CN111938777B - Hollow tube assembly for surgical puncture outfit - Google Patents

Hollow tube assembly for surgical puncture outfit Download PDF

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Publication number
CN111938777B
CN111938777B CN202010825843.0A CN202010825843A CN111938777B CN 111938777 B CN111938777 B CN 111938777B CN 202010825843 A CN202010825843 A CN 202010825843A CN 111938777 B CN111938777 B CN 111938777B
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China
Prior art keywords
locking
tunnel
pipeline
length
tube assembly
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CN202010825843.0A
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Chinese (zh)
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CN111938777A (en
Inventor
陈文超
曾国庆
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Chen Wenchao
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Individual
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Publication of CN111938777A publication Critical patent/CN111938777A/en
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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
    • 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
    • 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
    • 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

Abstract

The invention discloses a hollow tube component for a surgical puncture outfit, which comprises an outer pipeline, an inner pipeline and a locking piece, wherein the outer pipeline is connected with the outer pipeline; the outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole and a tunnel top wall connected with the first tunnel side wall, and the tunnel comprises a tunnel channel communicated with the first hollow channel; the inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged inside the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, and the outer lug is matched with the tunnel channel to limit the inner pipeline to rotate relative to the outer pipeline.

Description

Hollow tube assembly for surgical puncture outfit
Technical Field
The invention relates to a minimally invasive surgical instrument, in particular to a puncture outfit structure.
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 spike assembly and a spike. 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 puncture tube 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 puncture tube assembly as a passage for instruments 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. The puncture tube assembly typically consists 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 puncture tube assembly penetrates from the outside of the body cavity to the inside of the body cavity and is used as a passage for instruments to enter and exit 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 the instrument is inserted.
When the puncture tube assembly is secured to the abdominal wall of a patient, the hollow tube thereof 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., the difference between obese patients and the smaller abdominal wall thickness is greater; the wall section H2 varies for different puncture positions and puncture angles even when used with the same patient. The length H1 of the extracorporeal section cannot be reserved too long or too short, which is inconvenient for inserting the instrument, and especially when the puncture tube component is used as a main operation hole and needs to be repeatedly switched, the puncture tube component is too short which is inconvenient for operating the instrument 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 tube of the puncture tube 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 present invention, a hollow tube assembly for a puncture instrument is provided, comprising an outer tubing and an inner tubing. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole, and also comprises a tunnel top wall connected with the first tunnel side wall and the second tunnel side wall, and the first tunnel side wall, the second tunnel side wall and the tunnel top wall define a tunnel channel communicated with the first hollow channel; the tunnel extends axially to the vicinity of the distal end of the outer tube to form a closed tunnel end. The inner conduit includes an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface including an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end including an outer bump. The inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to rotate relative to the outer pipeline, and the inner pipeline can move axially relative to the outer pipeline.
In one scheme, the tunnel top wall further comprises an outer seat extending radially outwards, and the outer seat comprises a radial sliding chute and a radial communicating groove penetrating through the tunnel top wall; the hollow tube assembly further comprises a locking piece installed in the outer base, the locking piece comprises a lock core body matched with the radial communication groove in shape and size and a locking piece main body matched with the radial sliding groove in shape and size, and the locking piece can move in the radial sliding groove relative to the radial direction of the outer pipeline.
In another scheme, the locking piece comprises an unlocking state and a locking state, and in the locking state, the locking piece moves towards the axis direction of the outer pipeline so that the lock cylinder body enters the tunnel channel; under the state of unlocking, the locking piece moves towards the axis direction deviating from the outer pipeline, so that the lock cylinder body exits from the tunnel channel.
In another scheme, the tunnel further comprises a near-end plug, the shape and the size of the near-end plug are matched with those of the tunnel channel, and the near-end plug is installed at the near end of the tunnel.
In yet another aspect, the hollow tube assembly comprises a proximal locked state, a mobile state, and a distal locked state; in the proximal end locking state, the locking piece is in a locking state, and the outer convex block is limited between the proximal end plug and the proximal end of the lock cylinder body, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the far-end locking state, the locking piece is in a locking state, and the outer convex block is limited between the end of the tunnel and the far end of the lock cylinder body, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the moving state, the locking piece is in an unlocking state, and the inner pipeline can axially move relative to the outer pipeline.
In another scheme, the hollow tube assembly can be switched from a proximal locking state to a moving state and then to a distal locking state; or the far-end locking state can be switched to the moving state and then to the near-end locking state.
In yet another aspect, the hollow tube assembly further comprises a tube end seal mounted at the distal end of the outer tube, the tube end seal comprising a proximal elastomeric ring and a distal elastomeric ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.
In yet another aspect, a puncture tube assembly comprising a hollow tube assembly according to any one of the preceding claims, further comprising a sealing assembly, the proximal end of the hollow tube assembly being connected to and forming a gas tight seal with the distal end of the sealing assembly.
