arc-shaped plate is fixedly installed on one side of the rotating plate, and an anti-skid pad is fixedly installed on the inner surface of the arc-shaped plate. According to the pair of expandable foreign body forceps, foreign bodies can be blocked while an esophageal cavity is expanded through the arranged expansion assembly, so that the situation that the foreign bodies are pushed to deeper tissues is prevented, and the efficiency of taking out the foreign bodies by the pair of expandable foreign body forceps is improved.

The invention relates to the technical field of dissectors, and discloses a medical ablation electrode dissector which comprises a handle sleeve and further comprises an electric knife head fixedly connected with the handle sleeve, a splicing sleeve fixedly connected to one end of the handle sleeve, a push-pull piece slidably connected with an outer sleeve and a guide pipe fixedly connected between the splicing sleeve and the outer sleeve. The two separators are both connected with the push-pull piece in a sliding mode, the viscous sleeve is fixedly connected to the end, away from the splicing sleeve, of the guide pipe, the electrotome head penetrates through the splicing sleeve and the guide pipe, and the push-pull piece is attached to the guide pipe. Through a sliding connection structure of the push-pull piece and the separator, reciprocating motion of the separator is achieved, active cleaning of the surface of the electrotome head can be completed, impurity splashing caused by outward pushing force of a traditional pushing stripping structure is avoided, the separator is of an arc-shaped structure matched with the surface profile of the electrotome head, stress is uniform during cleaning, the cleaning precision is improved, and the service life of the electrotome head is prolonged. And cleaning blind areas are reduced.

The intrauterine adhesion therapeutic apparatus comprises two skeleton layers, the two skeleton layers are symmetrically arranged to form a uterus-shaped ring, and the uterus-shaped ring is of a bionic uterus structure; each skeleton layer comprises a first supporting piece and a second supporting piece, the first supporting piece and the second supporting piece are arranged in a hinged mode, a longitudinal rod is hinged to the top ends of the two skeleton layers, the intrauterine adhesion therapeutic apparatus further comprises an outer sleeve, a connecting pipe is fixedly arranged at the bottom of the outer sleeve, and the bottom ends of the two skeleton layers are hinged to the connecting pipe. The outer sleeve sleeves the outer part of the longitudinal rod in a sliding manner; an opening is formed in the bottom of the longitudinal rod, internal threads are arranged at the bottom of the longitudinal rod, the longitudinal rod is connected with a push assisting rod through the internal threads, nerves of the cervix uteri and the private part can be continuously anesthetized through medicine, the postoperative analgesia effect is achieved, and meanwhile needed medicine can be injected through the device for further treatment.

The utility model relates to a suturing device. The suturing device comprises an outer sleeve and a suturing mechanism. A window allowing target tissue to enter is formed in the side wall of the far end of the outer sleeve, the window is communicated with an inner cavity of the outer sleeve, and the inner cavity is further used for being communicated with a negative pressure source. The suture mechanism is arranged in the outer sleeve and used for suturing the target tissue sucked into the window. When the suturing device is used for suturing a sampling channel, the suturing device extends into a preset part in the sampling channel to adsorb the target tissue on one side wall of the sampling channel, and the adsorbed target tissue protrudes out of the inner wall of the sampling channel; therefore, the suture mechanism can suture the target tissue sucked into the window. Therefore, a binding and pressing mode in the related technology does not need to be adopted, so that the rehabilitation time can be shortened, and the postoperative risk is reduced.

The invention relates to the technical field of medical instruments, in particular to a split type hemorrhoid artery ligation hemorrhoid suspension operation positioning device and application thereof. The device comprises an outer sleeve and an inner sleeve, the inner sleeve is movably and / or rotatably arranged in a cavity of the outer sleeve, the outer sleeve is provided with an outer sleeve operation window, the inner sleeve is provided with an inner sleeve operation window, and the outer sleeve operation window and the inner sleeve operation window can be moved or rotated. The outer sleeve operating window and the inner sleeve operating window are at least partially aligned with each other at at least one operating window position; the outer sleeve and the inner sleeve longitudinally extend to at least partially form a cylindrical or conical or truncated cone-shaped structure, the outer sleeve forms a tubular shell main body and a shell split body along the longitudinal extension direction, and the side edges of the tubular shell main body and the shell split body are detachably connected; an optical unit is arranged on the shell split body so as to irradiate the cavity of the outer sleeve.

