196 results about "Inner Cannula" patented technology

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 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 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.

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 pediatric infant tracheal foreign body taking-out device in the technical field of pediatric oral cavities, which comprises foreign body forceps and an endoscope, and further comprises an inflatable outer pipe sleeve, an inner sleeve is arranged in the outer pipe sleeve, and a plurality of connecting rods are arranged between the inner sleeve and the outer pipe sleeve. Two ends of the connecting rod are fixedly connected with the outer wall of the inner sleeve and the inner wall of the outer sleeve respectively; a plurality of annular grooves are formed in the outer wall of the outer pipe sleeve in a linear array mode in the axis direction, liquid collecting grooves are formed in the inner bottom walls of the annular grooves in the circumferential direction, and a plurality of first adsorption holes are formed in the inner side walls of the liquid collecting grooves in an annular array mode. Friction force between the expanded outer pipe sleeve and the trachea of the infant is increased through the annular groove, meanwhile, when secreted liquid in the liquid collecting groove is sucked through the first adsorption holes, certain negative pressure is formed in the annular groove, the stabilizing force between the inner wall of the trachea of the infant and the outer wall of the outer pipe sleeve is further increased, and therefore the situation that the outer pipe sleeve slides due to disordered movement of the child is reduced; and the foreign body forceps fall off the protection range.

The present invention relates to a balloon dilator system (1500), comprising: a balloon pump hand piece (1573) configured to pump pressurized fluid through a flexible tube to inflate an inflatable balloon, the balloon pump hand piece (1573) comprising: an attachment mechanism for removably coupling the balloon pump hand piece (1573) to a proximal end of an endoscope; the flexible tube, wherein the flexible tube is configured to be in fluid communication with the balloon pump hand piece (1573) at a first end of the flexible tube, and the inflatable balloon at a second end of the flexible tube; a hollow inner cannula; and the inflatable balloon, wherein the inflatable balloon is external to and circumferentially attached to the hollow inner cannula between the proximal end of the hollow inner cannula and the distal end of the hollow inner cannula.

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 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.

The invention relates to a disposable medium-length catheter for peripheral puncture. Compared with a traditional indwelling needle, the medium-length catheter is a soft catheter that can be inserted into a blood vessel to a longer length and will not puncture or damage the blood vessel. Therefore, the catheter has a longer service life and is safer. The medium-length catheter is provided with a main sleeve and a combined sleeve that are connected to each other. The catheter is slidably connected in the main sleeve, the puncture needle is fixed to the lower end of the inner sleeve of the combined sleeve and extends into the catheter, and the guide wire is connected to the outer sleeve of the sleeve assembly through a traction sleeve and extends into the puncture needle. Therefore, the guide wire, the puncture needle and the catheter are combined into a whole, and one person can continuously complete the operation of inserting the catheter. Therefore, the invention is easy to operate and use, improves the efficiency of inserting the catheter and reduces the burden on doctors.

The embodiment of the utility model provides a nasopharynx flusher with an inner sleeve structure, and relates to the technical field of flushers, the nasopharynx flusher comprises a main machine and a bottom shell, the bottom shell is installed on the bottom surface of the main machine, a fixing pipe is fixedly connected to the top surface of the main machine, a connecting pipe connected with the main machine is fixedly connected to the fixing pipe, and the connecting pipe is connected with the inner sleeve structure. A first lens is fixedly connected in the fixing pipe, a camera is fixedly connected to the side wall of the fixing pipe, and an inner sleeve is arranged in the fixing pipe in a sleeved mode. During use, one end of the inner sleeve is inserted into the nostril of a patient, the lamp bead is turned on, the flushing function can be achieved during operation of the main machine, in the flushing process, light is reflected to the first lens through the second lens, the camera is used for shooting the first lens, and the shot picture is displayed on the display screen; at the moment, an operator can visually observe the flushing condition through a display screen, and the accuracy and convenience of flushing the nasopharynx of the patient are improved.

The invention relates to a low-temperature vacuum straight pipe self-adaptive to fluid pressure and a preparation method thereof.The vacuum straight pipe comprises an inner pipe and an outer pipe, the inner pipe is made of low-expansion alloy steel 4J36, the outer pipe is made of stainless steel, a left sealing piece and a right sealing piece are correspondingly welded between the left end and the right end of the outer pipe and the inner pipe, and a vacuumizing connector is welded to the outer pipe in a sealed mode; the left inner sleeve and the left outer sleeve are coaxially arranged in a sleeved mode, the left inner supporting ring is welded to the right ends of the left inner sleeve and the left outer sleeve in a sealed mode, the left end of the left inner sleeve is welded to the inner pipe in a sealed mode, and the left end of the left outer sleeve is welded to the outer pipe in a sealed mode through a left outer supporting ring. The right inner sleeve and the right outer sleeve are coaxially arranged in a sleeved mode, the right inner supporting ring is welded to the left ends of the right inner sleeve and the right outer sleeve in a sealed mode, the right end of the right inner sleeve is welded to the inner pipe in a sealed mode, and the right end of the right outer sleeve is welded to the outer pipe in a sealed mode through the right outer supporting ring. The preparation method has the advantages of simple process and convenience in operation.

