CN111938770B - Elongated tube component containing elastic chuck for hard tube endoscopic surgery - Google Patents
Elongated tube component containing elastic chuck for hard tube endoscopic surgery Download PDFInfo
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- CN111938770B CN111938770B CN202010825778.1A CN202010825778A CN111938770B CN 111938770 B CN111938770 B CN 111938770B CN 202010825778 A CN202010825778 A CN 202010825778A CN 111938770 B CN111938770 B CN 111938770B
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- tube
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- outer sleeve
- pipe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3419—Sealing means between cannula and body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B2017/3443—Cannulas with means for adjusting the length of a cannula
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B2017/348—Means for supporting the trocar against the body or retaining the trocar inside the body
- A61B2017/3492—Means for supporting the trocar against the body or retaining the trocar inside the body against the outside of the body
Abstract
The invention discloses a slender tube assembly comprising an elastic chuck and used for hard tube endoscopic surgery, which comprises a base tube, an extension tube and the elastic chuck; the base tube comprises a base tube proximal end and a base tube distal end and a base tube wall extending therebetween, the base tube distal end comprising a thin-walled cylindrical portion; the elastic chuck comprises a proximal chuck tube and an elastic arm connected with the proximal chuck tube and extending towards the distal end, and the distal end of the elastic arm comprises a latch; the extension tube comprises an extension tube proximal end, an extension tube distal end and an extension tube wall extending therebetween, and the outer surface of the extension tube wall comprises a plurality of axially and uniformly distributed outer ring teeth; the extension pipe is arranged in the base pipe and can axially move relative to the base pipe; the collet is mounted on the distal end of the base tube, wherein the latch interengages with any of the outer ring teeth to limit axial movement of the extension tube relative to the base tube.
Description
Technical Field
The invention relates to a minimally invasive surgical instrument, in particular to an elongated tube assembly containing an elastic chuck for hard-tube endoscopic surgery.
Background
A puncture instrument is a surgical instrument used in minimally invasive surgery (especially hard-tube endoscopic surgery) for establishing an artificial passage into a body cavity. Typically consisting of a cannula assembly and a needle. The general clinical use mode is as follows: a small opening is cut on the skin of a patient, the puncture needle penetrates through the cannula assembly, and then the puncture needle penetrates through the abdominal wall through the skin opening to enter a body cavity. Once inside the body cavity, the needle is removed, leaving the cannula assembly as a passage for the instrument into and out of the body cavity.
In the hard tube laparoscopic surgery, a pneumoperitoneum machine is usually adopted to continuously perfuse gas (such as carbon dioxide gas) into the abdominal cavity of a patient and maintain a stable gas pressure (about 13-15 mmHg) so as to obtain a sufficient operation space. Cannula assemblies typically consist of a hollow tube, a housing, a sealing membrane (also known as an instrument seal) and a zero seal (also known as a self-seal). The cannula assembly penetrates from outside the body cavity to inside the body cavity to serve as a passage for instruments to and from the body cavity. The housing connects the hollow tube, zero seal and sealing membrane into a sealed system. The zero seal generally does not provide a seal for the inserted instrument, but automatically closes and forms a seal when the instrument is removed. The sealing membrane grips the instrument and forms a seal as it is inserted.
When the cannula assembly is secured to the abdominal wall of a patient, the hollow cannula may be divided into an extracorporeal section (length H1), a body wall section (length H2) and an intracorporeal section (length H3). The length H2 of the body wall segment varies, and when applied to different patients, the abdominal wall thickness varies from patient to patient, e.g., obese patients and lean abdominal walls vary widely; the wall section H2 varies for different puncture positions and puncture angles even when used with the same patient. The length H1 of the external section of the body cannot be reserved too long or too short, which is inconvenient for inserting the instruments, especially when the cannula assembly is used as a main operation hole and needs to be repeatedly switched, the length H1 of the external section of the body is too short, which is inconvenient for operating the instruments at different inclination angles. The length H3 of the in-vivo section is not changed greatly generally, and is reserved for 20-30 mm. The length of the hollow pipe of the sleeve pipe assembly in the prior art is fixed, and the requirements of different scene in the field cannot be met.
Disclosure of Invention
In one aspect of the invention, an elongated tube assembly comprising a collet for use in hard-borescope surgery is provided, comprising a base tube, an extension tube, and a collet. The base tube comprises a base tube proximal end and a base tube distal end and a base tube wall extending therebetween, the base tube distal end comprising a thin-walled cylindrical portion. The collet comprises a proximal collet tube and a resilient arm connected thereto and extending distally, the distal end of the resilient arm comprising a latch. The extension tube comprises an extension tube proximal end, an extension tube distal end and an extension tube wall extending therebetween, and the outer surface of the extension tube wall comprises a plurality of axially uniformly distributed outer ring teeth. The extension pipe is mounted inside the base pipe so as to be axially movable relative to the base pipe. The collet is mounted on the distal end of the base tube, wherein the latch interengages with any of the outer ring teeth to limit axial movement of the extension tube relative to the base tube. In one embodiment, the proximal collet tube is fixedly secured to the thin-walled cylindrical portion, and the resilient arms are in close contact with the outer surface of the thin-walled cylindrical portion and are deflectable away from the tube axis.
In yet another aspect, the collet further comprises a collet wall portion extending from the proximal collet tube towards the distal end, the collet wall portion and the thin-walled cylindrical portion being secured together by glue.