The plugging drainage device comprises an outer sleeve, a flushing pipe, an inner suction pipe and an umbrella-shaped plugging mechanism, a plurality of first through holes are formed in the front end of the outer sleeve, the inner suction pipe is arranged in the outer sleeve, a plurality of second through holes are formed in the front end of the inner suction pipe, and the umbrella-shaped plugging mechanism is arranged in the inner suction pipe. The umbrella-shaped plugging mechanism is arranged at the front end of the outer sleeve and can be retracted into the outer sleeve. The device is provided with the plugging mechanism, the fistula can be plugged during flushing, intestinal juice loss is effectively avoided, postoperative recovery of a patient is facilitated, the umbrella-shaped structure is adopted for plugging, compared with bag plugging, the umbrella fabric of the umbrella-shaped structure can be tightly attached to the wound surface, obstruction is effectively avoided, and the application safety of the device is further improved.

A bone marrow aspiration device includes an outer cannula connected to an outer handle, and a first cannula that fits through the outer cannula and extends beyond a distal end of the outer cannula. The first cannula is connected to a first handle including a mating feature. A removable sharp stylet fits coaxially through the first cannula and is connected to a stylet handle including a mating feature to engage with the mating feature of the first handle, to couple the stylet handle to the first handle. A proximal end of stylet forms an adapter to couple to a drill, the first cannula and stylet rotating together when driven by the drill coupled to the adapter. A second cannula fits through the first cannula once the stylet is removed, a distal end of the second cannula closing off the distal end of the first cannula but leaving open one or more side apertures in the first cannula, to aspirate bone marrow through the open side apertures. A screw mechanism, formed by a lead screw extending from the first handle and engaging a threaded portion of the outer handle, allows the first cannula to be retracted through the outer cannula with rotation of the first handle relative to the outer handle.

The invention discloses a stomach bypass stent conveying device with externally-adjusted rigidity and a stent conveying system, and relates to the field of medical instruments. The device comprises a small release ball, a storage tube, an outer tube, a handle and a rigidity regulator, the rigidity adjuster comprises an outer sleeve and an air pipe, the outer sleeve comprises a first adjusting pipe and a second adjusting pipe which are coaxially arranged, the second adjusting pipe is sleeved with the first adjusting pipe, an outer sleeve inner cavity is formed between the first adjusting pipe and the second adjusting pipe, and the air pipe is communicated with the outer sleeve inner cavity so that the outer sleeve inner cavity can be inflated or vacuumized. The second adjusting pipe is slidably arranged on the outer pipe in a sleeving mode. When the inner cavity of the outer sleeve is filled with air, the stomach bypass stent conveying device with externally adjusted rigidity is in a flexible state; when the inner cavity of the outer sleeve is vacuumized, the stomach bypass stent conveying device with the externally-adjusted rigidity is in a rigid state. The rigidity of the gastric bypass stent conveying device is adjusted by adjusting the vacuum state in the inner cavity of the outer sleeve, and the storage tube can conveniently enter a scotodoor.

