148 results about "Inner Cannula" patented technology

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 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.

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 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 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.

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 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.

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 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.

The perfused endoluminal suction inner cannula system for tracheostomy tubes can be a suction-powered system that can be used to suction tracheostomy tubes alone or in combination with rinsing and endoluminal suction, replacing traditional catheter-based endoluminal suction. The inner cannula contains chambers, or regions, and holes that facilitate endoluminal suction and irrigation at multiple locations within the tracheostomy tube. It can be applied / activated by the patient, a healthcare professional, a caregiver, or via an electronic system in either an inpatient / hospital or outpatient / ambulatory care setting, on an as-needed basis, or periodically or at set activation intervals.

An optical sleeve system may include a sleeve, a body, a first tube, a second tube, and a valve assembly. An outer sleeve wall may define an internal space extending along the axis of the sleeve. One or more inner sleeve walls within the outer sleeve wall may divide the internal space into a first channel and a second channel. A proximal portion of the sleeve may be received within the body. The first and second tubes may extend from the body. The valve assembly may 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 may 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 utility model relates to a medical drainage bag which comprises a drainage bag and a drainage tube, the tail end of the drainage tube is connected with the drainage bag, the drainage tube is connected with a sampling branch tube, the sampling branch tube is connected with a sampling bag through a sleeve, the sleeve comprises an outer sleeve and an inner sleeve, the inner wall of the outer sleeve is connected with a partition plate, a through opening is formed in the center of the partition plate, and a sampling valve is installed in the through opening. A driving valve rod is arranged in the inner sleeve; a positioning clamp is connected in the hanging hole and comprises a fixing sleeve internally provided with a cavity, one end of the cavity is connected with a positioning baffle, the other end of the cavity is connected with a limiting baffle, a compression spring is arranged between the positioning baffle and the limiting baffle, one end of the compression spring is connected with a sliding block, and the face, right facing the limiting baffle, of the sliding block is connected with a semi-arc clamping needle concentric with the fixing sleeve. The needle tip of the clamping needle sequentially penetrates through the limiting baffle and the positioning baffle. Drainage liquid can be sampled conveniently, meanwhile, the drainage bag and a bed sheet are fixed conveniently through the positioning clamp, safety is high, hands are not prone to being pricked, and using convenience is improved.

The grouting assembly of the grouting sleeve comprises the grouting sleeve, a grouting pipe is arranged at the bottom of one end of the grouting sleeve, a grouting device is installed on the grouting pipe, a grout outlet pipe is arranged on the portion, above the grouting pipe, of the grouting sleeve, and a plugging device is installed on the grout outlet pipe. Compared with the prior art, the utility model has the following beneficial effects: through the arrangement of the outer sleeve and the inner insertion pipe, when in use, the inner insertion pipe is accurately inserted into a grout outlet pipe or a grouting pipe, and meanwhile, the outer sleeve is tightly sleeved on the outer side of the grout outlet pipe or the grouting pipe, so that the design of the double-sealing structure is very exquisite, and the inner insertion pipe is tightly attached to the inner wall of a pipeline; and the outer sleeve is further wrapped from the outside to effectively prevent slurry from seeping, so that material waste caused by slurry leakage can be avoided, the cleanliness of a construction site environment can be ensured, and the difficulty of subsequent cleaning work is reduced.

The utility model relates to the technical field of medical instruments, and provides a turbinate blood taking needle guard which comprises a three-edged needle, and an inner sleeve used for fixing the three-edged needle is arranged on the outer side of the three-edged needle in a sleeved mode. According to the turbinate blood taking needle sleeve, a three-edged needle inserted into the inner sleeve can be more conveniently fixed through the clamping plate in the inner sleeve, the three-edged needle can be more conveniently replaced, the three-edged needle is driven by the inner sleeve to slide in the outer sleeve, the exposed length of the three-edged needle is adjusted, and due to the fact that tail thorns on the inner sleeve are clamped through the adjusting ring, the tail thorns can be conveniently fixed and replaced. When the adjusting ring slides on the outer sleeve, the inner sleeve can be driven to slide to a proper distance in the outer sleeve, and the adjusting ring can be fixed on the outer sleeve through the fixing assembly on the adjusting ring, so that the outward leakage length of the three-edged needle is fixed, and the distance of the three-edged needle in the outer sleeve through the inner sleeve can be checked through the visual window. The convenience of adjusting the push-out distance of the three-edged needle by the whole needle sleeve is improved.