In yet another aspect, the elongated tube assembly further includes an outer sleeve including an outer sleeve proximal end and an outer sleeve distal end and an outer sleeve wall extending therebetween, the outer sleeve being mounted externally of the base tube and axially movable relative to the base tube.
In another scheme, the outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the axial movement of the extension pipe relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
In yet another embodiment, when the outer sleeve is moved to the locked position, the distal end of the outer sleeve is wrapped around the resilient arm, clamping the resilient arm between the thin-walled cylindrical portion and the wall of the outer sleeve, thereby preventing the resilient arm from deforming and thus preventing relative movement between the latch and the outer ring teeth, and further limiting axial movement of the extension pipe relative to the base pipe.
In yet another aspect, the resilient arm portion or all is exposed beyond the distal end of the outer sleeve when the outer sleeve is moved to the unlocked position; each outer ring tooth comprises an outer ring tooth root and an outer ring tooth top, when the extension pipe is axially moved, the outer ring tooth top pushes the clamping tooth to enable the elastic arm to deform, so that the clamping tooth is matched with the next outer ring tooth root after passing through the outer ring tooth top, and then the extension pipe can axially move relative to the base pipe.
In another scheme, the extension tube further comprises a sealing ring, wherein the sealing ring is fixed outside the near end of the extension tube and is in contact with the inner wall of the base tube, so that the near end of the extension tube and the base tube form an airtight seal.
In yet another aspect, a cannula assembly comprises an elongate tube assembly as described in any of the preceding aspects, and further comprising a seal assembly, wherein a proximal end of the elongate tube assembly is coupled to and forms a hermetic seal with a distal end of the seal assembly.
In one aspect of the invention, an elongated tube assembly for a cannula assembly is provided, comprising a base tube, an inner cannula, and an extension tube. The base tube comprises a base tube proximal end and a base tube distal end and a base tube wall extending therebetween; the distal end of the base tube comprises a first cantilever defined by a first undercut and a second undercut; and a second cantilever defined by the third slot and the fourth slot; the distal end of the first cantilever comprises a first latch and the distal end of the second cantilever comprises a second latch. The embedded pipe comprises an embedded pipe proximal end, an embedded pipe distal end and an embedded pipe wall extending therebetween, the embedded pipe is mounted inside the base pipe and fixed with the base pipe wall into a whole, and the first cantilever and the second cantilever are in contact with but not fixed with the embedded pipe. The extension tube comprises an extension tube proximal end and an extension tube distal end and an extension tube wall extending therebetween; the extension tube is mounted within the interior of the embedded tube for axial movement relative to the embedded tube.
In one scheme, the outer surface of the extension pipe wall comprises a plurality of axially uniformly distributed outer ring teeth; the first and second latch teeth may be intermeshed with either of the outer ring teeth to limit axial movement of the extension pipe relative to the base pipe.
In yet another aspect, each of the outer ring teeth includes an outer ring dedendum and an outer ring addendum; the first cantilever and the second cantilever have elasticity, and when the extension pipe is axially moved, the outer ring tooth top pushes the first clamping tooth to deform the first cantilever so that the first clamping tooth crosses the outer ring tooth top to be matched with the next outer ring tooth root; similarly, the outer ring addendum pushes the second latch to deform the second cantilever so that the second latch is matched with the next outer ring dedendum beyond the outer ring addendum.
In yet another aspect, the elongated tube assembly further includes an outer sleeve including an outer sleeve proximal end and an outer sleeve distal end with an outer sleeve wall extending therebetween, the outer sleeve being mounted externally of the base tube and axially movable relative thereto.
In another scheme, the outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the axial movement of the extension pipe relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
In another embodiment, when the outer sleeve is moved to the locking position, the distal end of the outer sleeve is wrapped outside the first and second cantilevers, and the first and second cantilevers are clamped between the inner embedded pipe and the outer sleeve to prevent the first and second cantilevers from deforming, so that the first and second latches and the outer ring teeth are prevented from moving relatively to each other, and the extension pipe is limited from moving axially relative to the base pipe; when the outer sleeve is moved to the unlocking position, the first cantilever and the second cantilever are partially or completely exposed out of the distal end of the outer sleeve, and the first deformation and the second deformation can be forced by axially moving the extension pipe, so that relative movement between the first latch, the second latch and the outer ring teeth is allowed.
In still another scheme, the height Hd1 of the outer ring teeth is more than or equal to 0.3mm and less than or equal to Hd1 and less than or equal to 0.5 mm.
In another scheme, the extension tube further comprises a sealing ring, the sealing ring is fixed outside the near end of the extension tube, and the sealing ring is in contact with the inner wall of the embedded tube, so that the near end of the extension tube and the static tube form air seal.
In yet another aspect, a sleeve assembly comprises an elongate tube assembly as described in any of the preceding aspects, and further comprising a seal assembly, wherein a proximal end of the elongate tube assembly is coupled to and forms a hermetic seal with a distal end of the seal assembly.