In one aspect of the present invention, a hollow tube assembly for a puncture instrument is provided that includes an outer tubing, an inner tubing, and a lock. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline still includes the axial tunnel that sets up along its axis direction, the tunnel contains the tunnel roof of being connected with first tunnel lateral wall and second tunnel lateral wall that links as an organic whole with outer pipe wall and with it, the tunnel contains the tunnel passageway with first cavity passageway UNICOM. The inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline. The tunnel roof contains the radial incision with tunnel passageway UNICOM, the latch fitting contain shape and size with radial incision assorted lock tooth, the outside at the tunnel roof is installed to the latch fitting, wherein the lock tooth inserts in the radial incision.
In one solution, the radial slit comprises a plurality of radial slots uniformly arranged on the tunnel top wall along the axial direction of the outer pipe.
In yet another aspect, the locking element includes a locking element block proximal end and a locking element block distal end and a locking element block extending therebetween; the locking teeth extend outwardly from the lock body, the plurality of locking teeth are substantially evenly distributed along the length of the lock body, and two adjacent locking teeth define a locking slot.
In yet another aspect, the lock includes an unlocked condition and a locked condition; in a locking state, the locking piece moves towards the axis direction of the outer pipeline, so that the locking teeth enter the tunnel channel through the radial cutting groove; under the state of unlocking, the locking piece moves towards the axis direction deviating from the outer pipeline, so that the locking teeth exit from the tunnel channel.
In yet another aspect, the hollow tube assembly comprises a locked state and a moved state; in the locking state, the locking piece is in a locking state, and the outer convex piece is limited between two adjacent locking teeth, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the moving state, the locking piece is in an unlocking state, and the inner pipeline can axially move relative to the outer pipeline.
In a further embodiment, the locking element comprises m locking teeth, wherein m > 3; the m locking teeth are substantially uniformly distributed along the length direction of the locking element body, the distance between two adjacent locking teeth is X2, the locking teeth 720b are a first locking tooth, a second locking tooth … … and an m locking tooth in sequence from the proximal end to the distal end; the length of the hollow tube assembly comprises m-1 length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the m-1 th locking tooth and the m-1 th locking tooth, the length of the hollow pipe assembly is Ltm-1. The inner pipeline length is Ltm-1, and the following relation is satisfied:
Ltm-1＝Lt1+(m-1)*X2
wherein:
ltm-1-m-1, m-th locking tooth matched, length of the hollow tube assembly;
lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth;
m is the serial number of the annular through groove;
x2-spacing of two adjacent locking teeth.
In yet another aspect, the hollow tube assembly is switchable between a locked state and a removed state.
In another scheme, the locking piece sealing device further comprises a locking piece sealing gasket, wherein the locking piece sealing gasket comprises a locking piece sealing sheet body and a locking tooth sealing hole penetrating through the sheet body; the locking piece sealing gasket is adhered to the outer portion of the top wall of the tunnel, wherein the locking tooth sealing holes are basically aligned with the radial cutting grooves; and air seal is formed between the locking tooth sealing hole and the locking tooth, so that air in the outer pipeline is prevented from leaking through a fit clearance between the radial cutting groove and the locking tooth.
In yet another aspect, a puncture tube assembly comprising a hollow tube assembly according to any one of the preceding claims, further comprising a sealing assembly, the proximal end of the hollow tube assembly being connected to and forming a gas tight seal with the distal end of the sealing assembly.
In another aspect, a method for adjusting the length of the hollow tube assembly of the above-mentioned puncture tube assembly comprises the following steps:
s1: moving the locking piece towards the direction deviating from the axis of the outer pipeline, so that the locking piece is changed from a locking state to an unlocking state;
s2: pulling the inner sleeve axially along the outer pipe to a desired length;
s3: press the latch fitting and cooperate the axial displacement interior sleeve pipe towards the axle center direction of outer pipeline for outer lug card is gone into between the locking tooth, and the latch fitting is changed into the latched state by the state of unblanking.
In one aspect of the present invention, an axially retractable puncture tube assembly is presented comprising a seal assembly and a hollow tube assembly, the seal assembly comprising 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 near end of the hollow pipe component is connected with the far end of the bin body to form sealing. The hollow tube assembly includes an outer tubing, an inner tubing, and a lock. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline still includes the axial tunnel that sets up along its axis direction, the tunnel contains the tunnel roof of being connected with first tunnel lateral wall and second tunnel lateral wall that links as an organic whole with outer pipe wall and with it, the tunnel contains the tunnel passageway with first cavity passageway UNICOM. The inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline. The tunnel roof contains the radial incision with tunnel passageway UNICOM, the latch fitting contain shape and size with radial incision assorted lock tooth, the outside at the tunnel roof is installed to the latch fitting, wherein the lock tooth inserts in the radial incision.
In one scheme, the radial cuts comprise a plurality of radial cutting grooves which are uniformly arranged on the top wall of the tunnel along the axial direction of the outer pipeline; the locking element including a locking element block proximal end and a locking element block distal end and a locking element block extending therebetween; the locking teeth extend outwardly from the lock body, the plurality of locking teeth are substantially evenly distributed along the length of the lock body, and two adjacent locking teeth define a locking slot.