The utility model relates to a sputum receiving device of a medical tracheostomy cannula, which belongs to the technical field of medical instruments and comprises an outer cannula and an inner cannula, the inner cannula is inserted into the outer cannula in a sliding manner, one end of the inner cannula far away from the outer cannula is connected with a collecting tube, and connectors are mounted on the outer sides of the collecting tube and the inner cannula. The side, away from the inner sleeve, of the collecting pipe is connected with a sputum receiving bin, the bottom of the sputum receiving bin is communicated with a sputum discharging pipe, the bottom of the sputum discharging pipe is communicated with a sputum storage bin, the bottom of the sputum storage bin is communicated with a sputum outlet pipe, a first valve is installed on the sputum discharging pipe, and a second valve is installed on the sputum outlet pipe. After sputum is collected into the sputum receiving bin, the first valve is opened under the condition that the second valve is closed, the sputum enters the sputum storage bin firstly, in this way, when sputum is discharged, the sputum cannot be sprayed out of the sputum discharging opening even if a patient suddenly coughs, after the sputum enters the sputum storage bin, the first valve is closed, and when the patient coughs again, the accumulated sputum cannot be leaked out of the ventilation opening; the operation environment is ensured.

A needle assembly includes an elongate cannula including an outer lumen defining a first channel and having a plurality of outer lumen ports, the plurality of outer lumen ports being arranged in a plurality of outer rings about the outer lumen in a circumferential direction, and each of the plurality of outer rings being spaced from one another in a longitudinal direction. The needle assembly further includes an inner cannula disposed within the outer lumen and including an inner lumen defining a second channel and having a plurality of inner lumen ports, the plurality of inner lumen ports being arranged in a plurality of inner rings about the inner lumen in the circumferential direction, and each of the plurality of inner rings being spaced from one another in the longitudinal direction. The plurality of outer rings and the plurality of inner rings are aligned in the longitudinal direction.

To provide a favorable apparatus and the like.SOLUTION: An apparatus for delivering a vascular arteriovenous graft includes a tubular sleeve 44 defining an internal lumen adapted to be slidably disposed over a tunneling instrument 42. Upon advancement of the tunneling instrument to a desired subcutaneous anatomical location, a shaft is removed while the sleeve remains in a tissue. The sleeve has a linear slit 58 extending from a proximal end to a midpoint of the length of the sleeve. The lumen receives a distal end of the graft and at least a portion of a cannulation chamber. An end portion of the sleeve gradually expands along the slit, providing an enlarged diameter to accommodate the cannulation chamber. A longitudinal force applied to the sleeve from the tissue when the sleeve is removed from the tissue, fixes the graft within the sleeve by radial compression of the sleeve, and the graft and the sleeve are pulled through the tunnel to deploy the vascular graft.SELECTED DRAWING: Figure 8

An arthroscopic cutting probe includes an outer sleeve having a longitudinal bore and an outer cutting window at its distal end. An inner sleeve is rotationally disposed in a bore of the outer sleeve, and the inner sleeve has a distal end, a proximal end, a longitudinal passageway, and an inner cutting window at its distal. An active electrode sleeve is disposed on an outer surface of the inner sleeve in a position opposed to the inner cutting window. Rotation of the inner sleeve relative to the outer sleeve causes the inner cutting window to rotate past the outer cutting window to resect tissue received through the cutting windows as they pass each other. Radiofrequency current can be applied to the active electrode to enhance tissue cutting then the cutting windows are being rotated or to able or cauterize tissue when the cutting windows are held stationary with the active electrode disposed through the outer cutting window.

An apparatus includes a body and an outer cannula extending distally from the body along a longitudinal axis and fixedly secured to the body. The outer cannula includes a proximal portion having a first cross-dimension and a distal portion having a second cross-dimension smaller than the first cross-dimension. The distal portion is configured to guide the cylindrical proximal portion into a trocar port. The apparatus also includes an inner cannula slidably disposed in the outer cannula for translating longitudinally relative to the outer cannula. The inner cannula includes an open proximal end, an open distal end configured to pierce a retina of the eye, and a lumen extending between the open proximal end and the open distal end. The lumen is configured to communicate a fluid from the open proximal end to the open distal end for delivering the fluid into a subretinal region of the eye.