In one aspect of the present invention, a cannula assembly is provided comprising a seal assembly and an elongated tube assembly; the seal assembly comprises a first seal assembly and a second seal assembly; the second seal comprises a second capsule comprising a proximal capsule end and a distal capsule end and a wall portion extending therebetween. The proximal end of the elongated tube assembly is connected to and forms a seal with the distal end of the cartridge body. The elongated tube assembly includes a base tube, an extension tube, and an outer sleeve. The base tube comprises a base tube proximal end and a base tube distal end and a base tube wall extending therebetween, the base tube distal end comprising a first cantilever defined by a first slot and a second slot; and a second cantilever defined by the third slot and the fourth slot; the distal end of the first cantilever comprises a first latch and the distal end of the second cantilever comprises a second latch. The extension tube comprises an extension tube proximal end, an extension tube distal end and an extension tube wall extending therebetween, and the outer surface of the extension tube wall comprises a plurality of axially and uniformly distributed outer ring teeth; the outer sleeve includes an outer sleeve proximal end and an outer sleeve distal end with an outer sleeve wall extending therebetween. The extension pipe is mounted inside the base pipe and can axially move relative to the base pipe, and the first latch and the second latch can be meshed with any outer ring gear so as to limit the extension pipe from axially moving relative to the base pipe. The outer sleeve is mounted outside the base tube and is axially movable relative to the base tube.
In one scheme, the outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the extension pipe to move axially relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
In yet another aspect, each of the outer ring teeth includes an outer ring dedendum and an outer ring addendum; the first cantilever and the second cantilever have elasticity, and when the extension pipe is axially moved, the outer ring tooth top pushes the first clamping tooth to deform the first cantilever so that the first clamping tooth crosses the outer ring tooth top to be matched with the next outer ring tooth root; similarly, the outer ring addendum pushes the second latch to deform the second cantilever so that the second latch is matched with the next outer ring dedendum beyond the outer ring addendum.
In another embodiment, when the outer sleeve is moved to the locking position, the distal end of the outer sleeve is wrapped around the outer portions of the first and second cantilever arms and prevents the first and second cantilever arms from deforming, thereby preventing relative movement between the first and second latches and the outer ring teeth and further limiting axial movement of the extension pipe relative to the base pipe; when the outer sleeve is moved to the unlocking position, the first cantilever and the second cantilever are partially or completely exposed out of the distal end of the outer sleeve, and the first deformation and the second deformation can be forced by axially moving the extension pipe, so that relative movement between the first latch, the second latch and the outer ring teeth is allowed.
In still another scheme, the height Hd1 of the outer ring teeth is more than or equal to 0.3mm and less than or equal to Hd1 and less than or equal to 0.5 mm.
In another scheme, the extension tube further comprises a sealing ring, wherein the sealing ring is fixed outside the near end of the extension tube and is in contact with the inner wall of the base tube, so that the near end of the extension tube and the base tube form an airtight seal.
In yet another aspect, a method of providing a length of an elongate tube assembly of a sleeve assembly according to claim 4 is provided, comprising the steps of:
s1: moving the outer sleeve from the distal end to the proximal end until the first and second cantilevers are all exposed beyond the distal end of the outer sleeve;
s2: axially moving the extension pipe to axially displace the extension pipe relative to the base pipe, thereby adjusting the length of the elongated pipe assembly to a desired position;
s3: and moving the outer sleeve from the proximal end to the distal end until the distal end of the outer sleeve is wrapped outside the first and second cantilever arms and prevents the first and second cantilever arms from deforming, thereby preventing relative movement between the first and second latch teeth and the outer ring teeth and further limiting the extension pipe from moving axially relative to the base pipe.
In one aspect of the invention, a puncture instrument is provided that includes a cannula assembly and a puncture needle extending through the cannula assembly.
Drawings
For a fuller understanding of the nature of the present invention, reference should be made to the following detailed description taken together with the accompanying figures in which:
FIG. 1 is an exploded view of a seal assembly 2;
FIG. 2 is a cross-sectional view of the seal assembly 2;
fig. 3 is an exploded view of elongated tube assembly 3;
FIG. 4 is a perspective view of the base tube 300;
FIG. 5 is a perspective view of outer sleeve 500;
figure 6 is a side view of elongate tube assembly 3;
FIG. 7 is a cross-sectional view taken from 7-7 of FIG. 6;
fig. 8 is a schematic view of the outer sleeve of the elongated tube assembly 3 in an unlocked position;
FIG. 9 is a cross-sectional view of 9-9 of FIG. 8;
FIG. 10 is a perspective view of cannula assembly 1;
figure 11 is an exploded view of the elongate tube assembly 3 a;
FIG. 12 is a perspective view of base tube 300 a;
figure 13 is a perspective view of collet 600;
figure 14 is a side view of the elongate tube assembly 3 a;
FIG. 15 is a cross-sectional view of 15-15 of FIG. 14;
FIG. 16 is a perspective view of the tube assembly 1 a;
figure 17 is an exploded view of the elongate tube assembly 3 b;
FIG. 18 is a perspective view of base tube 300 b;
FIG. 19 is a side view of the elongate tube assembly 3 b;
FIG. 20 is a cross-sectional view 20-20 of FIG. 19;
the same reference numbers will be used throughout the drawings to refer to identical or similar parts or elements.
Detailed Description
Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which can be embodied in various forms. Therefore, the disclosure herein is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to employ the present invention. Embodiments of the present disclosure will now be described in detail with reference to the drawings, where for convenience, the party proximal to the operator is defined as the proximal end and the party distal from the operator is defined as the distal end.
