Cannula for use with endoscopic blood vessel collection device

Abstract

A blood vessel collection device includes a handle and a cannula assembly extending distally from the handle. The sleeve assembly includes an outer tube having a flange and at least one insert extending within the outer tube. The at least one insert defines a tool path configured to receive a surgical tool therethrough, an endoscope path configured to receive a surgical endoscope therethrough, and an injection channel. The device also includes a cannula gasket disposed within the flange of the outer tube and defining a plurality of apertures, each aperture aligned with one of the tool path, the endoscope path, and the injection channel. The device also includes an injection tube extending from the handle through the cannula gasket and the injection channel.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 410,930, filed on September 28, 2022, the entire content of which is incorporated herein by reference. Technical Field

[0003] The present disclosure relates to organ harvesting devices, and more particularly to vascular harvesting devices having infusion and discharge features. Background Art

[0004] In endoscopic vascular harvesting (EVH) surgery, a slender surgical instrument can be advanced into an access path near the saphenous vein in a patient's leg, and the blood vessel can be dissected from adjacent tissue along the saphenous vein, and collateral blood vessels can be severed along the route of the blood vessel to be harvested. Similar techniques can also be used to harvest the radial artery or other target structures.

[0005] Examples of vascular harvesting devices are described in U.S. Patent No. 9,402,680 to Ginnebaugh et al. As described by Ginnebaugh et al., the vascular harvesting device can include features for guiding and filtering the smoke generated during the harvesting process. For example, a pressurized gas such as carbon dioxide (CO2) can be used to force the smoke towards a filter in the device handle.

[0006] In some known harvesting devices, the arrangement of the smoke channels can be prone to blockage by body fluids. In addition, the smoke may be generated at a rate that exceeds the capacity of the overall smoke channels and the smoke filter, thereby reducing visibility through the endoscope. Due to the reduced discharge flow, the accumulation of moist air also results in reduced visibility through the endoscope. Summary of the Invention

[0007] In summary, there is a need for a cannula device for a vascular harvesting system that can more effectively infuse the vascular harvesting area and discharge the exhaust gas.

[0008] Embodiments of the present invention relate to a cannula device for a blood vessel collection system. The cannula device includes a handle and a cannula assembly, which extends distally from the handle. The cannula assembly includes an outer tube having a flange and at least one inner cannula extending within the outer tube. The at least one inner cannula defines a tool path configured to receive a surgical tool therethrough, an endoscopic path configured to receive a surgical endoscope therethrough, and an injection channel. The cannula device also includes a cannula gasket, which is arranged within the flange of the outer tube and defines a plurality of orifices, each orifice being aligned with one of the tool path, the endoscopic path, and the injection channel. The cannula device also includes an injection tube extending from the handle through the cannula gasket and the injection channel.

[0009] In some embodiments, the gasket includes one or more posts that protrude distally from a distal surface of the sleeve gasket and interface with the outer tube to create a gap between the outer tube and the distal surface of the sleeve gasket.

[0010] In some embodiments, the gasket has a tapered sidewall that forms a fluid seal around an inner periphery of the flange of the outer tube.

[0011] In some embodiments, the at least one inner sleeve further defines a drain passage.The sleeve gasket further defines a drain aperture aligned with the drain passage.

[0012] In some embodiments, the cannula device further comprises a filter assembly housed within the handle to filter the exhaust gas. The filter assembly comprises an inlet tube extending at least partially into the exhaust aperture of the cannula gasket, a filter housing attached to a proximal end of the inlet tube, and a particle filter disposed within the filter housing.

[0013] In some embodiments, the filter housing comprises a shrinkable polymer.

[0014] In some embodiments, the particulate filter comprises a porous plastic embedded with carbon.

[0015] In some embodiments, the filter assembly is disposed within a filter chamber in the handle.

[0016] In some embodiments, the filter chamber defines a vent opening through which filter exhaust gases can flow to the atmosphere.