In yet another aspect, the lock includes an unlocked condition and a locked condition; in a locking state, the locking piece moves towards the axis direction of the outer pipeline, so that the locking teeth enter the tunnel channel through the radial cutting groove; under the state of unlocking, the locking piece moves towards the axis direction deviating from the outer pipeline, so that the locking teeth exit from the tunnel channel.
In yet another aspect, the hollow tube assembly comprises a locked state and a moved state; in the locking state, the locking piece is in a locking state, and the outer convex piece is limited between two adjacent locking teeth, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the moving state, the locking piece is in an unlocking state, and the inner pipeline can axially move relative to the outer pipeline. In yet another embodiment, the tunnel comprises the end of the tunnel, the locking element comprises m locking teeth, wherein m is greater than 3, the m locking teeth are substantially uniformly distributed along the length of the locking element body from the proximal end to the distal end, and the locking teeth are sequentially a first locking tooth, a second locking tooth … … and an m locking tooth; two adjacent locking teeth define a locking slot having a width dimension X1 along the length of the lock body and a spacing X2 between the two adjacent locking teeth; the distance between the mth locking tooth and the end of the tunnel is equal to X1; when the outer convex block is limited between the mth locking tooth and the end of the tunnel, the inner pipeline can be limited to move axially relative to the outer pipeline.
In yet another aspect, the length of the hollow tube assembly comprises m length settings, and when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, which is referred to as the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the m-1 th locking tooth and the m-1 th locking tooth, the length of the hollow pipe assembly is Ltm-1. The length of the hollow tube assembly is Ltm when the outer projection is matched with the mth locking tooth and the end of the tunnel is matched. The inner pipe length of Ltm satisfies the following relationship:
Ltm＝Lt1+m*X2
wherein:
ltm-length of the hollow tube assembly when the outer protrusion is mated with the mth locking tooth and the end of the tunnel;
lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth;
m is the serial number of the annular through groove;
x2-spacing of two adjacent locking teeth.
In yet another aspect, the hollow tube assembly further comprises a tube end seal mounted at the distal end of the outer tube, the tube end seal comprising a proximal elastomeric ring and a distal elastomeric ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.
In another scheme, the locking piece sealing device further comprises a locking piece sealing gasket, wherein the locking piece sealing gasket comprises a locking piece sealing sheet body and a locking tooth sealing hole penetrating through the sheet body; the locking piece sealing gasket is adhered to the outer portion of the top wall of the tunnel, wherein the locking tooth sealing holes are basically aligned with the radial cutting grooves; and air seal is formed between the locking tooth sealing hole and the locking tooth, so that air in the outer pipeline is prevented from leaking through a fit clearance between the radial cutting groove and the locking tooth.
In another scheme, the locking device further comprises an elastic band, wherein the elastic band has a certain tightening force Fr, so that the locking piece is kept in a locking state, a sufficient pulling force F in the axial direction away from the outer pipeline is applied, and the locking piece can be forced to move in the axial direction away from the outer pipeline by overcoming the tightening force Fr, so that the locking piece is changed from the locking state to an unlocking state.
In still another aspect, a method of adjusting the length of the hollow tube member of the puncture tube assembly including an elastic band according to claim 9, comprises the steps of:
s1: applying a pulling force F towards the direction deviating from the axis of the outer pipeline, so as to move the locking piece and enable the locking piece to be changed from a locking state to an unlocking state;
s2: maintaining the tension F of the step S1 while pulling the inner sleeve axially along the outer pipe to a desired length;
s3: press the latch fitting and cooperate the axial displacement interior sleeve pipe towards the axle center direction of outer pipeline for outer lug card is gone into between the locking tooth, and the latch fitting is changed into the latched state by the state of unblanking.
In one aspect of the invention, a puncture tube assembly comprising a radial lock is provided, comprising a seal assembly and a hollow 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 near end of the hollow pipe component is connected with the far end of the bin body to form sealing. The hollow tube assembly includes an outer tube and an inner tube. The outer tube including an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline still includes the axial tunnel that sets up along its axis direction, the tunnel contains the tunnel roof of being connected with first tunnel lateral wall and second tunnel lateral wall that links as an organic whole with outer pipe wall and with it, the tunnel contains the tunnel passageway with first cavity passageway UNICOM. The inner conduit includes an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface including an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end including an outer bump. The inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to rotate relative to the outer pipeline, and the inner pipeline can move axially relative to the outer pipeline.
In one scheme, the tunnel top wall further comprises an outer seat extending radially outwards, and the outer seat comprises a radial sliding chute and a radial communicating groove penetrating through the tunnel top wall; the hollow tube assembly further comprises a locking piece installed in the outer base, the locking piece comprises a lock core body matched with the radial communication groove in shape and size and a locking piece main body matched with the radial sliding groove in shape and size, and the locking piece can move in the radial sliding groove relative to the radial direction of the outer pipeline.
In another scheme, the locking piece comprises an unlocking state and a locking state, and in the locking state, the locking piece moves towards the axis direction of the outer pipeline so that the lock cylinder body enters the tunnel channel; under the state of unlocking, the locking piece moves towards the axis direction deviating from the outer pipeline, so that the lock cylinder body exits from the tunnel channel.