Fig. 1-13 depict a cannula assembly 1 for laparoscopic surgery. The cannula assembly 1 includes a seal assembly 2 and an elongate tube assembly 3. Fig. 1-2 depict the structure and composition of the seal assembly 2. The seal assembly 2 may be divided into a first seal assembly 100 and a second seal assembly 200. The first seal assembly 100 is also referred to as an instrument seal assembly, and when an external instrument is inserted, the central bore of the first seal assembly grips the instrument to form an air tight seal. The second sealing assembly is also called a zero sealing assembly, when an external instrument is not inserted, the zero sealing assembly automatically closes to form sealing, when the external instrument is inserted, the zero sealing assembly opens, and no sealing is formed between the zero sealing assembly and the instrument. The locking groove 262 of the component 200 and the locking hook 112 of the component 100 are matched and fastened. The hook 112 and the slot 262 are matched to be quickly disassembled by one hand. The connection between the assembly 100 and the assembly 200 is implemented in a variety of ways. Besides the structure shown in the embodiment, a threaded connection or other quick locking structures can be adopted. Alternatively, the assembly 100 and the assembly 200 may be designed in a configuration that is not quickly detachable.
1-2, the first seal assembly 100 comprises a first seal housing 110, a first seal cartridge 190 and an instrument seal assembly 180 sandwiched therebetween. The housing wall 191 of the first seal cartridge 190 and the housing wall 111 of the first seal carrier 110 are secured together by ultrasonic welding, such that the proximal end 181 of the instrument seal assembly 180 forms an air tight seal with the periphery of the first seal carrier.
1-2, the second seal assembly 200 comprises a second seal cartridge 230, a second seal housing 260 and a zero seal 250 sandwiched therebetween. The second capsule 230 comprises a proximal cartridge body end 232 and a distal cartridge body end 234 and a wall portion 235 extending therebetween. The second capsule 230 further includes an inner wall 236 and a valve mounting hole 237 communicating with the inner wall. The valve spool 280 is mounted in the valve body 270 and together in the mounting hole 237. The flange 256 of the zero seal 250 is sandwiched between the inner wall 236 and the second seal carrier 260, and in this embodiment, the 4 mounting posts 268 of the second seal carrier 260 are in interference fit with the 4 mounting holes 238 (not shown) of the second seal cartridge 230, so that the flange 256 forms an air tight seal with the inner wall 236. In this embodiment, the zero seal 250 includes a single slit duckbill 253, which duckbill 253 opens when an external instrument is passed through the zero seal 250, and which duckbill 253 automatically closes when the instrument is removed.
Fig. 4-7 depict the structure and composition of elongate tube assembly 3, which elongate tube assembly 3 includes a base tube 300, an extension tube 400, and an outer sleeve 500. Fig. 4 depicts the structure and composition of substrate tube 300. The base tube 300 includes a base tube proximal end 310 and a base tube distal end 330 with a base tube wall 320 extending therebetween. The base tube wall 320 defines a first hollow passage 321. The base tube distal end 330 comprises a first cantilever 340 defined by a first undercut 341 and a second undercut 343; and a second cantilever 350 defined by a third slot 351 and a fourth slot 353; the distal end of the first cantilever 340 includes a first latch 349 and the distal end of the second cantilever 350 includes a second latch 359. In an alternative embodiment, the base tube 300 is injection molded from a polycarbonate plus fiberglass material, or from a nylon material, or from other similar plastic materials. The first, second, third and fourth cutting grooves cut off the first and second cantilevers from the base pipe wall, so that the first and second cantilevers have elasticity.
As shown in fig. 3, the extension tube 400 includes an extension tube proximal end 410 and an extension tube distal end 430 and an extension tube wall 420 extending therebetween. The inner surface of the extension tube wall defines a second hollow channel 421 and the extension tube distal end 430 defines an open tube lip 431. The outer surface of the extension tube wall 420 comprises a plurality of outer ring teeth 440, the plurality of outer ring teeth 440 are uniformly distributed on the outer surface of the extension tube wall along the axial direction thereof, the plurality of outer ring teeth 440 form a non-slip region 460, and the non-slip region 460 extends from the outer surface of the extension tube proximal end 410 to the extension tube distal end 430. In an alternative embodiment, the distance Dx between the anti-slip region 460 and the distal end 30 of the extension tube is 20mm or more and 30mm or less. Each of the outer ring teeth 440 includes an outer ring crest 441 and an outer ring root 449 (see FIG. 7).
As shown in fig. 5, the outer sleeve 500 includes an outer sleeve proximal end 510 and an outer sleeve distal end 530 and an outer sleeve arm 520 extending therebetween, the outer sleeve wall defining a third hollow passage 521. The outer sleeve proximal end 510 includes a bracelet 515, which bracelet 515 may include various non-slip threads or non-slip structures. The hand wheel 515 may be integrally injection molded with the outer sleeve or may be formed from two pieces joined together. For example, the outer sleeve is made of a metal material to facilitate reduction of the radial dimension while ensuring rigidity and strength, while the bracelet 515 is injection molded or machined from another material and then welded, bonded or riveted to the outer sleeve as a single piece.
Figures 6-9 depict the assembled relationship of the elongate tube assembly 3. The extension pipe 400 is mounted inside the base pipe 300 with the extension pipe wall 420 having a peripheral size and shape that matches the first hollow passage 321, and is axially movable relative to the base pipe. And the first and second latches 349, 359 may engage with either of the outer ring teeth 440 to limit axial movement of the extension pipe relative to the base pipe. In this example, the first latch 349 and the second latch 359 engage with the same outer ring gear, but the first latch 349 and the second latch 359 engage with different outer ring gears by modifying the axial positions of the first latch and the second latch.