[0017] In some embodiments, the injection tube includes a small tube configured to be connectable to a gas source and a hypotube partially inserted into a distal end of the small tube.

[0018] In some embodiments, the handle includes a tool guiding channel for guiding the surgical tool to the tool path of the cannula assembly.

[0019] In some embodiments, the tool guiding channel includes a rib that terminates proximally of the cannula assembly.

[0020] In some embodiments, the rib includes a ramp having an inclined surface for guiding the surgical tool towards the cannula assembly.

[0021] In some embodiments, the rib is formed by a continuous section of material that extends distally within the handle.

[0022] In some embodiments, the cannula device further includes an endoscope that extends within the endoscope channel. The endoscope is movable between a retracted position in which the distal end of the endoscope is recessed within the cannula assembly and an extended position in which the distal end of the endoscope projects from the cannula assembly.

[0023] In some embodiments, the cannula device further includes a bell that extends from the proximal end of the handle. The proximal end of the endoscope is at least partially positioned within the bell such that the proximal end of the endoscope is accessible to an operator.

[0024] In some embodiments, the at least one inner cannula further defines an endoscope washing channel that is configured to receive an endoscope washing tube passing therethrough. The cannula gasket further defines an endoscope washing orifice that is aligned with the endoscope washing channel.

[0025] In some embodiments, the handle includes at least two sections that form an interference fit with the cannula assembly.

[0026] In some embodiments, the handle includes a cannula support structure that includes a first surface that engages the distal surface of the flange of the outer tube and a second surface that engages the proximal surface of the flange of the outer tube.

[0027] In some embodiments, the at least one inner cannula includes a first insert and a second insert. The tool path and the endoscope path are defined between the first insert and the second insert.

[0028] After reading the following detailed description of various examples in conjunction with the accompanying drawings, further details and advantages of the various examples described herein will become apparent. Description of the Drawings

[0029] Figure 1Is an exploded view of a cannula device for a vascular access system according to an embodiment of the present disclosure;

[0030] Figure 2 Is Figure 1 A side view of the handle section of the cannula device of;

[0031] Figure 3 Is Figure 1 A front view of the cannula device of;

[0032] Figure 4 Is along Figure 3 Line A-A of Figure 1 A lateral cross-sectional view of the cannula device of;

[0033] Figure 5 Is Figure 1 A side view of the cannula device of, with one handle section removed for clarity;

[0034] Figure 6 Is Figure 5 A detailed view of the cannula connector of;

[0035] Figure 7 Is Figure 1 A perspective view of the cannula device of;

[0036] Figure 8 Is Figure 1 A perspective cross-sectional view of the cannula device of, showing its cannula gasket;

[0037] Figure 9 Is Figure 1 A cross-sectional view of the cannula device of, showing its cannula gasket;

[0038] Figure 10 Is along Figure 3 Line B-B of Figure 1 A perspective cross-sectional view of the cannula device of;

[0039] Figure 11 Is Figure 1 A partial perspective view of the cannula device of, with one handle section removed for clarity;

[0040] Figure 12 Is according to an embodiment of the present disclosure Figure 1 A perspective view of the cannula gasket of the cannula device of;

[0041] Figure 13 Is according to an embodiment of the present disclosure Figure 1 A perspective view of the filter assembly of the cannula device of;

[0042] Figure 14 Is Figure 1Side view of the injection tube of the cannula device;

[0043] Figure 15 is Figure 1 Partial side view of the cannula device, where its endoscope is in the first position;

[0044] Figure 16 is Figure 1 Partial side view of the cannula device, where its endoscope is in the first position;

[0045] Figure 17 is Figure 1 Partial side view of the cannula device, where the endoscope is in the second position;

[0046] Figure 18 is Figure 1 Partial side view of the cannula device, where the endoscope is in the second position;

[0047] Figure 19 Perspective view of a surgical tool of a vascular harvesting system according to an embodiment of the present disclosure;

[0048] Figure 20 is according to an embodiment of the present disclosure Figure 1 Front perspective view of the cannula gasket of the cannula device;

[0049] Figure 21 is Figure 20 Rear perspective view of the cannula gasket; and

[0050] Figure 22 is according to an embodiment of the present disclosure Figure 1 Side view of the filter assembly of the cannula device. Detailed Description

[0051] For the purposes described below, the terms "upper", "lower", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "longitudinal" and their derivatives will refer to the present invention as oriented in the figures.