A dental high-speed contra-angle handpiece (1) for processing hard materials in the oral cavity of a patient, comprising: an outer sleeve (2) delimiting the dental high-speed contra-angle handpiece (1) from the environment, said outer sleeve having a handle portion (2A) extending along a longitudinal axis (3) and a head portion (2B) extending along a rotational axis (4), wherein the longitudinal axis (3) and the rotational axis (4) are arranged at an angle other than 0° to one another; a holding device (5) arranged in the head portion (2B) for holding a processing tool (6) such that it can rotate about the rotational axis (4); a tool receiving opening (7) for inserting and releasing the processing tool (6) into the holding device (5); a mechanical drive device (8) for rotating the holding device (5) to an idle speed of at least 140,000 rpm; and a spring element (25) preloaded and displaceable along the rotational axis (4). Actuator (19),which is operatively connectable to the holding device (5) in order to selectively move the holding device (5) from a first position, in which the machining tool (6) is fixed in the holding device (5), to a second position, in which the machining tool (6) can be inserted into or removed from the holding device (5), characterized in that the holding device (5) comprises: a drive sleeve (9) for releasably receiving a shaft (6A) of the machining tool (6), wherein the drive sleeve (9) has an outer wall (9A) in which a plurality of through-bores (10) are provided, and the outer wall (9A) surrounds a cylindrical interior (11) in which the shaft (6A) of the machining tool (6) can be received, a plurality of holding bodies (12) movable radially to the axis of rotation (4), wherein a holding body (12) can be received in each of the through-bores (10) of the drive sleeve (9),a clamping sleeve (13) which is displaceable along the rotational axis (4) and has a clamping sleeve wall (13A) which surrounds the holding bodies (12) and at least the section of the drive sleeve (9) having the through-bores (10), wherein by displacing the clamping sleeve (13) along the rotational axis (4), the holding bodies (12) are movable radially with respect to the rotational axis (4) and the clamping sleeve (13) and / or the holding bodies (12) selectively assume the first position and the second position, wherein in the first position the holding bodies (12) are pressed by the clamping sleeve (13) into the through-bores (10) of the drive sleeve (9) in such a way that sections of the holding bodies (12) protrude into the cylindrical interior (11) of the drive sleeve (9), whereby the shank (6A) of the machining tool (6) is fixed in the cylindrical interior (11) of the drive sleeve (9), and in the second position the Clamping sleeve (13) surrounds the holding body (12) with play,so that the holding bodies (12) can be moved radially away from the axis of rotation (4), whereby the shaft (6A) of the machining tool (6) can be inserted into or removed from the drive sleeve (9).

The invention provides an ablation needle assembly and an ablation system. The ablation needle assembly comprises a hollow outer sleeve and an ablation needle, the outer sleeve is movably arranged outside an electrode needle body of the ablation needle in a sleeving mode and is detachably and rotatably connected with an ablation handle, so that after ablation operation is completed, the ablation needle and the outer sleeve can be detached, the outer sleeve is still left in tissue, a channel is provided for other operations such as biopsy, and the ablation needle assembly is simple in structure and convenient to use. Repeated puncture is avoided, damage to tissue is reduced, and biopsy operation can be more convenient and efficient. Furthermore, the ablation handle is rotationally connected with the outer sleeve, so that the ablation handle can drive the electrode needle main body to rotate relative to the outer sleeve when rotating relative to the outer sleeve, that is, the outer sleeve and the electrode needle main body are not of an integrated structure, and when the ablation needle needs to be rotated, the outer sleeve can be kept not rotating, so that damage to tissues is reduced; and the rotation resistance is small. Therefore, the ablation needle assembly and the ablation system are particularly suitable for radiofrequency ablation treatment of hypertrophic cardiomyopathy.

Provided is a method for determining bending information, applied to a luminal endoscope outer sleeve. A plurality of bending measurement tubes are sequentially arranged on an inner wall of the luminal endoscope outer sleeve; each of the bending measurement tubes corresponds to a unique digital identifier; the bending measurement tubes each comprise a cable and a bourdon tube, wherein fixing end points of the cable and the bourdon tube on the inner wall of the outer sleeve are the same, a fixing starting point of the cable is located at one of a plurality of first calibration positions on the inner wall of the outer sleeve, and a fixing starting point of the bourdon tube is located at a second calibration position of the inner wall of the outer sleeve; a displacement sensor is arranged at the fixing starting point of the cable of each of the bending measurement tubes; and fixing end points of the bending measurement tubes on the inner wall of the outer sleeve are different. The method comprises: for the plurality of bending measurement tubes, determining cable displacement information on the basis of the displacement sensors (S110); and determining bending information of the luminal endoscope outer sleeve on the basis of the digital identifiers of the plurality of bending measurement tubes, the cable displacement information, and sectional diameters of the bourdon tubes (S120).