The outer sleeve 500 is installed outside the base pipe 300, and the shape and the size of the third hollow channel 521 are matched with the outer peripheral size of the base pipe 300; the outer sleeve 500 is axially movable relative to the base tube. The outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the extension pipe to move axially relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
More specifically, referring to FIG. 7, when the outer sleeve 500 is moved to the locked position, i.e., the outer sleeve distal end 530 is wrapped around the exterior of the first and second cantilevered arms 340, 350, which are sandwiched between the outer sleeve wall 520 and the extension tube wall 420, the first and second cantilevered arms are prevented from deforming, thereby preventing relative movement between the first and second latches and the outer ring teeth, which in turn limits the extension tube 400 from moving axially relative to the base tube 300.
Referring to FIG. 8, when the outer sleeve is moved to the unlocked position, i.e., the first cantilever arms 340, the second cantilever arms 350 are mostly or entirely exposed beyond the outer sleeve distal end 530; as the extension tube 400 is moved axially, the outer ring crest 441 pushes against the first latch 349 to deform the first cantilever 340 such that the first latch 349 mates with the next outer ring root 449 over the outer ring crest 441; similarly, the outer ring crest 441 pushes against the second latch 359 to deform the second cantilever 350 such that the second latch 359 mates with the next outer ring root 449 over the outer ring crest 441.
Referring to fig. 7, the elongate tube assembly 3 further comprises a sealing ring 40, wherein the sealing ring 40 is fixed to the outside of the proximal end 410 of the extension tube, and may be fixed by glue or interference fit with the proximal end 410 of the extension tube by virtue of the elastic deformability of the sealing ring 40 itself. The seal ring 40 contacts the inner wall of the base tube 300 to provide a hermetic seal between the extension tube proximal end 410 and the base tube 300.
As shown in fig. 10, the cannula assembly 1 comprises a seal assembly 2 and an elongate tube assembly 3, the proximal end of the elongate tube assembly 3 being connected to the distal end of the seal assembly 2 and forming a gas tight seal. The second seal assembly 200 comprises a second seal cartridge 230, wherein the second seal cartridge 230 has a distal cartridge body end 234 that is shaped and sized to mate with the base tube proximal end 310, and the distal cartridge body end 234 is connected to and forms a gas-tight seal with the base tube proximal end 310. In one scheme, a glue bonding method is adopted to firmly connect the bin body far end 234 and the base tube near end 310 to form an air seal; another method employs an interference fit to securely couple and form an air tight seal between the distal cartridge body end 234 and the proximal base tube end 310. In addition to the above-listed methods, the method of attaching the sealing assembly 2 to the elongated tubular assembly 3 can include a variety of means. For example, a seal ring is added to the exterior of the base tube 300 tip, and the base tube tip and the distal end of the cartridge body are securely attached and form a gas-tight seal by a conventional snap-fit or threaded connection.
In one design, the height Hd1 of the outer ring gear 440 is equal to the shortest distance between the tooth top and the tooth bottom, wherein 0.3mm Hd1 mm 0.5mm, when Hd1 is less than 0.3mm, the outer ring gear is difficult to manufacture, and the depth of the outer ring gear engaged with the first and second latch teeth is too shallow, and the friction force of the outer ring gear wrapped on the abdominal wall wound of the patient is insufficient; when Hd1 is larger than 0.5mm, the outer diameter of the extension tube needs to be increased to ensure sufficient strength, so that the damage of the puncture wound is increased, and when the outer ring teeth are wrapped on the abdominal wall wound of the patient, the outer ring teeth with the height of more than 0.5 are easy to cause additional damage to the wound.
It will be appreciated by those skilled in the art that when cannula assembly 1 is used in laparoscopic surgery, the surgeon may vary the overall length of the elongated tube assembly of the cannula assembly and adjust the fixed depth of the cannula assembly in the abdominal wall to achieve the desired placement of the cannula assembly external section (length H1), body wall section (length H2) and internal section (length H3) according to the thickness of the abdominal wall of the patient, the position and angle of penetration of the cannula assembly, and the individual handling habits. A method of adjusting the length of an elongated tube assembly of a cannula assembly 1, comprising the steps of:
s1: moving the outer sleeve from the distal end to the proximal end until the first and second cantilevers are all exposed outside the distal end of the outer sleeve;
s2: axially moving the extension pipe to axially displace the extension pipe relative to the base pipe, thereby adjusting the length of the elongated pipe assembly to a desired position;
s3: and moving the outer sleeve from the proximal end to the distal end until the distal end of the outer sleeve is wrapped outside the first and second cantilever arms and prevents the first and second cantilever arms from deforming, thereby preventing relative movement between the first and second latch teeth and the outer ring teeth and further limiting the extension pipe from moving axially relative to the base pipe.
Figures 11-15 depict yet another elongate tube assembly 3 a. The elongated tube assembly 3a includes a base tube 300a, an extension tube 400, a collet 600 and an outer sleeve 500. As shown in fig. 12, the base tube 300a includes a base tube proximal end 310 and a base tube distal end 330a with a base tube wall 320 extending therebetween. The base tube wall 320 defines a first hollow passage 321. The base tube distal end 330a includes a thin-walled cylindrical portion 390.