[0052] Spatial or directional terms such as "left", "right", "inner", "outer", "upper", "lower", etc. should not be considered limiting, as the present invention may assume various alternative orientations.

[0053] All numbers used in the specification and claims should be understood to be modified in all instances by the term "about". The terms "about", "approximately" and "substantially" refer to a range of plus or minus 10% of the stated value.

[0054] As used herein, the term "at least one of" is synonymous with "one or more of". For example, the phrase "at least one of A, B, and C" means any one of A, B, and C, or any combination of any two or more of A, B, and C. For example, "at least one of A, B, and C" includes one or more of A alone; or one or more of B alone; or one or more of C alone; or one or more of A and one or more of B; or one or more of A and one or more of C; or one or more of B and one or more of C; or one or more of all A, B, and C. Similarly, as used herein, the term "at least two of" is synonymous with "two or more of". For example, the phrase "at least two of D, E, and F" means any combination of any two or more of D, E, and F. For example, "at least two of D, E, and F" includes one or more of D and one or more of E; or one or more of D and one or more of F; or one or more of E and one or more of F; or one or more of all D, E, and F.

[0055] It should also be understood that the specific devices and processes shown in the drawings and described in the following specification are merely exemplary examples of the present disclosure. Accordingly, the specific dimensions and other physical characteristics associated with the embodiments disclosed herein should not be considered limiting.

[0056] When used in relation to a component of a surgical instrument, the term "proximal" refers to the portion of the component that is furthest from the surgical access site of the patient. When used in relation to a component of a surgical instrument, the term "distal" refers to the portion of the component that is closest to the patient or inserted into the patient's body.

[0057] As used herein, the term "surgical tool" refers to any device or assembly that can be used to operate on tissue (e.g., process, manipulate, respond to, hold, cut, heat, or energize tissue, etc.).

[0058] Referring now to the drawings, in which like reference numerals represent like components, embodiments of the present disclosure relate to an endoscopic vessel harvesting device (EVH). Referring Figure 1-11 , a cannula device 1000 for a vessel harvesting system (hereinafter referred to as "device 1000") includes a handle 102, a cannula assembly 110, and a bell 120. The cannula assembly 110 is adapted to be inserted into a patient's body during a vessel harvesting procedure. Specifically, the cannula assembly 110 can be inserted through an access path formed in the patient's body to allow access to the vessel to be harvested. The handle 102 can be held outside the patient's body so that an operator of the device 1000 can access it. In particular, as Figure 1-2As shown, the handle 102 can be composed of multiple sections, such as two half-sections 102a, 102b. The two half-sections 102a, 102b can be joined to each other by mechanical fasteners, ultrasonic welding, adhesives, etc. For example, the handle 102 can include a plurality of screw holes for receiving screws 106 to fix the half-sections 102a, 102b around the cannula assembly 110. The half-sections 102a, 102b can form an interference fit with the cannula assembly 110 to prevent vibration and / or play and ensure smooth operation of the device 1000.

[0059] Continuing to refer Figure 1-10 , the cannula assembly 110 can include a hollow outer tube 112 that defines a main chamber 114 therethrough. The outer tube 112 can include a flange 116 at its proximal end for interfacing with the handle 102 to prevent longitudinal movement of the cannula assembly 110 relative to the handle 102. The outer tube 112 and the main chamber 114 defined therein can have a generally circular cross-section, but other geometries can also be used. The distal end of the outer tube 112 of the cannula assembly 110 can include a nozzle 119. The nozzle 119 can define an orifice through which various other components described herein can extend from the outer tube 112.