The invention belongs to the technical field of medical instruments, and discloses an articular cavity continuous lavage device which comprises a double-cavity drainage perfusion assembly and a fixing lantern ring. The double-cavity drainage perfusion assembly comprises an inner sleeve, the outer side of the inner sleeve is coaxially connected with an outer sleeve in a sleeving mode, a drainage channel is defined between the outer wall of the inner sleeve and the inner wall of the outer sleeve, and a flow channel in the inner sleeve is a perfusion channel; a plurality of lateral micropores are formed in one end of the inner sleeve, the other end of the inner sleeve is detachably connected with the perfusion device through a first connector, and the end, away from the lateral micropores, of the drainage channel is detachably connected with a drainage bag through a second connector; the fixing lantern ring is arranged on the outer side of the outer sleeve in a sleeving mode, fixing wings are arranged on the two sides of the fixing lantern ring, and suture holes are formed in the fixing wings. The technical problems that a catheter of an existing lavage device is prone to being blocked, fixation is not firm, and the joint fluid drainage extraction efficiency is low are solved.

The utility model belongs to the technical field of internal heating acupuncture treatment equipment, and particularly relates to a novel nested internal heating acupuncture needle which comprises a needle seal, a needle handle and a needle body which are connected in sequence, the needle handle and the needle body are hollow and communicated with each other, heating wires are arranged in the hollow structures of the needle handle and the needle body, an inner sleeve is arranged between the heating wires and the needle body, and the inner sleeve is connected with the needle seal. One end of the heating wire is connected with the needle seal, and the other end is connected with the front end of the inner sleeve through a welding point I. The outer wall of the inner sleeve is connected with the inner wall of the needle body through a welding point II. According to the novel nested internal heating acupuncture needle, the stainless steel inner sleeve is additionally arranged between the heating wire and the needle body, so that the front end and the rear end of the heating wire are fixed, virtual connection between the heating wire and the pipe wall is avoided, and therefore it is guaranteed that a loop is formed all the time, and normal use of the product function is guaranteed.

A method of performing radiofrequency lesioning on a subject is provided. The method involves introducing an outer cannula and an inner cannula into the subject percutaneously, then guiding the outer cannula and inner cannula using neuronavigation, where the inner cannula is neuronavigation-compatible and the neuronavigation uses a navigated posterior clival line (nPCL) as an anatomic reference point. Then, removing the inner cannula from the outer cannula once the outer cannula and inner cannula are placed in a position for creating a lesion in the subject. Next, inserting an electrode into the outer cannula; and passing an electrical impulse through the electrode, causing a lesion in the subject.

The application relates to a blocking device, which comprises a first part, the first part comprising a plurality of braided wires and a convergence element, one end of the plurality of braided wires being fixed to the convergence element, the first part having at least one disc surface, the convergence element comprising a hollow and sleeved inner sleeve and outer sleeve, at least a part of the disc surface of the proximal end of the first part near the convergence element being perpendicular to the central axis of the convergence element, so that a relatively flat disc surface is formed near the convergence element. The blocking device of the application can form a relatively flat disc surface near the convergence element, that is to say, there is no obvious convex part on the surface of the disc surface, blood flow near the convergence element is prevented from forming a thrombus, and the safety of the blocking device is improved.

A single-port surgical device includes a housing and one or more cannulas. The housing includes a proximal port and a distal port, the one or more cannulas include an inner cannula section and an outer cannula section, the inner cannula section is located in the housing and communicates with the distal port of the housing, the outer cannula section is located outside the proximal port of the housing, and at least a portion of the outer cannula section of at least one cannula of the one or more cannulas is deformable in a radial direction, an axial direction or the radial direction and the axial direction of the outer cannula section.