111 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.

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 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.

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.

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 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 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.

The present application relates to intervertebral fusion holder medical instrument technology field, specifically speaking, a kind of holder and holding method, the holder includes screw rod, inner sleeve, outer sleeve, knob, locking block, the front end of the outer sleeve is equipped with with the inner support block of fusion ware middle clamping connector, the outer sleeve is equipped with inner sleeve, inner sleeve and outer sleeve sliding do not rotate connection, inner sleeve rear end stretches out outer sleeve and is connected with knob screw, the rear end surface of inner sleeve is equipped with fixed tooth, screw rod is inserted into inner sleeve, the front end of screw rod stretches out outer sleeve, the rear end of screw rod stretches out inner sleeve and is equipped with locking block, the front end surface of the locking block is equipped with with the locking tooth of fixed tooth meshing, by the assembly of holder, fixed inner support block, fixed outer expansion block, locking, inner support block advance, disengage, bone grafting etc. Step is used, with simple structure, holding effect is good, holding operation is simple, and it has advantages such as improving bone grafting efficiency.

The invention discloses an ultrasonic scalpel negative pressure suction device, and relates to the technical field of negative pressure suction, the ultrasonic scalpel negative pressure suction device comprises a pipeline part, a moving part and a matching part, in the working process of an ultrasonic scalpel, an operator can control the device with one hand, the device is connected with an existing negative pressure center through a branch pipe, generated smoke is sucked, and the surgical field is prevented from being blocked; after one stage of work of the ultrasonic knife is completed, the shifting handle is shifted, under the condition that the tail tube and the ultrasonic knife cannot move, the main tube can stretch out forwards through the outer sleeve and the inner sleeve, exceed the front end of the ultrasonic knife and directly act on a focus position to complete suction work, and two tools, namely the ultrasonic knife and the suction tube do not need to be controlled by two hands respectively.

A drainage tube assembly with an inner sleeve for flushing relates to the technical field of medical instruments and comprises an outer sleeve and the inner sleeve, the head of the far end of the outer sleeve is closed inwards in an arc shape, a plurality of side holes used for draining seepage are formed in the tube wall of the far end of the outer sleeve, a drainage bag connector and a manifold communicated with a tube cavity of the drainage bag connector are arranged at the near end of the outer sleeve, and the manifold is communicated with the drainage bag connector. A steering strip is fixed in a far-end tube cavity of the outer sleeve, a cross-shaped silica gel valve is arranged at a manifold opening, a pull rope is wound on the steering strip, the two ends of the pull rope penetrate through the cross-shaped silica gel valve and extend to the outside of the manifold, a pull ring is fixed to one end of the pull rope, the other end of the pull rope is fixedly connected with the inner sleeve, the inner sleeve is provided with two tube cavities, and the two tube cavities are communicated with each other. The two cavities are respectively a liquid inlet cavity and a liquid extraction cavity. The assembly provided by the utility model is suitable for clinical drainage.

The invention discloses a pipeline elbow protection system and a working method thereof. The pipeline elbow protection system comprises a protection sleeve and a bending sensor. The protective sleeve comprises an inner sleeve and an outer sleeve shell, the elbow is sleeved with the inner sleeve, the inner sleeve is tightly attached to the outer wall of the elbow, a buffering cavity is formed between the outer sleeve shell and the inner sleeve, and a supporting frame and a buffering base body are arranged in the buffering cavity; the support frame has bending deformation in the buffer cavity, the buffer cavity is provided with an open port communicated with the outside, and the bending sensor is connected with the support frame through the open port; a locking assembly is arranged on the outer sleeve shell, and when the locking assembly is loosened, the bending sensor can measure the bending change of the supporting frame. The supporting frame is composed of a plurality of separating rings and a plurality of connecting ribs, and the extending direction of the connecting ribs is consistent with the extending direction of the elbow. The support frame with bending deformation is arranged in the protective sleeve, and the bending change of the support frame is detected through the bending sensor, so that whether the protective sleeve is loosened or not is judged.

The invention relates to the technical field of tip caps, in particular to a tip cap of a digestive endoscopy, which comprises an endoscope lens, an auxiliary tube is fixedly arranged on one side of the endoscope lens, the height of the auxiliary tube is lower than that of the endoscope lens, an inner sleeve is mounted on the outer surface of the endoscope lens in an inserting manner, and the inner sleeve is sleeved on the outer surface of the endoscope lens. An outer soft end cap is installed outside the inner sleeve in an inserted mode, and a buckle extrusion mechanism is arranged between the outer soft end cap and the inner sleeve. According to the tip cap of the digestive endoscope, when the tip cap is installed, the inner sleeve needs to be inserted into the endoscope head in advance, the inner plastic sleeve is inserted into the inner sleeve, the inner sleeve can be extruded and deformed by the inner plastic sleeve, the anti-skid tooth points can be inserted into the outer surface of the endoscope head so as to increase firmness, and the positioning teeth and the inner plastic sleeve are clamped so that the tip cap can be installed conveniently. The inner sleeve and the inner plastic sleeve can be fixed together, the outer soft end cap can be firmly fixed to the outer surface of the endoscope head, and the possibility that the outer soft end cap falls off in the using process is reduced.

The invention discloses a device for removing a residual titanium clip under an endoscope. The device comprises an operating handle, an outer sleeve, an inner sleeve and a rotating handle, the outer sleeve is movably mounted at the front end of the operating handle, and the inner sleeve is sleeved with the outer sleeve; the front-back movement of the outer sleeve is controlled by rotating the rotating handle to control the movement of the opening and closing head, the front end of the titanium clip can be extruded open in an extrusion mode, a traditional direct pulling-out mode is replaced, and damage to internal tissue can be reduced to a great extent while the titanium clip is pulled out; and through fixing of the air bag, the pulled-out titanium clamps can be removed, the whole device does not need to be taken out for multiple times and then placed in, and when multiple detained titanium clamps exist, the titanium clamps can be continuously taken out. The loosened titanium clamp can be directly taken out through the taking-out pipe, and convenience and practicability are achieved.

A joint fusion preparation assembly having a self-centering, non-rigid, "floating"cutting blade deployable to a target site in a minimally invasive procedure is disclosed herein. The joint fusion preparation assembly includes an outer cannula or access conduit, an inner sleeve, a cutter component, and a bone drill component. The outer cannula includes a distal abutment surface configured to register the distal end of the outer cannula against a bony surface and a spring-loaded locking element configured to securely engage with the inner sleeve to maintain the inner sleeve at a desired position. The inner sleeve is configured for insertion into the outer cannula and includes a spring-loaded locking element configured to securely engage with the cutter component and / or the bone drill component to maintain the cutter and / or bone drill in a desired position during use.