[0060] The cannula assembly 110 can also include at least one, at least two, at least three, or at least four inserts that extend through the main chamber 114 of the outer tube 112. In the embodiment shown in the figures, the cannula assembly includes a first insert 124 and a second insert 130. The first insert 124 and the second insert 130 can extend parallel to each other within the main chamber 114 of the outer tube 112. The second insert 130 can define an injection channel 126 (see Figure 6 and 7 ) through which an injection tube 178 can be inserted. The injection tube 178 can be used to inject a gas, such as carbon dioxide, from the handle 102 to the distal end of the cannula assembly 110. In use, the gas supplied via the injection tube 178 expands the passageway in which the cannula assembly 110 is located, thereby allowing increased visibility within the passageway and increased operability of the surgical tool 400 within the passageway (see Figure 19 ). The first insert 124 can define a discharge channel 132 (see Figure 10 ) through which the discharged gas and smoke can flow from the distal end of the cannula assembly 110 to the handle 102.

[0061] As the first insert 124 and the second insert 130 are inserted into the outer tube 112, a tool path 140 can be defined within the main chamber 114 near or between the first insert 124 and the second insert 130. A surgical tool 400 for cutting and grasping a blood vessel to be removed (see Figure 19) It can be inserted through the tool path 140. Examples of suitable surgical tools are described in detail in the U.S. Provisional Patent Application titled "Organ Harvesting Tool" with Attorney Docket No. CS.918, filed on September 28, 2022, in the name of Maquet Cardiovascular LLC, the disclosure of which is hereby incorporated by reference in its entirety. As Figure 19 shown, the surgical tool 400 can include, for example, a pair of jaws 410 having heating elements for grasping, cutting, and cauterizing blood vessels. The jaws 410 can be connected to the distal end of a shaft 420, and the shaft 420 can be slid into the cannula assembly 110. Each of the first insert 124 and the second insert 130 can be a single continuous structural member such that the tool path 140 is substantially smooth and has no discontinuities along its entire length, such that the surgical tool 400, particularly its jaws 410, does not become stuck when sliding through the tool path 140.

[0062] Similar to the tool path 140, the endoscope path 142 can be defined within, adjacent to, or between the first insert 124 and / or the second insert 130 within the main chamber 114. The endoscope 200 (as Figure 15-18 shown) can be inserted through the endoscope channel 142.

[0063] Referring again to Figure 1-5 , the device 1000 can include a vascular protection ring 118 that can extend from the outer tube 112. The ring 118 can be attached to the distal end of a connecting rod 144 that extends through a rod channel 146 defined within, adjacent to, or between the first insert 124 and / or the main chamber 114. The proximal end of the connecting rod 144 can be attached to a switch or slider 148 of the handle 102. The switch 148 can be actuated by the operator to reciprocate the connecting rod 144 within the rod channel 146, thereby causing the ring 118 to extend from and retract into the outer tube 112. The ring 118 can be C-shaped with a cutout section through which the endoscope 200 and the surgical tool 400 can extend.

[0064] In use, during insertion and positioning of the cannula assembly 110 within a patient, the ring 118 can be retracted into the outer tube 112. Once the cannula assembly 110 is positioned in the desired location, the operator can actuate the switch 148 to move the connecting rod 144 distally and thereby cause the ring 118 to extend from the outer tube 112. The ring 118 can engage the tissue and / or vasculature of the patient that is not intended to be cut to prevent the surgical tool 400 from inadvertently damaging the tissue and / or vasculature. After the desired blood vessels have been harvested, the operator can actuate the switch 148 to move the connecting rod 144 proximally and retract the ring 118 into the outer tube 112 or the nozzle 119.