The invention relates to the technical field of medical auxiliary instruments, in particular to an anti-falling and anti-leakage thoracic and abdominal cavity drainage auxiliary device which comprises a self-sleeving elastic tube, a fixing cover, a hoop ring and an infusion piece, the self-sleeving elastic tube comprises an inner sleeve part and an outer sleeve part with an air bag arranged at one end, the inner sleeve part is inserted into the outer sleeve part, and the fixing cover is arranged on the outer sleeve part; the air bag end of the outer sleeve part is hermetically connected with one end of the inner sleeve part; the fixed cover is movably sleeved outside the outer sleeve part; the shroud ring is movably connected to the fixed cover in a sleeving manner; and the infusion piece is communicated with the air bag. The auxiliary drainage tube can adapt to patients with different cortex thicknesses, the fixing depth of the auxiliary drainage tube in the pleuroperitoneal cavity is more appropriate, and the anti-leakage effect is achieved.

The invention relates to a surgical instrument which comprises a jaw assembly, an angle steering part, a sleeve assembly and a locking assembly, the sleeve assembly comprises an inner sleeve and an outer sleeve annularly sleeving the inner sleeve, and the jaw assembly is rotatably connected with the inner sleeve through the angle steering part; the angle steering piece comprises a matching part; the locking assembly comprises a locking part and an elastic piece, the outer sleeve is detachably connected with the locking part, one end of the elastic piece is connected with the inner sleeve, and the other end of the elastic piece is connected with the locking part; when the outer sleeve is located at the near-end position, the outer sleeve is connected with the locking part to restrict the movement of the locking part, so that the locking part keeps being separated from the matching part, and the elastic piece is compressed; in response to the movement of the outer sleeve from the near-end position to the far-end position to the far side, the outer sleeve relieves the restriction on the locking part, so that the elastic piece is released to drive the locking part to move to the far side to be matched with the matching part. The locking assembly can quickly and stably lock the angle steering piece, and the jaw assembly is prevented from rotating relative to the sleeve assembly.

This invention generally relates to a method for performing an endoscopic procedure. According to some aspects of the invention, the method comprises placing an endoscope shaft within a body cavity at a desired examination point, the endoscope shaft having a proximal end, mid shaft and a distal end, the distal end terminating in an endoscope tip, wherein the endoscope tip is proximal to the desired examination point, positioning a segment of a longitudinally opened overtube over the endoscope mid shaft, wherein the overtube including a longitudinal reclosable seam along an entire length of the overtube, an inner surface, an outer surface, a proximal end and a distal end, a positioning ring adjacent the distal end on the outer surface, at least one sealing band on the inner surface, and an independently positionable occlusion catheter terminating in an asymmetrical occlusion balloon; at least one handle at the proximal end and on the outer surface for grasping and manipulation of the overtube within the body cavity. The method further comprises closing the seam of the segment of the overtube positioned over the endoscope mid shaft to form a longitudinally closed overtube and move the closed overtube over the endoscope shaft as guide within the body cavity and repeat the closing and moving till the overtube reaches the desired examination point, inflating the positioning ring to create a seal between the outer surface of the overtube and a body cavity proximal to the endoscope tip, wherein when inflated the positioning ring expanded asymmetrically around the overtube, inflating the at least one sealing band to create a seal between the internal surface of the overtube and endoscope shaft, passing the independently positionable occlusion catheter terminating in the asymmetrical occlusion balloon through a passageway along the overtube to enter the body cavity at the end of the overtube, manipulating the independently positionable occlusion catheter to a selected point within the body cavity distal to the endoscope tip, inflating the occlusion catheter balloon to create seal between the occlusion catheter balloon and the body cavity, and creating a sealed examination compartment between the positioning ring, the asymmetrical occlusion balloon and the sealing band surrounding the distal end of the endoscope shaft.