As shown in fig. 13, the collet 600 comprises a proximal collet tube 610 and a resilient arm 620 connected thereto and extending distally, the distal end of the resilient arm 620 comprising a latch 629. In this example, the collet 600 includes 4 resilient arms 620 circumferentially spaced about the proximal collet tube, however, a lesser or greater number of resilient arms 620 may be included. The collet 600 also includes a collet wall portion 630 extending distally from the proximal collet tube 610, the collet wall portion 630 and the resilient arms 620 including a cut-out groove 640 therebetween such that the collet wall portion is disconnected from the resilient arms.
Figures 14-16 depict the assembled relationship of the elongate tube assembly 3 a. Referring to fig. 15, the collet 600 is mounted on the distal end of the base tube 300a, and the proximal collet 610 is firmly fixed to the thin-walled cylindrical portion 390. in a specific fixing scheme, the proximal collet 610 and the thin-walled cylindrical portion 390 are bonded by interference fit or glue; alternatively, the collet wall sections 630 and the thin-walled cylindrical section 390 may be secured together with glue to increase the strength of the thin-walled cylindrical section 390. The resilient arms 620 are shaped and dimensioned to naturally abut the outer surface of the thin-walled cylindrical portion 390, and are deflectable away from the axis of the tube.
As shown in fig. 15, the extension pipe 400 is installed inside the base pipe 300a, and the extension pipe is axially movable with respect to the base pipe. The latch 629 may engage any of the outer ring teeth 440 to limit axial movement of the extension tube 400 relative to the base tube 300 a.
As shown in fig. 15, the outer sleeve 500 is mounted outside the base pipe 300a, and the shape and size of the third hollow channel 521 match the outer peripheral size of the base pipe 300 a; the outer sleeve 500 is axially movable relative to the base tube. The outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the extension pipe to move axially relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
More specifically, referring to FIG. 15, when the outer sleeve 500 is moved to the locked position, i.e., the outer sleeve distal end 530 is wrapped around the outside of the resilient arms 620, the resilient arms 620 are sandwiched between the outer sleeve wall 520 and the thin-walled cylindrical portion 390, preventing the resilient arms 620 from deforming, thereby preventing relative movement between the first and second latches and the outer ring teeth, and thereby limiting axial movement of the extension pipe 400 relative to the base pipe 300 a.
When the outer sleeve is moved to the unlocked position, i.e., the resilient arms 620 are mostly or entirely exposed beyond the outer sleeve distal end 530; as the extension tube 400 is moved axially, the extension tube may move axially relative to the base tube as the outer ring crest 441 pushes against the first latch 349 deforming the resilient arms 620 to cause the latch 629 to ride over the outer ring crest 441 to mate with the next outer ring root 449.
As shown in fig. 15, the elongate tube assembly 3 further comprises a sealing ring 40, wherein the sealing ring 40 is fixed to the outside of the proximal end 410 of the extension tube, and may be fixed by glue or interference fit with the proximal end 410 of the extension tube by virtue of the elastic deformability of the sealing ring 40 itself. The seal ring 40 contacts the inner wall of the base tube 300 to hermetically seal the extension tube proximal end 410 to the base tube 300.
As shown in fig. 16, the sleeve assembly 1a comprises a sealing assembly 2 and an elongated tube assembly 3a, the proximal end of the elongated tube assembly 3a being connected to the distal end of the sealing assembly 2 and forming a gas tight seal. The second seal assembly 200 comprises a second seal cartridge 230, wherein the second seal cartridge 230 has a distal cartridge body end 234 that is shaped and sized to mate with the base tube proximal end 310, and the distal cartridge body end 234 is connected to and forms a gas-tight seal with the base tube proximal end 310.
It will be appreciated by those skilled in the art that when cannula assembly 1a is used in laparoscopic surgery, the surgeon may vary the overall length of the elongated tube assembly of the cannula assembly and adjust the fixed depth of the cannula assembly in the abdominal wall according to the thickness of the abdominal wall of the patient, the position and angle of penetration of the cannula assembly, and the individual handling habits, etc., so as to achieve the desired placement of the outer section (length H1), the wall section (length H2), and the inner section (length H3) of the cannula assembly. The size and resilience of the resilient arms of sleeve assembly 1a are more easily adjustable than sleeve assembly 1. The axially telescoping dimension of the cannula assembly 1a is relatively longer, since the thin-walled cylindrical portion can form a hermetic seal with the proximal end of the extension tube. The method and steps for adjusting the ferrules of the ferrule assembly 1a and the ferrule assembly 1 are substantially the same.
Figures 17-20 depict yet another elongate tube assembly 3 b. The elongated tube assembly 3b includes a base tube 300b, an extension tube 400, an embedded tube 30 and an outer sleeve 500. As shown in fig. 17, the embedded tube 30 includes an embedded tube proximal end 31 and an embedded tube distal end 33 with an embedded tube wall 32 extending therebetween, the embedded tube wall 32 defining a fourth hollow bore 39. As shown in fig. 18, the base tube 300b includes a base tube proximal end 310b and a base tube distal end 330b with a base tube wall 320b extending therebetween. The base tube wall 320b defines a first hollow passage 321 b. The base tube distal end 330b includes an axial slot 361b and a cantilever 340b defined by an axial slot 362 b; the distal end of the cantilever 340b includes a latch 349b, and in this example, the base tube 300b includes four cantilevers 340b arranged circumferentially, but more or fewer cantilevers may be included. In an alternative embodiment, the base tube 300b is injection molded from a polycarbonate plus fiberglass material, or from a nylon material, or other similar plastic material. The axial cutting groove cuts off the cantilever from the base pipe wall, so that the cantilever has elasticity.