[0065] Referring again to Figure 1 、 6 and 11, the device 1000 may include one or more endoscope wash tubes 180 through which a wash solution (e.g., saline) may be injected to clean the endoscope 200. The endoscope wash tubes 180 may extend from the handle 102 through one or more endoscope wash channels 185 in the first insert 124 and / or the second insert 130, similar to the way the injection tube 178 extends through the injection channel 126. The wash solution may be supplied by the solution source tube 170 through which the wash solution is supplied from an external source (not shown), such as a pump or syringe, to the handle 102.

[0066] Now referring to Figure 1 、 4 、8, 9, 11, and 12, the device 1000 may include a ferrule gasket 150 that creates at least a partial seal between the ferrule assembly 110 and the handle 102. The ferrule gasket 150 may be disposed in the flange 116 of the outer tube 112 and may form a fluid seal around the inner perimeter of the flange 116. The ferrule gasket 150 may include a sloped or tapered sidewall 151 corresponding to the internal slope or taper of the flange 116.

[0067] The ferrule gasket 150 may define an injection orifice 152 that is aligned with the injection channel 126 such that the injection tube 178 may extend through the ferrule gasket 150 to connect to the gas source tube 183 through which injection gas is supplied from an external source (not shown) to the handle 102.

[0068] The ferrule gasket 150 may further define a discharge orifice 154 that is aligned with the discharge channel 132 such that discharge fumes may flow from the ferrule assembly 110 through the ferrule gasket 150. The discharge orifice 154 may be angled relative to the longitudinal axis of the device 1000 to direct the discharge gas into the filter chamber 190 within the handle 102. The size of the discharge orifice 154 may be set to regulate the flow of discharge gas through the discharge passage, particularly to balance the pressurization of the passage by removal of the discharge gas.

[0069] The cannula washer 150 may further define a tool orifice 156 that is aligned with the tool path 140 such that a surgical tool 400 can be inserted through the cannula washer 150 from the handle 102 into the cannula assembly 110. The cannula washer 150 may further define an endoscope orifice 158 that is aligned with the endoscope path 142 such that a surgical endoscope can be inserted through the cannula washer 150 from the handle 102 into the cannula assembly 110. The cannula washer 150 may further define a connecting rod orifice 160 and an endoscope wash orifice 162 that are associated with the connecting rod 144 and the endoscope wash tube 180, respectively, and allow the connecting rod 144 and the endoscope wash tube 180 to extend through the cannula washer 150.

[0070] The cannula washer 150 may include one or more posts 164 that project from the distal face 166 of the cannula washer 150. The one or more posts 164 interface with the proximal surfaces of the first insert 124 and the second insert 130 to space the distal face 166 of the cannula washer 150 from the proximal surfaces of the first insert 124 and the second insert 130. The gap created between the distal face 166 of the cannula washer 150 and the first insert 124 and the second insert 130 within the outer tube 112 facilitates gas flow between the cannula washer 150 and the cannula assembly 110.

[0071] Now referring Figure 20 and 21 , an alternative embodiment of the cannula washer 155 is shown. The cannula washer 155 may be interchangeable with the cannula washer 150 shown and described herein in connection Figure 12 with. Similar to the Figure 12 cannula washer 150, Figure 20 and 21 the cannula washer 155 includes a sidewall 151, an injection orifice 152, a discharge orifice 154, a tool orifice 156, an endoscope orifice 158, a connecting rod orifice 160, an endoscope wash orifice 162, one or more support posts 164, and a distal face 166. These components generally correspond to the components of the same number in the Figure 12 cannula washer 150 and perform the same functions. Figure 20 and 21 the discharge orifice 154 of the cannula washer 155 has a more rounded profile than the corresponding discharge orifice 154 of the Figure 12 cannula washer 150, which can improve discharge gas flow and can better receive the tube 302 of the filter assembly 300. Thus, the discharge orifice 154 of the cannula washer can have different shapes, such as circular (as shown in Figure 21 ), oval, rectangular, square, etc.