The present invention discloses a visual hematoma removal device, comprising a support body, an endoscope assembly and an outer sleeve, wherein the support body has a suction cavity inside, and the rear end of the outer sleeve is fixedly connected to the front end of the support body. The endoscope assembly comprises an endoscope and a rod body, wherein the rod body can pass through the rear part of the support body and extend into the outer sleeve via the suction cavity, and the lens of the endoscope is arranged at the front end of the rod body and extends to the front end of the outer sleeve. A suction tube is arranged on the side wall of the support body, wherein one end of the suction tube is connected to the outer sleeve through the suction cavity, and the other end is used for detachably connecting an aspirator. The visual hematoma removal device disclosed in the present invention combines endoscope technology, can achieve zero object distance imaging, and transforms the original blind operation of puncture and catheterization, hematoma suction, etc. into a visual operation, and can also suction blood and water in the brain tissue to avoid affecting the imaging effect of the lens, thereby improving the operation safety under the visual state, and also improving the accuracy of hematoma removal and the efficiency of surgery.

The surgical instrument comprises a jaw assembly, a sleeve assembly, an angle steering part, a locking part and a transmission mechanism, and the jaw assembly is rotatably connected with the sleeve assembly through the angle steering part; the sleeve assembly comprises an outer sleeve, and the outer sleeve is connected with the locking piece through a transmission mechanism so as to selectively drive the locking piece. The outer sleeve moves towards the far side to sequentially pass through a first stroke and a second stroke, and when the outer sleeve moves towards the far side in the first stroke, the nail abutting seat rotates to a first preset angle, and the locking piece is driven to move to a locking state; and during the far-side movement in the second stroke, the nail propping seat rotates from a first preset angle to a closed state, moves relative to the locking piece in a non-driving manner, and keeps the locking piece in a locking state. Before the jaw assembly closes and clamps the tissue, the locking piece is in a locking state, that is, no matter what thickness the jaw assembly clamps the tissue, the locking piece can lock the jaw assembly without affecting the outer sleeve to continue to move towards the far side to drive the jaw assembly to be closed at the same time.

The invention is applicable to the technical field of medical instruments, and provides an interventional therapy device for alimentary canal hemorrhage, which comprises an outer sleeve and a guide wire arranged in the outer sleeve, and further comprises a plurality of hemostatic clips, each hemostatic clip comprises a cylindrical body, a ball head is fixed at one end of each cylindrical body, and the other end of each cylindrical body is rotatably connected with two clamping jaws; a guide cavity is formed in the cylindrical body in the length direction, a guide block is slidably connected into the guide cavity, a tension spring is fixed to the end, close to the ball head, of the guide block, and the tail end of the tension spring is fixed into the guide cavity; when a plurality of hemostatic clips are sequentially connected end to end, the two clamping jaws on one hemostatic clip clamp the ball head on the adjacent hemostatic clip, so that the two adjacent hemostatic clips are in ball joint. A plurality of hemostatic clips can be placed in the outer sleeve at a time, a plurality of hemostatic clips can be used in sequence, the outer sleeve and the guide wire do not need to be repeatedly pulled out from a biopsy duct of an endoscope during use, then the surgical efficiency is improved, and surgical operation steps are simplified.

The peritoneal drainage flushing tube comprises an intra-peritoneal flushing drainage section, an extension section and a connecting section which are connected in sequence, a drainage groove is formed in the peripheral face of the intra-abdominal cavity flushing drainage section, and a drainage section flushing inner cavity is formed in the intra-abdominal cavity flushing drainage section. A drainage cavity is formed in the extension section, and an extension section washing inner cavity is further formed in the extension section. The connecting section comprises an outer sleeve and a movable inner pipe; a drainage connector is installed at the end, away from the extending section, of the connecting section, and a negative pressure mechanism is connected to the drainage connector. A flushing connector is arranged at the end, extending out of the outer sleeve, of the movable inner pipe, and a flushing pipeline is connected to the flushing connector. According to the peritoneal drainage flushing tube, the drainage groove is formed in the peripheral surface of the intra-peritoneal flushing drainage section, the surface roughness of the intra-peritoneal flushing drainage section can be increased to the maximum extent through the design of the drainage groove, the tube blocking phenomenon is not prone to being caused, and compared with an existing smooth drainage round hole, the practicability is higher.