The utility model relates to the field of medical equipment, in particular to a metal tracheal cannula capable of being connected with a breathing machine, which comprises a metal cannula, a connector arranged at one end of the metal cannula, a metal inner cannula mounted in the metal cannula and used for being connected with the breathing machine, and a connecting ring mounted on the periphery of one end of the metal inner cannula. The metal inner sleeve is provided with a fixing assembly used for fixing the metal inner sleeve in the metal sleeve. Through the matching design of the metal sleeve, the metal inner sleeve and the connector, a connection mode which is stable in structure and convenient to operate is provided, the metal inner sleeve is fixed in the metal sleeve through the fixing assembly, stability and strength of connection are ensured, and in addition, due to the design of the heating pipe on the fixing ring, the heating efficiency is improved. And the heating pipe is connected with the heating and humidifying functions of the breathing machine, so that gas in the pipeline can be conveniently heated and humidified.

The utility model belongs to the field of medical equipment, and particularly relates to an implant conveying system as well as an inner tube assembly and a conveying component thereof. The inner tube assembly includes: an inner tube; the inner sleeve is arranged outside the inner pipe in a sliding and sleeving manner; the tube sleeve is connected to the outer part of the near end of the inner sleeve; the inner tube protection structure is fixedly arranged outside the near end of the inner tube in a sleeving mode, and the inner tube protection structure is located between the tube sleeve and the inner tube so that an anti-bending tube layer with the preset axial length can be formed at the near end of the inner tube. According to the utility model, the inner tube protection structure is arranged outside the near end of the inner tube, so that supporting force can be provided for the near end of the inner tube, and the inner tube is prevented from being bent in the implant conveying process, particularly in the inner tube withdrawing process.

The utility model discloses a centrum focus tissue sampling device which comprises an outer sleeve and an inner sleeve and further comprises an inner core sampling structure, the inner sleeve is clamped in the outer sleeve and can be disassembled and assembled, the inner core sampling structure is movably arranged in the inner sleeve, and the inner core sampling structure is connected with the outer sleeve. The inner core sampling structure is matched with the inner sleeve to rotate to sample focus tissues; the inner core sampling structure comprises an inner core rod, a sampling rod is arranged on one side of the inner core rod, a cone part is arranged at the end of the sampling rod, and a threaded tip is arranged on the sampling rod. By adopting the closed structure of the inner core sampling structure and the inner sleeve, the sampling of the focus tissue is facilitated, the focus tissue at the same part can be sampled for multiple times, the operation is convenient, and the replacement and sleeve connection are not needed.

This utility model discloses a multi-segment gradient telescopic needle gauge, including a housing handle with a blind hole at one end, within which a needle gauge assembly is housed. The needle gauge assembly includes an outer tube, inside which multiple inner tubes are sequentially fitted. The inner tubes can extend and retract axially within the outer tube, and the outer tube can also extend and retract axially within the housing handle. A first and second sliding groove are axially offset on the side wall of the housing handle, and a connecting groove is provided on the side wall of the housing handle. A locking block is provided on the side wall of the outer tube, with one end extending out of the housing handle. The locking block can slide within the first and second sliding grooves, and can abut against the end faces of the first and second sliding grooves respectively. A single needle gauge in this utility model can cover multiple sizes, reducing changeover time and making it easy to carry. Furthermore, it eliminates the need for external tools, allowing for size switching with one hand, thus improving operational convenience.

The present invention relates to a root tissue ligation device, comprising a telescopic component, a ligation component and a wire take-up rod, the ligation component comprising a ligation sleeve, a ligation line, a positioning bolt and a knot pusher, the positioning bolt is arranged at the front end of the telescopic end of the telescopic component, the length of the telescopic component is retractable, the front end of the ligation sleeve is arranged in an annular manner and both ends are fixed to the front end of the positioning bolt, a ligation line fixing groove is provided on the inner side of the ligation sleeve, one end of the ligation line is wound around the middle of the ligation line to form an upper hanging knot, so that the front end of the ligation line is surrounded to form a loop, the loop is arranged in the ligation line fixing groove, the rear end of the ligation line passes through the positioning bolt and is connected to one end of the wire take-up rod, the wire take-up rod is arranged in the telescopic component, and the other end of the wire take-up rod is exposed outside the inner sleeve. The present invention has a simple structure and a low manufacturing cost, and can ligate root tissue (such as auricle) with a small wound and low risk.