[0072] Now referring Figure 15-18, by actuating the proximal end 204 of the endoscope 200 relative to the housing 102, the surgical endoscope 200 can be extended and retracted within the endoscope path 142. In the retracted position, as Figure 15-16 shown, the distal end 202 of the endoscope 200 is recessed within the outer tube 112 or the nozzle 119 of the cannula assembly 110. In the retracted position, the endoscope 200 is isolated from the passage wall by the cannula assembly 110, but the field of view of the endoscope 200 is limited due to the position of the endoscope 200 within the cannula assembly 110. In the extended position, as Figure 17-18 shown, the distal end 202 of the endoscope 200 projects from the outer tube 112 and the nozzle 119 of the cannula assembly 110. In the extended position, the distal end 202 of the endoscope 200 is not blocked by the cannula assembly 110, allowing an expanded field of view compared to the retracted position. The proximal end 204 of the endoscope 200 can be at least partially positioned within the bell 120 of the device 1000 such that the operator has access to the proximal end 204 of the endoscope 200. To move the endoscope 200 from the retracted position to the extended position, the operator can push the proximal end 204 of the endoscope 200 distally into the bell 120. Conversely, the proximal end 204 of the endoscope 200 can be pulled proximally away from the bell 120 to move the endoscope from the extended position to the retracted position.

[0073] The endoscope 200 and / or the bell 120 can include snap-lock features 122 to releasably hold the endoscope 200 in the extended and retracted positions. That is, the endoscope 200 is held in the extended or retracted position until the operator applies a predetermined force to disengage the snap-lock features 122 and move the endoscope 200 to a different position. In use, during insertion of the cannula assembly 110 into the patient passage, the endoscope 200 can be placed in the retracted position to prevent damage or soiling of the endoscope 200. Once the cannula assembly 110 is positioned within the passage and the passage has been insufflated, the operator can move the endoscope 200 to the extended position to increase the field of view.

[0074] Now refer to Figure 13, the device 1000 may include a filter assembly 300 for removing particles from the exhaust gas generated during an organ collection procedure. The filter assembly 300 may be disposed within a filter chamber 190 in the handle 102. The filter assembly 300 may include an inlet tube 302 that extends at least partially into the exhaust orifice 154 of the cannula gasket 150. The proximal end of the inlet tube 302 may be fitted into a filter housing 304 that contains a particulate filter 306. The particulate filter 306 may be made of porous plastic embedded with activated carbon. In some embodiments, the orifice size of the particulate filter 306 may be in the range of approximately 45 micrometers (μm) with a tolerance of 10 (μm). In some embodiments, the carbon content of the particulate filter 306 may be approximately 40%. In some embodiments, the particulate filter 306 may include a fragrance element to reduce the odor of the fumes generated during a vascular collection procedure. The particulate filter 306 may be sized and designed to handle the volume of exhaust gas generated during an organ collection procedure, thereby preventing the exhaust gas from accumulating in the passageway and obstructing the viewing of the endoscope 200. For example, in some embodiments, the particulate filter 306 may facilitate a flow rate between approximately 0.150 liters per minute and 0.300 liters per minute at 0.25 psi.

[0075] The inlet tube 302 may be made of a rigid, corrosion-resistant, and hygienic material such as stainless steel. The filter housing 304 may be made of a shrinkable polymer such as polyvinylidene fluoride (PVDF), low-density polyethylene (LDPE), or an equivalent gamma-stabilized shrink tube. The inlet tube 302 may be connected to the distal end of the filter housing 304 by an interference fit (e.g., the filter housing may be shrunk around the inlet tube 302), welding, adhesive, or the like. The proximal end of the filter housing 304 may be open to allow the filtered exhaust gas to flow into the filter chamber 190 of the handle 102 and ultimately be discharged to the atmosphere.

