596 results about "Outer Cannula" patented technology

The invention discloses an insertion part, an endoscope and a recovery method of a bent tube, and relates to the technical field of medical instruments. The insertion part disclosed by the invention is used for an endoscope. The insertion part comprises a front end assembly, a bent pipe, a lining pipe and an outer sleeve, the front end assembly is installed at the far end of the outer sleeve, the lining pipe and the bent pipe are both arranged in the outer sleeve in a penetrating mode, and the bent pipe is installed between the front end assembly and the lining pipe in a limited mode in the axial direction of the insertion part; at least one of the front end assembly and the lining pipe is detachably connected with the outer sleeve and used for allowing the bent pipe to retreat from the outer sleeve after the front end assembly or the lining pipe is detached from the outer sleeve. The scheme at least can be used for solving the problem that an existing endoscope is high in use cost.

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 invention provides a radiofrequency ablation catheter and a radiofrequency ablation system. The radiofrequency ablation catheter comprises a balloon, an inner tube, a guide wire tube, an outer sleeve and a radiofrequency electrode, the near end of the balloon is provided with a near-side tube section extending along the longitudinal axis of the balloon; the inner tube is provided with an inflation cavity and a guide wire tube penetrating cavity which are not communicated with each other, the far end of the inner tube is inserted into the near-side tube section, the inner tube is in sealed connection with the near-side tube section, and the far end of the inflation cavity is communicated with an inner cavity of the balloon; the far section part of the guide wire tube extends out of the far end of the guide wire tube penetrating cavity and extends to an inner cavity of the balloon, and the guide wire tube is in sealed connection with the guide wire tube penetrating cavity; the outer sleeve is arranged outside the inner tube in a sleeving mode, the far end of the outer sleeve is connected with the near-side tube section, a gap is formed in the joint, and a threading cavity between the outer sleeve and the inner tube is used for containing a cable; the radio frequency electrode is provided with a far-side ablation area and a near-side wiring area connected with the cable, extends to the gap from the near-side wiring area to the far-side ablation area along the threading cavity, penetrates out of the gap and then is attached to the surface of the near-side pipe section to extend to the outer surface of the balloon.

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.

The invention discloses a multifunctional flushing aspirator and a using method thereof, and relates to the technical field of medical instruments. The external pipeline mechanism is arranged in the handle, is connected with an external flushing device and a negative pressure device, and is used for switching flushing operation or suction operation; one end of the flushing suction tube is installed on the handle, the end, connected with the handle, of the flushing suction tube is communicated with an external pipeline mechanism, and the flushing suction tube is driven by the external pipeline mechanism to flush and suck a designated position; the flushing suction tube is sleeved with the outer sleeve in a sliding mode, one end of the outer sleeve is installed on the handle through a first telescopic mechanism, and the other end of the outer sleeve is provided with a screen part. While the flushing suction tube is used for realizing full-effect suction of liquid, the flushing suction tube can extend out of the screen part of the outer sleeve when needed so as to realize the effect of preventing blockage during suction.

The invention discloses an adjustable bending clip applier which comprises a control device, a clip rod arranged on the control device and a clip head device arranged on the clip rod, the clip rod comprises an outer sleeve, a rotating base arranged on the clip head device and connected with the outer sleeve, a mandrel and a steel cable, and the mandrel and the steel cable are arranged in the outer sleeve. The control device comprises an adjusting assembly, the two ends of the mandrel are rotationally connected with the tong head device and the adjusting assembly respectively, the mandrel is used for controlling opening and closing of the tong head device, the two ends of the steel cable are connected with the rotating base and the adjusting assembly respectively, and the steel cable is used for controlling bending adjustment of the tong head device. Compared with the prior art, the bending-adjustable forceps head device has the advantages that the moving range of the forceps head in the cavity is increased in the clinical use process, aiming at complex lesions in a narrow space area, a doctor can conveniently adjust the angle, the operation time is shortened, and the operation efficiency is greatly improved.

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 belongs to the technical field of medical instruments, and provides a surgical robot which comprises an outer sleeve. The snake bone pipe is separably arranged in the outer sleeve in a penetrating manner; the tail end instrument is arranged at the far end of the snake bone tube, and the tail end instrument can penetrate through the outer sleeve along with the snake bone tube to enter a target cavity; the multiple traction ropes are located in the snake-bone pipe, and one end of each traction rope is at least located at the far-end position of the snake-bone pipe; the limiting parts are sequentially arranged in the snake bone pipe in a penetrating mode, each limiting part is provided with a plurality of penetrating holes, and the penetrating holes are used for the traction ropes to penetrate through so that the traction ropes can be limited in the limiting parts. The multiple limiting pieces are arranged in the snake-bone pipe, the penetrating holes are formed in the limiting pieces, so that the multiple traction ropes passing through the snake-bone pipe can penetrate through the limiting pieces, and the multiple traction ropes can be arranged in a separated mode through the limiting pieces; therefore, the situation that the multiple traction ropes are stacked and intertwined when the snake bone pipe is in a bent state is avoided.

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 rotary-cut biopsy needle transmission structure comprises an outer sleeve of a linear structure, the tool bit end of the rotary-cut biopsy needle transmission structure coaxially penetrates through a rotary-cut tool tube in the outer sleeve, and the rotary-cut tool tube is in clearance fit with the outer sleeve; the hollow screw rod is coaxially and fixedly arranged at the position, away from the outer sleeve, of the rotary cutting knife tube in a sleeving mode, the hollow screw rod is coaxially sleeved with a linear driving gear, and the linear driving gear is in threaded fit with the hollow screw rod; one end of the hollow screw is coaxially sleeved with a rotary driving gear, and an inner pipe of the rotary driving gear is in sliding fit with the hollow screw in the axial direction of the rotary driving gear and is fixedly clamped with the hollow screw in the rotating direction of the rotary driving gear; during use, the linear driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to linearly move along the axis of the hollow screw rod and the rotary cutter pipe; and the rotary driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to rotate around own axes. The rotary cutting knife tube is driven to move in the mode, the structure is simple, transmission is stable, the operation risk can be reduced, and the operation success rate is increased.