In another aspect, the distal end of the cartridge body of the second capsule comprises a distal flange, and an extension tube and an extension cantilever extending distally from the distal flange; the shape and the size of the extension pipeline are matched with the near end of the outer pipe, and the extension pipeline is connected with the near end of the outer pipe to form air seal; the extended cantilever is shaped and sized to match the proximal end of the tunnel.
In yet another aspect, the hollow tube assembly comprises a proximal locked state, a mobile state, and a distal locked state; in the proximal end locking state, the locking element is in a locking state, and the outer convex block is limited between the extension cantilever and the proximal end of the lock cylinder body, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the far-end locking state, the locking piece is in a locking state, and the outer convex block is limited between the end of the tunnel and the far end of the lock cylinder body, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the moving state, the locking piece is in an unlocking state, and the inner pipeline can axially move relative to the outer pipeline.
In another scheme, the hollow tube assembly can be switched from a proximal locking state to a moving state and then to a distal locking state; or the far-end locking state can be switched to the moving state and then to the near-end locking state.
In another aspect, the distal end of the second capsule body comprises an extension baffle extending from the extension tube to the distal end, the extension baffle mating with the outside of the outer seat to limit the locking element from exiting the radial slot.
In another aspect, the hollow tube assembly further includes a locking piece sealing ring installed in the outer base, and a hermetic seal is formed between the locking piece sealing ring and the locking piece to prevent gas in the outer pipe from leaking through a fitting gap between the locking piece and the outer base.
In yet another aspect, the hollow tube assembly further comprises a tube end seal mounted at the distal end of the outer tube, the tube end seal comprising a proximal elastomeric ring and a distal elastomeric ring; the far end of the outer pipe comprises an outer cylindrical surface at the tail of the outer pipe, and the sealing element is fixed outside the outer cylindrical surface at the tail of the outer pipe; the inner pipeline comprises an outer cylindrical surface of the inner pipeline, and the distal end elastic ring is matched with the outer cylindrical surface of the inner pipeline to form a seal.
In one aspect of the present invention, a puncture instrument is provided that includes a puncture tube assembly and a puncture needle extending through the puncture tube 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 a cross-sectional view of the seal assembly 2 at 90 from FIG. 2;
FIG. 4 is a perspective view of an outer tube 500;
FIG. 5 is a proximal to distal projection view of an outer tube 500;
FIG. 6 is a cross-sectional view taken at 6-6 of FIG. 5;
fig. 7 is a schematic perspective view of an inner conduit 600;
figure 8 is a schematic perspective view of lock 700;
figure 9 is a side view of hollow tube assembly 3;
FIG. 10 is a cross-sectional view 10-10 of FIG. 9;
FIG. 11 is a schematic view of the unlocked state of the cross-sectional view of FIG. 10;
FIG. 12 is a distal locked state schematic of the cross-sectional view of FIG. 10;
FIG. 13 is an axial cross-sectional view of the spike assembly 1;
FIG. 14 is an axial cross-sectional view of the spike assembly 1 a;
FIG. 15 is a perspective view of the second capsule 230;
FIG. 16 is an enlarged view of 16-16 of FIG. 14;
FIG. 17 is a perspective view of the outer tubing 500 b;
fig. 18 is a cross-sectional view of the outer pipe 500 b;
FIG. 19 is a perspective view of lock 700 b;
fig. 20 is a perspective view of the locking element gasket 60 b;
fig. 21 is a side view of hollow tube assembly 3 b;
FIG. 22 is a cross-sectional view 22-22 of FIG. 21;
FIG. 23 is a side view of the puncture tube assembly 1 b;
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.
Figures 1-13 depict a puncture tube assembly 1 for use in laparoscopic procedures. The spike assembly 1 comprises a sealing assembly 2 and a hollow tube assembly 3. Fig. 1-3 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 239 of the component 200 and the locking hook 112 of the component 100 are fastened in a matching manner. The hook 112 and the slot 239 can be quickly detached 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, the structure can also adopt a threaded connection, a rotary buckle or other quick locking structures. Alternatively, the assembly 100 and the assembly 200 may be designed in a configuration that is not quickly detachable.
Fig. 1-3 depict the composition and assembled relationship of the first seal assembly 100. The seal membrane assembly 180 is sandwiched between the first seal housing 110 and the first seal cartridge 190. The proximal end 132 of the seal membrane assembly 180 is secured between the inner ring 116 of the first seal housing 110 and the inner ring 196 of the first seal cartridge 190. The fixing mode between the first sealing bin 190 and the first sealing seat 110 is various, and can adopt the modes of interference fit, ultrasonic welding, gluing, fastening and the like. The housing wall 191 of the first seal cartridge 190 and the housing wall 111 of the first seal housing 110 are fixed by ultrasonic welding. This securement places the proximal end 132 of the sealing membrane assembly 180 in compression.