[0076] Now referring to Figure 22 , an alternative embodiment of a filter 310 is shown. The filter 310 may be interchangeable with the filter 300 described and illustrated herein. Similar to the Figure 13 filter 300, the Figure 13 filter 310 includes an inlet tube 302, a filter housing 304, and a particulate filter 306 that generally correspond to and perform the same functions as the identically numbered components of the Figure 22 filter 300. Figure 12 Figure 22The inlet tube 302 of the filter 310 can include a bend, such as an S-shaped bend, to facilitate placement of the filter assembly 300 in the filter chamber 190. In addition, the filter 310 can include a secondary filter 308, such as a felt disk, positioned in the filter housing 304 adjacent to the particle filter 306. In particular, the secondary filter 308 can be configured to prevent particles of the particle filter 306 from passing through the proximal end of the filter housing 304.

[0077] Now refer to Figure 14 , the injection tube 178 can be formed into a plurality of sections, namely, a small tube 182 and a hypotube 184. The small tube 182 can be connected to the gas source tube 183 at the proximal end of the device 1000, and the hypotube 184 can extend distally from the small tube 182. The outer diameter of the small tube 182 can be greater than the outer diameter of the hypotube 184. In addition, the inner diameter of the small tube 182 can be greater than or equal to the outer diameter of the hypotube 184, so that the hypotube 184 can be partially inserted into the distal end of the small tube 182. The small tube 182 can be made of a plastic such as polycarbonate, which can be obtained under the trade name The hypotube 184 can be made of a rigid material such as stainless steel. A portion of the hypotube 184 can be inserted into the small tube 182, and the hypotube 184 can be made of a rigid material such as stainless steel. 1-20270 or LOCTITE AA 3921 is bonded to the small tube 182. In other embodiments (not shown), the injection tube 178 can be formed from a single continuous tubular section.

[0078] Now refer to Figure 2 , 4 5, the handle 102 can be formed of two half sections 102a, 102b as previously described. Each half section 102a, 102b can partially define the internal geometry and features of the handle 102, including the filter chamber 190, the tool guide channel 210, and the sleeve support structure 220. The filter chamber 190 can be defined by one or more walls within the handle 102, and can have an inlet opening 192, through which the inlet tube 302 of the filter assembly 300 can extend. The filter chamber 190 can also have a vent opening 194, through which the filtered exhaust gas can flow out of the handle 102 to the atmosphere.

[0079] The tool guide channel 210 may include an opening 109 (see FIG. Figure 11)Rib 212 extending toward tool orifice 156 of cannula washer 150. Rib 212 may have a linear or curved profile. The profile of rib 212 may be specifically designed to smoothly guide surgical tool 400 into tool orifice 156 and ultimately into tool path 140 of cannula assembly 110. Rib 212 may be formed by a continuous section of material extending distally within handle 102. The material forming rib 212 may have no discontinuities that would impede surgical tool 400 during insertion of tool 400 through handle 102. The distal end 214 of rib 212 may terminate proximal to cannula washer 150 to provide sufficient clearance for endoscope 200 within handle 102. Rib 212 may include ramp 216 to guide surgical tool 400 across the remaining distance between distal end 214 of rib 212 and cannula washer 150. Specifically, ramp 216 may include inclined surface 218 for guiding surgical tool 400 toward cannula assembly 110 and more specifically toward tool orifice 156 of cannula washer 150.

[0080] Continuing to refer to Figure 2 、 4 and Figure 8 , cannula support structure 220 may extend inwardly toward outer tube 112 of cannula assembly 110. Cannula support structure 220 may define a first surface 222 and a second surface 224, with first surface 222 engaging the distal face of flange 116 of cannula assembly 110 and second surface 224 engaging the proximal face of washer 150 and / or flange 116 to prevent movement of cannula assembly 110 relative to handle 102. Half-sections 102a, 102b of handle 102 may be sized to create an interference fit with flange 116 when half-sections 102a, 102b are assembled, thereby further preventing movement of cannula assembly 110 relative to handle 102.

[0081] While examples of the organ harvesting device have been provided in the foregoing description, those skilled in the art may make modifications and variations to these examples without departing from the scope and spirit of the present disclosure. Accordingly, the foregoing description is illustrative rather than restrictive. The disclosure described above is defined by the appended claims, and all changes that fall within the meaning and range of equivalents of the claims are embraced within their scope.