A device for tissue shaving includes an elongated outer cannula having a tissue pinching distal end, an elongated inner shaft extending through the cannula and having a tissue shaver at a distal end. The tissue pinching distal end of the outer cannula is configured to pinch a portion of the tissue and the tissue shaver of the inner shaft is configured to be rotated and cut the pinched tissue portion via a shearing action.

The utility model relates to the technical field of fallopian tube dredging devices, in particular to a fallopian tube catheter suite, a guide tube comprises a first tube body and a first connector which are communicated, the first tube body can be inserted into an outer sleeve, and an inner catheter can be inserted into the first tube body from a side connector; the fallopian tube suite can be switched to a first working state when the guide tube is located in the outer sleeve; on the basis of the first working state, when the inner guide pipe is located in the guide pipe, the inner guide pipe can be switched to the second working state; on the basis of the second working state, the guide wire can be switched to the third working state when the guide wire is located in the inner catheter; the fallopian tube catheter suite has the advantages that the fallopian tube catheter suite provides a hardware basis for a series of operations such as fallopian tube radiography, sterilization, dredging, suction and lavage, the functions can be achieved through one suite, and the surgical operation process is greatly simplified.

The utility model relates to the technical field of water purification equipment pipeline connection, and discloses a water purification equipment pipeline connection assembly which comprises an inner pipe, an outer sleeve and a sliding insertion pipe, a guide sliding way is formed between the inner pipe and the outer sleeve, and a preorder sealing piece connected with the sliding insertion pipe is arranged in the guide sliding way. A locking piece used for locking the state of the sliding cannula is arranged on the outer cannula, and a follow-up sealing piece is further arranged between the locking piece and the sliding cannula. According to the pipeline connecting assembly, the inner pipe, the outer sleeve and the sliding insertion pipe are arranged to form a telescopic sliding connecting structure, when a pipeline needs to be connected, the sliding insertion pipe is inserted along the guide sliding way and slides left and right in the guide sliding way, so that the overall length of the pipeline connecting assembly is adjusted, and then locking is conducted through the locking piece; and the preorder sealing piece and the subsequent sealing piece respectively provide good sealing in the guide slide way, so that the sealing performance and the stability of pipeline connection of the water purification equipment are ensured.

An optical cannula system can include a cannula, a body, a first tube, a second tube, and a valve assembly. An outer cannula wall can define an interior space extending along an axis of the cannula. One or more inner cannula walls within the outer cannula wall can divide the interior space into a first channel and a second channel. A proximal portion of the cannula can be received within the body. The first and second tubes can extend from the body. The valve assembly can have a first configuration in which the first tube is in fluid communication with the first channel and the second tube is in fluid communication with the second channel. The valve assembly can have a second configuration in which the first tube is in fluid communication with the second channel and the second tube is in fluid communication with the first channel.

Aspects of the present invention relate to a method for locating an expandable implant for treating BPH within the prostatic urethra of a patient. The delivery device comprises an inner tube and an outer sleeve moveable relative to the inner tube between a stored position and a deployed position. The outer sleeve surrounds the inner tube to define an annulus therebetween and the expandable implant is retained within the annulus when the outer sleeve is in the stored position.

The invention discloses a double-channel negative pressure flushing device with an alarm function, and particularly relates to the technical field of peritoneal flushing, the double-channel negative pressure flushing device comprises a double sleeve, a flushing pipe of the double sleeve is connected with a flushing pipeline, and a suction pipe of the double sleeve is connected with a negative pressure drainage assembly through a drainage pipe fitting; the drainage pipe fitting comprises a drainage pipe and an outer sleeve arranged on the outer side of the drainage pipe in a sleeving mode, a plurality of first steel wire rings are arranged on the inner wall of the outer sleeve, a plurality of inner supporting pieces are fixed to the drainage pipe and used for reducing the probability that the drainage pipe is bent and blocked, and an outer protection assembly is arranged on the outer side of the double sleeves. The probability that the double sleeves and the drainage tube are bent and blocked is low, and an alarm can be given when the double sleeves and the drainage tube are bent and blocked and the collection container is about to be full of liquid, so that normal flushing work is guaranteed, and the treatment effect is guaranteed.