Fig. 1-3 depict the composition and assembly of the sealing membrane assembly 180. The sealing membrane assembly 180 includes a lower fixing ring 120, a sealing membrane 130, a protector 160, and an upper fixing ring 170. The sealing membrane 130 and the protector 160 are sandwiched between the lower fixing ring 120 and the upper fixing ring 170. And the posts 121 of the lower retaining ring 120 are aligned with corresponding holes in the other components of the assembly 180. The post 121 is an interference fit with the hole 171 of the upper retaining ring 170 so that the entire sealing membrane assembly 180 is in a compressed state. The protector 160 comprises 4 sequentially overlapping protector sheets 163 for protecting the central seal of the sealing membrane 130 from perforation or tearing by the sharp edges of an inserted surgical instrument. The sealing membrane 130 includes a proximal end 132, a distal sealing lip 134, and a sealing wall extending proximally from the distal end, the sealing wall having a proximal face and a distal face. The sealing lip 134 is adapted to receive an inserted instrument and form an air seal. The sealing membrane 130 further includes a flange 136; the sealing wall 135 is connected at one end to the sealing lip 134 and at the other end to the flange 136; the floating portion 137 is connected at one end to the flange 136 and at the other end to the proximal end 132. The flange 136 is used to mount the guard 160. The floating portion 137 contains one or more radial (transverse) folds, thereby enabling the entire sealing membrane assembly 180 to float in the assembly 200.
Fig. 3-4 depict the composition and assembled relationship of the second seal assembly 200. 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 also has an inner wall 236 supporting the duckbill seal and an air valve mounting hole 237 communicating with the inner wall. The inner wall 236 defines a central through-hole 233 extending through the proximal end 232 and the distal end 234. The valve spool 280 is mounted in the valve body 270 and together in the mounting hole 237. The flange 256 of the duckbill seal 250 is sandwiched between the inner wall 236 and the second seal seat 260. The fixed mode between second seal receptacle 260 and the second sealed storehouse 230 has the multiple, can adopt interference fit, ultrasonic bonding, bonds, modes such as buckle fixed. The 4 mounting posts 268 of the second seal carrier 260 in this embodiment have an interference fit with the 4 mounting holes 238 of the second seal cartridge 230, which interference fit places the duckbill seal 250 in a compressed state. In this embodiment, the duckbill seal 250 is a single slit, but other types of closure valves, including flapper-type valves, multi-slit duckbill valves, may be used. The duckbill 253 can open when an external instrument is passed through the duckbill seal 250, but it typically does not provide a complete seal against the instrument. The duckbill 253 automatically closes when the instrument is removed.
Fig. 4-12 depict the structure and composition of hollow tube assembly 3, which hollow tube assembly 3 includes outer tubing 500, inner tubing 600, and lock 700. Fig. 4-6 depict the structure and composition of the outer tubing 500. The outer tube 500 includes an outer tube proximal end 510 and an outer tube distal end 530 and an outer tube wall 520 extending therebetween. The outer tube wall 520 defines a first hollow channel 521. The outer tube distal end 530 includes an outer tube cylindrical tail surface 540. The outer pipe 500 further comprises an axial tunnel 550 arranged in the axial direction thereof, the tunnel 550 comprising a first tunnel side wall 551 and a second tunnel side wall 552 integral with the outer pipe wall 520, and a tunnel top wall 553 connecting the tunnel side walls 551, 552. The tunnel side walls 551, 552 and the tunnel top wall 553 define a tunnel passage 555 communicating with the first hollow passage 521. In this example, the cross-section of the tunnel 550 is approximately U-shaped, but may be V-shaped, T-shaped, polygonal, or other non-closed wall patterns including openings. The tunnel 550 defines a tunnel entrance 557 at the outer tube proximal end 510, and the tunnel 550 extends axially to the vicinity of the outer tube distal end 530 to define a walled-off tunnel end 559. The tunnel top wall 553 further comprises an outer seat 560 extending radially outwards. The outer seat 560 comprises a radial runner 561 and a radial link 563 through the tunnel top wall 553. The geometric dimension of the circumference of the radial communicating groove 563 is smaller than that of the radial sliding groove 561, and a limit step 565 is formed at the bottom of the radial sliding groove 561. In an alternative embodiment, the proximal end of the outer seat 560 includes a T-slot (dovetail slot) 570.
As shown in fig. 7, the inner conduit 600 includes an inner conduit proximal end 610 and an inner conduit distal end 630 with an inner conduit wall 620 extending therebetween. The inner surface of the inner conduit wall defines a second hollow channel 621 while the outer surface comprises an outer cylindrical surface 670 of the inner conduit having a diameter Dw 1. The inner tube distal end 630 defines an open tube lip 631. The outer surface of the inner tube proximal end 610 includes outer nubs 640.
As shown in fig. 8, the lock 700 includes a lock body 710 and a cylinder body 720 coupled thereto. The cylinder body 720 includes a cylinder proximal end 721 and a cylinder distal end 727. The lock body 710 includes a laterally outwardly extending lock lever 715.