Figures 19-20 depict the assembled relationship of the elongate tube assembly 3 b. Referring to fig. 20, the inner tube 30 is installed inside the base tube 300b and fixed integrally with the base tube wall 320b, and may be fixed by glue or interference fit. The cantilever 340b is in contact with the embedded pipe but is not fixed. The extension pipe 400 is mounted inside the embedded pipe 30 to be axially movable with respect to the embedded pipe. And the latch 349b may engage with any of the outer ring teeth 440 to limit axial movement of the extension pipe relative to the base pipe.
The outer sleeve 500 is mounted outside the base tube 300b, the outer sleeve 500 being axially movable relative to the base tube. The outer sleeve can move axially along the base pipe to a locking position or an unlocking position, and when the outer sleeve moves to the locking position, the outer sleeve locks the extension pipe and limits the extension pipe to move axially relative to the base pipe; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
More specifically, referring to FIG. 20, when the outer sleeve 500 is moved to the locked position, i.e., the outer sleeve distal end 530 is wrapped around the outside of the cantilever 340b, the cantilever 340b is sandwiched between the inset wall 32 and the outer sleeve wall 520, preventing the cantilever from deforming and thus preventing relative movement between the latch and the outer ring teeth, thereby limiting axial movement of the extension pipe 400 relative to the base pipe 300 b. When the outer sleeve is moved to the unlocked position, i.e., cantilever 340b is mostly or entirely exposed beyond the outer sleeve distal end 530; as the extension pipe 400 is axially moved, the outer ring crest 441 pushes against the dogs 349b to deform the cantilevers 340b such that the dogs 349b mate with the next outer ring root 449 over the outer ring crest 441.
As shown in fig. 20, the elongate tube assembly 3b further comprises a sealing ring 40, wherein the sealing ring 40 is fixed to the outside of the proximal end 410 of the extension tube, and may be fixed by glue or interference fit with the proximal end 410 of the extension tube by virtue of the elastic deformability of the sealing ring 40 itself. The seal ring 40 contacts the inner wall of the embedded tube 30 to hermetically seal the extension tube proximal end 410 to the embedded tube 30.
The sleeve assembly 1b (not shown) comprises a seal assembly 2 and an elongate tube assembly 3b, the proximal end of the elongate tube assembly 3b being connected to the distal end of the seal assembly 2 and forming a gas-tight seal. The second seal assembly 200 comprises a second seal cartridge 230, wherein the second seal cartridge 230 has a distal cartridge body end 234 that is shaped and sized to mate with the base tube proximal end 310, and the distal cartridge body end 234 is connected to and forms a gas-tight seal with the base tube proximal end 310 b.
It will be appreciated by those skilled in the art that when cannula assembly 1b is used in laparoscopic surgery, the surgeon may vary the overall length of the elongated tube assembly of the cannula assembly and adjust the fixed depth of the cannula assembly in the abdominal wall according to the thickness of the abdominal wall of the patient, the position and angle of penetration of the cannula assembly, and the individual handling habits, etc., so as to achieve the desired placement of the outer section (length H1), the wall section (length H2), and the inner section (length H3) of the cannula assembly. The size and the elasticity of the elastic arms of the sleeve assembly 1b are more easily adjustable than those of the sleeve assembly 1. The axially telescoping dimension of the cannula assembly 1b is relatively longer, since the embedded tube may form a hermetic seal with the proximal end of the extension tube. The method and steps for adjusting the ferrule of the ferrule assembly 1b and the ferrule assembly 1 are substantially the same.
In the illustrated case, the sleeve assembly is divided into a seal assembly and an elongated tubular assembly, the base tube of which is connected to the lower capsule of the seal assembly, but the base tube may also be integrally formed as a single piece with the lower capsule.
Those skilled in the art will readily appreciate that the cannula assembly also requires a mating needle. The puncture needle assembly constitutes a puncture instrument which then together penetrates the abdominal wall via an incision previously provided in the abdominal wall of the patient into the body cavity, and the puncture needle is removed leaving the extension tube as a passage for the instruments into and out of the body cavity. The introducer needle generally includes a handle portion, a shaft portion and a distal portion. For example, CN201611125444.3 entitled "improved bladeless visual puncture needle" is incorporated herein by reference, which is the puncture needle disclosed in the chinese invention application filed on 12/9/2016. The sleeve assembly formed by the telescopic bottom shell assembly can be retracted to the shortest length of the initial position, and then is matched with the improved knife-free visual puncture needle to form the puncture needle for penetrating through the abdominal wall, the puncture needle is taken away, then the base tube and the extension tube are rotated relatively, and further the fixed depth of the sleeve assembly on the abdominal wall is adjusted, so that the external section (long H1), the body wall section (long H2) and the internal section (long H3) of the sleeve assembly reach ideal settings. A retractable needle may also be designed to mate with the retractable cannula assembly.
Many different embodiments and examples of the invention have been shown and described. The individual embodiments each contain typically different distinguishing features, which can be interchanged or superimposed on one another. One of ordinary skill in the art can adapt the methods and apparatus described herein by making appropriate modifications without departing from the scope of the invention. Several modifications have been mentioned, and other modifications will occur to those skilled in the art. The scope of the invention should, therefore, be determined with reference to the appended claims, and not be construed as limited to the details of structure, materials, or acts shown and described in the specification and drawings.