The invention discloses an electric anastomat with a novel bending mechanism. The electric anastomat comprises a cannula module and a bending mechanism, a device body module; the rotating module is arranged on the periphery of the near end of the sleeve module and comprises a rotating shell and a bending mechanism installed on the rotating shell, a steering rod is arranged between the outer sleeve and the inner sleeve, the near end of the steering rod is in transmission connection with the bending mechanism, and the far end of the steering rod is movably connected with the steering control mechanism; the bending mechanism comprises a bending driving sliding block in axial sliding fit with the outer sleeve, a bending gear connecting rod rotationally arranged on the rotating shell, a bending driving assembly driving the bending gear connecting rod to rotate and a driving sliding shaft connecting the bending driving sliding block and the bending gear connecting rod. The driving sliding shaft is driven by the bending gear connecting rod to move in the axial direction of the outer sleeve, and the near end of the steering rod is fixedly connected with the bending driving sliding block. According to the electric anastomat with the novel bending mechanism, bending operation is convenient and fast, safety and reliability are achieved, and operation safety is improved.

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 invention relates to the field of medical instruments, in particular to a postoperative effusion drainage device which comprises an outer sleeve, an inner sleeve, a supporting structure and a positioning plug. When the device needs to be used for abdominal cavity postoperative channel drainage, the supporting structure is in a closed state in an initial state, at the moment, the positioning plug plays a role in relatively fixing the inner sleeve at a port of the rear end of the outer sleeve, and the rear end of the inner sleeve is connected with a negative pressure drainage bag or an injector to suck or suck hydrops. When the device is conveyed to a preset position, the inner sleeve is forcibly pulled backwards, the inner sleeve axially moves backwards relative to the outer sleeve, the supporting structure is compressed, the middle section hunches outwards, and the interior of the channel is expanded; in the expanding and supporting process, when the supporting structure is in a negative pressure state, effusion in the suction channel is collected into the supporting structure, and under the negative pressure suction effect of the rear end of the inner sleeve, the effusion is continuously drained.

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.

Aspects of the present invention relate to a delivery device 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 movable 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.

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.

A surgical instrument, comprising a jaw assembly (100), a sleeve assembly (400), an angle turning member (210), an angle connection assembly, and a cutting blade assembly. The jaw assembly (100) is rotatably connected to the sleeve assembly (400); the cutting blade assembly comprises a blade bar (330); the angle connection assembly comprises a first angle connection member (140) and a second angle connection member (150); the surgical instrument further comprises a limiting assembly (300); the sleeve assembly (400) comprises an outer sleeve (420) and an inner sleeve (410); and the limiting assembly (300) comprises limiting members (310). The surgical instrument has a first state and a second state. In the first state, the limiting members (310) are position-limited by the outer sleeve (420) located at a proximal position and are separated from the second angle connection member (150) located at a straight position; when the outer sleeve (420) moves to a distal position, the limiting members (310) are released to move toward a distal end, so that the surgical instrument is switched to be in the second state; and the limiting members (310) are located on both sides of the second angle connection member (150) located at the straight position so as to stop the rotation of the second angle connection member (150).

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.

The utility model discloses a puncture outfit with a separable cannula component, which comprises a puncture outfit body, the puncture outfit body is composed of an obturator component, a cannula component and an outer cover component, the cannula component is connected with the outer cover component, and the obturator component is inserted into the cannula component and the outer cover component. The outer cover assembly is composed of a valve body, an outer cover, a sealing cover, a sealing ring and a duckbill, and the sleeve assembly is composed of a sleeve body, a sleeve large end, an outer sleeve and a sleeve pipeline. By designing a symmetrical slideway self-locking structure, disassembly and reassembly can become very simple, a doctor only needs to install the outer cover assembly and the sleeve together through left and right hand cooperation, and even does not need to align the position with eyes; the situation that the attention of a doctor is transferred from an endoscope display screen to disassembly and reassembly of the sleeve assembly is avoided, the doctor can pay attention to the operation condition through the endoscope display at any time, and the operation process is accelerated.

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 provides a radial artery radiography cannula, and relates to the technical field of medical instruments, the radial artery radiography cannula comprises an inner tube and an outer cannula, the inner tube comprises an inner tube catheter seat and an inner tube body, the outer cannula comprises an outer cannula catheter seat and an outer cannula body, the inner tube catheter seat is provided with a connector part, and the connector part can be connected with the outer cannula catheter seat in a matched mode. The inner tube body penetrates into the outer tube body, the outer tube and the inner tube can be locked and matched through the connector part and the outer tube catheter base, the adaptability is good, gas embolism or thrombus is not prone to being caused, the end of the middle cavity is sealed through the locking position, blood cannot overflow, and the influence on surgical operation is avoided; the inner tube and the outer tube are synchronous when a large blood vessel on an arch is subjected to super-selection, the outer tube and the inner tube are separated after the outer tube points to a target blood vessel, super-selection is conducted towards the far end to the target blood vessel under the support of the guide wire and the inner tube, the controllability of the catheter is improved, and the super-selection difficulty is reduced.