Fig. 9-12 depict the assembled relationship of the hollow tube assembly 3. Referring first to fig. 9-10, wherein the inner conduit 600 is mounted within the outer conduit 500, wherein the inner conduit outer cylindrical surface 670 is shaped and dimensioned to mate with the first hollow channel 521 and the outer protrusion 640 mates with the tunnel channel 555 to limit rotational movement of the inner conduit 600 relative to the outer conduit 500, the inner conduit 600 is axially movable relative to the outer conduit 500. The latch 700 is mounted in the outer seat 560 of the outer pipe 500 with the latch body 720 shaped and dimensioned to match the radial link groove 563 and the latch body 710 shaped and dimensioned to match the radial runner 561, in which radial runner 561 the latch 700 is movable in the radial direction with respect to the outer pipe 500.
As shown in fig. 10, the hollow tube assembly 3 further includes a proximal plug 50 which is shaped and dimensioned to mate with the tunnel passageway 555, the proximal plug being mounted at the proximal end of the tunnel 550. The fixing mode includes but is not limited to interference connection, glue bonding, ultrasonic welding and heating welding. The hollow tube assembly 3 further includes a locking element sealing ring 60, the locking element sealing ring 60 being mounted (bonded) over the limiting step 565. A hermetic seal is formed between the locking member sealing ring 60 and the locking member 700 to prevent gas in the outer pipe from leaking through a fitting gap between the locking member and the outer seat.
Referring now to fig. 10-12, the lock 700 includes an unlocked condition and a locked condition. In the locked state, the locking member 700 moves toward the axial direction of the outer pipe 500 so that the cylinder body 720 enters the tunnel passage; in the unlocked state, the locking member 700 moves in a direction away from the axis of the outer pipe 500 so that the cylinder body 720 exits the tunnel passage. The hollow tube assembly 3 further comprises a limiting lock 80, the limiting lock 80 comprises a T-shaped block 81 (not shown in the figure) and a baffle 89, the T-shaped block 81 is installed in a T-shaped groove (dovetail groove) 570 at the proximal end of the outer base 560, and the baffle 89 limits the locking piece 700 from falling out of the radial sliding groove 561.
The hollow tube assembly 3 comprises a proximal locked state, a mobile state and a distal locked state. Figure 10 depicts hollow tube assembly 3 in a proximally locked condition wherein lock 700 is in a locked condition and outer protrusion 640 is captured between proximal plug 50 and lock cylinder proximal end 721 to thereby limit axial movement of the inner conduit relative to the outer conduit. In the proximal locked state, the hollow tube assembly 3 comprises a shortest length Lmin. Figure 12 depicts hollow tube assembly 3 in a distal locked condition in which lock 700 is in a locked condition and outer protrusion 640 is trapped between tunnel end 559 and lock cylinder distal end 727, thereby restricting axial movement of the inner tube relative to the outer tube. In the distal locked state, the hollow tube assembly 3 comprises a maximum length Lmax. Fig. 11 depicts hollow tube assembly 3 in a displaced state, wherein lock 700 is in an unlocked state and the inner conduit is axially movable relative to the outer conduit.
As shown in fig. 9-10, hollow tube assembly 3 further comprises a tube end seal 800 mounted on the distal end of the outer tube, said tube end seal 800 comprising a proximal elastomeric ring 810 having an inner diameter Dt1 and a distal elastomeric ring 830 having an inner diameter Dt 3. The seal 800 is mounted on the outside of the outer cylindrical surface 540 with the proximal elastomeric ring 810 mating with the outer cylindrical surface 540 to form a hermetic seal and the distal elastomeric ring 830 mating with the outer cylindrical surface 670 of the inner conduit to form a hermetic seal. In one embodiment, the proximal elastic ring 810 and the outer tube tail cylindrical surface 540 are fixed by glue.
As shown in fig. 13, the puncture tube assembly 1 comprises a sealing assembly 2 and a hollow tube assembly 3, and the proximal end of the hollow tube assembly 3 is connected to the distal end of the sealing assembly 2 and forms an airtight seal. In this example, the second capsule 230 has a distal cartridge body end 234 that is shaped and dimensioned to mate with the outer tube proximal end 510, and the distal cartridge body end 234 is joined to and hermetically seals with the outer tube proximal end 510. In one scheme, the far end 234 of the bin body is firmly connected with the near end 510 of the outer tube by adopting a glue bonding method to form air seal; another method employs an interference fit to securely couple and form an air tight seal between the cartridge body distal end 234 and the outer tube proximal end 510. The method of connecting the sealing member 2 and the hollow tube member 3 includes various ways in addition to the above-listed methods. For example, a sealing ring is added to the outside of the tip of the outer tube 500, and the outer tube tip and the distal end of the cartridge body are firmly connected and hermetically sealed by a conventional snap-fit connection or a threaded connection.
It will be appreciated by those skilled in the art that the hollow tube assembly of the puncture tube assembly 1 comprises two lengths, the shortest length Lmin and the longest length Lmax, and when the puncture tube assembly 1 is used in laparoscopic surgery, the surgeon can switch the length of the hollow tube assembly of the puncture tube assembly 1 between Lmin and Lmax according to the thickness of the abdominal wall of the patient, the position and puncture angle of the puncture tube assembly, the personal operation habit and the like, and the length switching method comprises the following steps:
s1: pulling the locking member lever 715 outward toward a direction away from the axis of the outer pipe 500, so that the locking member is changed from the locking state to the unlocking state;
s2: pulling the inner sleeve 600 axially along the outer pipe from the near end to the far end or from the far end to the near end;
s3: the locking member operating lever 715 is pressed toward the axial direction of the outer pipe 600 so that the locking member is changed from the unlocked state to the locked state.