This invention discloses an anti-fog and heat-insulating puncture device for thoracoscopic surgery, belonging to the field of medical device technology. Its key technical features include: an outer sheath, with a puncture assembly on its inner wall, the puncture assembly including a puncture needle core that slides through the inner wall of the outer sheath, a needle core handle fixedly connected to the upper end of the puncture needle core, a needle tip fixedly connected to the lower end of the puncture needle core, an outer sheath seat fixedly connected to the upper outer wall of the outer sheath, a fixing handle fixedly connected to the outer wall of the outer sheath seat, and a sealing assembly on the outer wall of the outer sheath seat. This invention achieves heat insulation through a double-layer structure formed by the outer and inner sheaths; gas circulation is formed through the cooperation of the air inlet and outlet holes, effectively expelling fog from the inner wall of the inner sheath and ensuring a clear surgical field; the sealing valve and sealing sleeve achieve internal sealing of the outer sheath to prevent gas leakage; the sealing ring is precisely positioned by positioning pins and positioning holes, and the sealing cap is stably installed by locking blocks and protruding pins, providing double sealing to prevent gas leakage and impurity entry, reducing the risk of infection.

The invention is directed to a catheter (1) for injecting a cell suspension into an organism comprising an outer canula (2) and an inner canula (3) characterized in that - the inner canula (3) is designed to be inserted into the outer canula (2) and the inner canula (3) is axially and / or rotationally movable in the outer canula (2) - the catheter is provided with a tapered shaped tip (4), - the outer canula (2) and / or the inner canula (3) is provided with at least one radial opening from which a cell suspension is injected into the organism.

The invention provides an endoscope cleaner capable of circularly cleaning in-cavity sealing fluid, which comprises a sealing upper cover, a fixed seat, an inner sleeve and an outer sleeve, and is characterized in that the sealing upper cover and the fixed seat are connected through a reverse buckle arranged on the sealing upper cover and a hidden clamping groove arranged on the fixed seat; the inner sleeve is upwards supported by the outer sleeve, so that the inner sleeve is embedded and connected into the middle hole of the fixed seat; the outer sleeve is connected with the fixing seat through a plurality of clamping teeth evenly distributed in the circumferential direction of the top end of the outer sleeve and a clamping groove in the fixing seat. According to the endoscope cleaner capable of achieving circulating cleaning through the sealed fluid in the cavity, the number of parts of the whole structure is greatly reduced, main components are connected through a buckle structure, and therefore the problems that the welding process is low in efficiency and high in manufacturing cost are solved, the sealing performance after connection can be ensured, and through the reasonable structural layout, the sealing performance of the endoscope cleaner is improved. And the connection stability and the structural strength are improved.

The present application provides a high-performance implantable infusion port, which includes a puncture seat, a puncture membrane, a venous catheter and a catheter lock, wherein the top of the puncture seat is concave to form a liquid storage cavity; the puncture membrane is connected to the top of the port seat and covers the liquid storage cavity; the venous catheter is connected to the liquid storage cavity; the catheter lock is provided with a through hole along the axial direction, one end of the catheter lock is connected to the puncture seat, and the other end thereof is connected to the venous catheter, so that the venous catheter is connected to the liquid storage cavity; wherein the venous catheter includes an inner sleeve and an outer sleeve, and the inner sleeve or the outer sleeve is connected to the catheter lock; the outer sleeve is arranged on the outside of the inner sleeve, and its two ends are connected to the side walls of the inner sleeve, so that the outer sleeve and the inner sleeve form a sealed cavity, and the sealed cavity is provided with filling gas to solve the technical problem that the existing venous catheter is prone to bending and clogging, thereby causing non-thrombotic clogging.

The utility model relates to the technical field of puncture extraction equipment, in particular to puncture extraction equipment which comprises an outer sleeve, an outer needle tube is connected to the front end of the outer sleeve, an opening is formed in the rear end of the outer sleeve, an inner sleeve is arranged in the outer sleeve in a front-back moving mode, an inner needle tube is connected to the front end of the inner sleeve, and an opening is formed in the rear end of the inner sleeve. The front end of the inner needle tube is movably arranged in the outer needle tube back and forth, a piston is arranged in the inner needle tube, the rear side of the piston is connected with a push rod, and the rear end of the push rod is arranged behind the outer sleeve; a long-strip-shaped hole penetrating through the inside and the outside is formed in the outer sleeve in the front-back direction, a push handle is installed on the outer wall of the inner sleeve, and the end, away from the inner sleeve, of the push handle penetrates through the long-strip-shaped hole to be arranged on the outer side of the outer sleeve. The problem that in the prior art, after the outer wall of a needle tube of a puncture needle makes contact with cancer cells, the cancer cells are driven to make contact with healthy cells in the needle pulling process, and therefore the risk of cancer cell diffusion exists is solved.