The present invention relates to a large wound suturing device with multiple nails tightened continuously, which belongs to the technical field of medical devices and solves the problem of difficulty in suturing large wounds. The suturing device of the present invention comprises: a guide wire, an outer sleeve, a suture, a suture nail and an indication component; the end of the outer sleeve is provided with an internal thread and screwed to the suture nail; a plurality of suture nails can rotate synchronously; the guide wire is inserted into the interior of the outer sleeve, and a driving boss is provided at the end to engage with the top suture nail, and the guide wire can drive the suture nail to rotate when rotating; the end of the suture nail is provided with a screwing part, and when the suture nail rotates, the screwing part can be screwed into the tissue to be sutured; the suture is connected between the plurality of suture nails; the indication component is provided at the end of the outer sleeve, and when the guide wire rotates, the number of rotations can be displayed through the indication component. The present invention realizes the rotational nailing and release of the suture nail, and connects the suture nail to tighten the wound surface through the suture, which is simple and convenient to operate, and can display the screwing process of the suture nail.

The embodiment of the present application provides a laser ablation catheter, which comprises a laser fiber bundle, an adjustable head, an outer tube, a sleeve and a connector; the outer tube wraps the laser fiber bundle; the adjustable head comprises an adjustable support made of a shape memory material and sleeved at one end of the outer tube; the connector is connected to the other end of the outer tube, and the laser fiber bundle can be connected to a laser generator through the connector; the sleeve is sleeved outside the adjustable support and used for compressing the adjustable support; at least one end of the adjustable support is a movable end, and the movable end is slidingly connected to the outer tube; when the sleeve is removed, the movable end provides a condition for the deformation of the adjustable support. The laser ablation catheter is kept in the center of a target blood vessel through the adjustable head, so that the laser is concentratedly irradiated to a lesion position and the adverse effect on a blood vessel wall is reduced.

A tissue cutting device is disclosed that allows for in-plane rotation of a distal end to avoid gross movements during surgical procedures. In one exemplary arrangement, the tissue cutting device comprises a housing, an outer cannula, and an inner cannula. The outer cannula is mounted for rotation to the handpiece. The inner cannula is mounted within the outer cannula and mounted for rotation with the outer cannula. Both the inner and outer cannula are provided with relieving cuts that are offset from one another.

The utility model discloses a forceps head actuating mechanism of sampling forceps. The forceps head actuating mechanism comprises a fixed handle and an outer sleeve, the outer sleeve is fixedly connected to the fixed handle through the rubber coating body; wherein the rubber coating body is fixedly connected with the tail end portion of the outer sleeve in a sleeved mode, a positioning mechanism is arranged between the rubber coating body and the fixed handle, and the positioning mechanism is suitable for limiting the axial position of the rubber coating body in the axial direction of the outer sleeve and / or the circumferential position of the rubber coating body in the circumferential direction of the outer sleeve relative to the fixed handle. It can be ensured that the outer sleeve and the fixed handle are firmly limited and fixed together, and the position precision of connection of the outer sleeve and the fixed handle is ensured.

The utility model discloses a centrum puncture biopsy needle which comprises an outer tube structure, the outer tube structure comprises an outer sleeve, the outer sleeve is provided with an outer tube handle, the outer tube handle is provided with a main installation opening communicated with the outer sleeve, and the outer sleeve can be spliced with an inner core structure or an inner tube structure; the inner core structure comprises a puncture cone, a cone handle is arranged at one end of the puncture cone, and the cone handle is connected with the outer tube handle through an assembling assembly; according to the puncture device, tissue sclerotin can be effectively cut off, sclerotin tissue can be cut into the inner sleeve, target sclerotin can be conveniently extracted, the problem that an existing puncture device cannot accurately extract the target sclerotin is solved, positioning and assembling can be conducted, the precision during assembling is improved, and the puncture device is convenient to use. The precision of sampling operation is ensured, and the use is convenient.