Fig. 14-16 depict yet another improved spike assembly 1a, said spike assembly 1a comprising a sealing assembly 2 and a hollow tube assembly 3 a. The hollow pipe assembly 3a includes an outer pipe 500, an inner pipe 600, a locking member 700, a locking member sealing ring 60 and a pipe tail sealing member 800, and the fitting relationship between the components is completely the same as that in the hollow pipe assembly 3, and will not be described herein again. The hollow tube assembly 3a is substantially identical in construction and composition to hollow tube assembly 3 except that hollow tube assembly 3a does not include proximal plug 50 and stop lock 80.
Referring to fig. 14-15, the cartridge body distal end 234 of the second capsule 230 includes a distal flange 2341, and an extension duct 2343 and an extension cantilever 2345 extending distally from the distal flange 2341, the extension duct 2343 further including an extension baffle 2347 extending distally. As shown in fig. 14 and 16, the puncture tube assembly 1a comprises a sealing assembly 2 and a hollow tube assembly 3a, and the proximal end of the hollow tube assembly 3a is connected to the distal end of the sealing assembly 2 and forms a hermetic seal. In this example, the extension conduit 2343 of the second capsule 230 is shaped and dimensioned to mate with the outer tube proximal end 510, and the extension conduit 2343 is coupled to the outer tube proximal end 510 and forms an airtight seal. In one approach, the extension conduit 2343 is securely attached to the outer tube proximal end 510 by glue bonding and forms a hermetic seal; another method of interference fitting is to securely connect the extension conduit 2343 to the outer tube proximal end 510 and form a gas tight seal. The extended cantilever 2345 is shaped and sized to match the proximal end of the tunnel.
The lock 700 in the spike assembly 1a includes an unlocked state and a locked state. In the locked state, the locking member 700 moves toward the axial direction of the outer pipe 500 so that the cylinder body 720 enters the tunnel passage; in the unlocked state, the locking member 700 moves in a direction away from the axis of the outer pipe 500 so that the cylinder body 720 exits the tunnel passage. The spike assembly 1a comprises a proximal locked state, a travel state and a distal locked state. Fig. 14 and 16 depict the penetration tube assembly 1a in a proximal locked state. In the proximal locked position, the lock 700 is in the locked position and the male protrusion 640 is confined between the extended cantilever arm 2345 and the proximal end 721 of the lock cylinder, thereby restricting axial movement of the inner conduit relative to the outer conduit. In the proximal locked state, the hollow tube assembly of the spike assembly 1a comprises a shortest length Lmin. In the distal locked position, the lock 700 is in the locked position and the outer protrusion 640 is trapped between the tunnel end 559 and the lock core distal end 727, thereby restricting axial movement of the inner conduit relative to the outer conduit. In the distal locked state, the hollow tube assembly of the spike assembly 1a comprises a longest length Lmax. In the moved state, the locking member 700 is in the unlocked state and the inner conduit is axially movable relative to the outer conduit. The extended bezel 2347 mates with the outside of the outer seat 560 to limit the lock 700 from exiting the radial slide 561.
Fig. 17-22 depict the structure and composition of a hollow tube assembly 3b, which hollow tube assembly 3b includes an outer tubing 500b, an inner tubing 600, a lock 700b, and a lock gasket 60 b. Fig. 17-18 depict the structure and composition of the outer tubing 500 b. The outer conduit 500b includes an outer tube proximal end 510 and an outer tube distal end 530 and an outer tube wall 520 extending therebetween. The outer tube wall 520 defines a first hollow channel 521. The outer tube distal end 530 includes an outer tube cylindrical tail surface 540. The outer pipe 500 further comprises an axial tunnel 550b arranged in the axial direction thereof, the tunnel 550b comprising a first tunnel side wall 551 and a second tunnel side wall 552 integral with the outer pipe wall 520, and a tunnel top wall 553b connected to the tunnel side walls 551, 552. The tunnel side walls 551, 552 and the tunnel top wall 553b define a tunnel passage 555 communicating with the first hollow passage 521. In this example, the cross-section of the tunnel 550 is approximately U-shaped, but may be V-shaped, T-shaped, polygonal, or other non-closed wall patterns including openings. The tunnel 550 defines a tunnel entrance 557 at the outer tube proximal end 510, and the tunnel 550 extends axially to the vicinity of the outer tube distal end 530 to define a walled-off tunnel end 559. The tunnel top wall 553b also comprises a radial cut 580 extending therethrough, said radial cut 580 comprising, in one version, a plurality of radial cuts 581, the plurality of radial cuts 581 being uniformly arranged in the tunnel top wall 553b along the axial direction of the outer duct, two adjacent radial cuts 581 defining a cross member 583. The radial slots 581 have a width dimension P1 along the axial direction, the distance between two adjacent radial slots 581 being P2 (obtained by measuring the distance between the geometric centers of two adjacent radial slots 581).