Claims (5)
1. An elongated tube assembly comprising a collet for use in laparoscopic hard-tube surgery, characterized by:
1) comprises a base tube, an extension tube and an elastic chuck;
2) the base tube comprises a base tube proximal end and a base tube distal end and a base tube wall extending therebetween, the base tube distal end comprising a thin-walled cylindrical portion;
3) the elastic chuck comprises a proximal chuck tube and an elastic arm connected with the proximal chuck tube and extending towards the distal end, and the distal end of the elastic arm comprises a latch;
4) the extension tube comprises an extension tube proximal end, an extension tube distal end and an extension tube wall extending therebetween, and the outer surface of the extension tube wall comprises a plurality of axially and uniformly distributed outer ring teeth;
5) the extension pipe is arranged in the base pipe and can axially move relative to the base pipe;
6) the elastic chuck is arranged at the far end of the base pipe, wherein the chuck is meshed with any external ring gear, so that the extension pipe is limited to move axially relative to the base pipe
7) The near-end chuck tube is firmly fixed with the thin-wall cylindrical part, the elastic arm is tightly attached to the outer surface of the thin-wall cylindrical part, and the elastic arm can only deflect and deform towards the direction far away from the tube axis; the elastic chuck also comprises a chuck wall part extending from the near-end chuck tube to the far end, the chuck wall part and the thin-wall cylindrical part are fixed by glue, and the thin-wall cylindrical part and the near end of the extension tube form air seal.
2. The elongated tube assembly of claim 1, further comprising an outer sleeve including an outer sleeve proximal end and an outer sleeve distal end and an outer sleeve wall extending therebetween, the outer sleeve being mounted externally of the base tube and axially movable relative thereto.
3. The elongated tube assembly of claim 2, wherein the outer sleeve is axially movable along the base tube to a locked position or an unlocked position, the outer sleeve locking the extension tube when the outer sleeve is moved to the locked position, limiting axial movement of the extension tube relative to the base tube; the extension pipe is axially movable relative to the base pipe when the outer sleeve is moved to the unlocked position.
4. The elongated tube assembly of claim 3, wherein: when the outer sleeve moves to the locking position, the far end of the outer sleeve is wrapped outside the elastic arm, and the elastic arm is clamped between the thin-wall cylindrical part and the wall of the outer sleeve, so that the elastic arm is prevented from deforming, relative movement between the latch and the outer ring teeth is prevented, and the extension pipe is limited from moving axially relative to the base pipe.
5. The elongated tube assembly of claim 3, wherein: when the outer sleeve is moved to the unlocked position, the resilient arm portion or all is exposed beyond the distal end of the outer sleeve; each outer ring tooth comprises an outer ring tooth root and an outer ring tooth top, when the extension pipe is axially moved, the outer ring tooth top pushes the clamping tooth to enable the elastic arm to deform, so that the clamping tooth is matched with the next outer ring tooth root after passing through the outer ring tooth top, and then the extension pipe can axially move relative to the base pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010825778.1A CN111938770B (en) | 2020-08-17 | 2020-08-17 | Elongated tube component containing elastic chuck for hard tube endoscopic surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010825778.1A CN111938770B (en) | 2020-08-17 | 2020-08-17 | Elongated tube component containing elastic chuck for hard tube endoscopic surgery |
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| Publication Number | Publication Date |
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| CN111938770A CN111938770A (en) | 2020-11-17 |
| CN111938770B true CN111938770B (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010825778.1A Active CN111938770B (en) | 2020-08-17 | 2020-08-17 | Elongated tube component containing elastic chuck for hard tube endoscopic surgery |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102753450A (en) * | 2009-12-21 | 2012-10-24 | 管道保护有限公司 | Wellbore pipe protection device |
| CN103751004A (en) * | 2014-01-23 | 2014-04-30 | 乐清市火柴棒养生器械有限公司 | Flap massage hammer |
| CN110960741A (en) * | 2020-01-09 | 2020-04-07 | 朱金磊 | Built-in multidirectional regulation formula cranium brain drainage ware |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102802545A (en) * | 2009-05-29 | 2012-11-28 | 阿萨卢斯医疗器械有限公司 | Laparoscopic access port and port sleeve arrangement |
| US10987129B2 (en) * | 2015-09-04 | 2021-04-27 | Medos International Sarl | Multi-shield spinal access system |
| CN207202916U (en) * | 2017-03-07 | 2018-04-10 | 南京市妇幼保健院 | A kind of Multi-functional safety laparoscope puncture outfit |
| CN208989074U (en) * | 2018-09-08 | 2019-06-18 | 李冬梅 | A kind of power-assisted guide type anaesthetic puncture needle |
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2020
- 2020-08-17 CN CN202010825778.1A patent/CN111938770B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102753450A (en) * | 2009-12-21 | 2012-10-24 | 管道保护有限公司 | Wellbore pipe protection device |
| CN103751004A (en) * | 2014-01-23 | 2014-04-30 | 乐清市火柴棒养生器械有限公司 | Flap massage hammer |
| CN110960741A (en) * | 2020-01-09 | 2020-04-07 | 朱金磊 | Built-in multidirectional regulation formula cranium brain drainage ware |
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