Claims

1. A cannula device for a blood vessel collection system, comprising: handle; as well as A cannula assembly extending distally from the handle, the cannula assembly comprising: an outer tube having a flange; and at least one insert extending within the outer tube and defining: a tool path configured to receive a surgical tool therethrough; an endoscope pathway configured to receive a surgical endoscope therethrough; and Injection channel; a cannula gasket disposed within the flange of the outer tube and defining a plurality of apertures, each aperture being aligned with one of the tool path, the endoscope path, and the injection channel; and An injection tube extends from the handle through the sleeve gasket and the injection passage.

2. The casing device according to claim 1, wherein, The gasket includes one or more posts that protrude distally from a distal surface of the sleeve gasket and interface with the insert within the outer tube to create a gap between the insert within the outer tube and a distal surface of the sleeve gasket.

3. The casing device according to claim 1, wherein, The gasket has a tapered sidewall that forms a fluid seal around an inner periphery of the flange of the outer tube.

4. The casing device according to claim 1, wherein, The at least one insert further defines a drain passage, Wherein, the sleeve gasket further defines a discharge orifice aligned with the discharge passage.

5. The casing device according to claim 4, wherein, The cannula device also includes a filter assembly housed in the handle to filter exhaust gas, the filter assembly comprising: an inlet tube extending at least partially into the discharge aperture of the sleeve gasket; a filter housing attached to the proximal end of the inlet tube; and A particle filter is arranged in the filter housing.

6. The casing device according to claim 5, wherein, The filter housing comprises a shrinkable polymer.

7. The casing device according to claim 5, wherein, The particle filter comprises a porous plastic with carbon embedded in it.

8. The casing device according to claim 5, wherein, The filter assembly is disposed within a filter chamber in the handle.

9. The casing device according to claim 8, wherein, The filter chamber defines a vent opening through which filter exhaust gases can flow to the atmosphere.

10. The casing device according to claim 1, wherein, The injection pipe comprises: A small tube configured to be connectable to a gas source; and A hypotube is partially inserted into the distal end of the small tube.

11. The casing device according to claim 1, wherein, The handle includes a tool guide channel for guiding the surgical tool to the tool path of the cannula assembly.

12. The casing device according to claim 11, wherein, The tool guide channel includes a rib that terminates proximally of the cannula assembly.

13. The casing device according to claim 12, wherein, The rib includes a ramp having an inclined surface for directing the surgical tool toward the cannula assembly.

14. The casing device according to claim 12, wherein, The rib is formed from a continuous section of material extending distally within the handle.

15. The casing device according to claim 1, wherein, The cannula device also includes an endoscope extending within the endoscope channel, The endoscope is movable between a retracted position and an extended position, wherein the distal end of the endoscope is recessed in the sleeve assembly in the retracted position and the distal end of the endoscope is extended from the sleeve assembly in the extended position.

16. The casing device according to claim 15, wherein, The cannula device also includes a bell extending from the proximal end of the handle, Wherein, the proximal end of the endoscope is at least partially positioned within the bell-shaped member such that the proximal end of the endoscope is accessible to an operator.

17. The casing device according to claim 1, wherein, The at least one insert further defines an endoscope washing channel configured to receive an endoscope washing tube passing therethrough. Wherein, the sleeve gasket further defines an endoscope washing orifice aligned with the endoscope washing channel.

18. The casing device according to claim 1, wherein The handle includes at least two sections that form an interference fit with the sleeve assembly.

19. The casing device according to claim 1, wherein, The handle includes a sleeve support structure, the sleeve support structure including: A first surface that engages the distal surface of the flange of the outer tube; and A second surface that engages the proximal surface of the flange of the outer tube.

20. The casing device according to claim 1, wherein, The at least one insert includes a first insert and a second insert. Wherein, the tool path and the endoscope path are defined between the first insert and the second insert.

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