Figure 19 depicts the structure and composition of a locking element 700b comprising a locking element block proximal end 711 and a locking element block distal end 719 with a locking element block 710 extending therebetween. Locking teeth 720b extend outwardly from lock body 710, a plurality of locking teeth 720b are substantially evenly distributed along the length of lock body 710, and two adjacent locking teeth 720b define a locking slot 730 b. The width dimension of the locking groove 730b along the length of the lock body 710 is X1 and the distance between two adjacent locking teeth is X2 (obtained by measuring the distance between the geometric centers of two adjacent locking teeth). Fig. 20 depicts the structure and composition of a locking piece seal 60b, the locking piece seal 60b comprising a locking piece sealing blade body 61b and locking tooth sealing holes 63b extending through the blade body, the locking tooth sealing holes 63b being evenly distributed along the locking piece sealing blade body length.
Fig. 21-22 depict the assembled relationship of the hollow tube assembly 3 b. The inner conduit 600 is mounted inside the outer conduit 500b, wherein the inner conduit has an outer cylindrical surface 670 shaped and dimensioned to fit the first hollow channel 521, and wherein the outer protrusion 640 fits into the tunnel channel 555 to limit rotational movement of the inner conduit 600 relative to the outer conduit 500b, and wherein the inner conduit 600 is axially movable relative to the outer conduit 500 b. The locking member seal 60b is installed outside of the tunnel 550b with the locking tooth seal hole 63b generally aligned with the radial slot 581. In one implementation, the lock seal 60b is bonded to the exterior of the tunnel top wall 553 b. A lock 700b is mounted outside the tunnel 550b, wherein the lock teeth 720b are shaped, sized and positioned (spaced) to match the radial slots 581, said lock 700b being radially movable along the radial slots 581 relative to the outer pipe 500 b. The locking tooth sealing hole 63b and the locking tooth 720b form a gas seal therebetween, preventing gas in the outer pipe from leaking through a fitting gap between the radial slits 581 and the locking teeth.
The lock 700b includes an unlocked state and a locked state. In the locked state, the locking member 700b moves toward the axial direction of the outer pipe 500b so that the locking teeth 720b enter the tunnel passage; in the unlocked state, the locking element 700b is moved away from the axial center of the outer pipe 500b such that the locking teeth 720b exit the tunnel passage. The hollow tube assembly 3b comprises a locked state and a moved state. Figure 22 depicts hollow tube assembly 3b in a locked state. In the locked state, the locking member 700b is in the locked state, and the outer protrusion 640 is restricted between two adjacent locking teeth 720b, thereby restricting the inner pipe from moving axially relative to the outer pipe. In the moving state, the locking member 700b is in the unlocked state, and the inner pipe is axially movable relative to the outer pipe.
As shown in fig. 21-22, the hollow tube assembly 3b further comprises a tube end seal 800 mounted on the distal end of the outer tube, said seal 800 being mounted on the outside of the outer tube cylindrical surface 540, wherein the proximal elastic ring 810 mates with the outer tube cylindrical surface 540 to form an airtight seal, and the distal elastic ring 830 mates with the inner tube cylindrical surface 670 to form an airtight seal.
In one embodiment, lock 700b includes m (m ≧ 3) lock teeth 720b, the m lock teeth 720b are substantially uniformly distributed along the length of lock body 710, and the spacing between two adjacent lock teeth is X2. From the proximal end to the distal end, the locking tooth 720b is a first, a second … …, and an mth locking tooth 720b in sequence. The length of the hollow tube assembly comprises m-1 length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the (m-1) th locking tooth, the length of the hollow pipe assembly is Ltm-1. The length of the inner pipeline is Ltm-1The following relationship is satisfied:
Ltm-1＝Lt1+(m-1)*X2
wherein:
Ltm-1-length of the hollow tube assembly when the mth locking tooth is mated;
lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth;
m is the serial number of the annular through groove;
x2-spacing of two adjacent locking teeth.
In yet another alternative, locking element 700b includes m (m.gtoreq.3) locking teeth 720b, wherein the m locking teeth 720b are substantially evenly distributed along the length of locking element body 710 from the proximal end to the distal end, and wherein locking teeth 720b are, in order, a first, a second … …, and an mth locking tooth 720 b. Two adjacent teeth define a slot 730b having a width dimension X1 along the length of lock body 710 and a spacing X2 between the two adjacent teeth. In the hollow tube module 3b, the distance between the mth locking tooth and the tunnel end 559 is equal to X1. When the outer bump 640 is constrained between the mth locking tooth and the tunnel end 559, the inner pipe is constrained from axial movement relative to the outer pipe. The length of the hollow tube assembly comprises m length settings; when the outer protrusion is matched with the first and second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second third locking tooth, the length of the hollow tube assembly is Lt 2; by analogy, when the outer lug is matched with the (m-1) th locking tooth, the length of the hollow pipe assembly is Ltm-1. The length of the hollow tube assembly when the outer protrusion is mated with the mth locking tooth, tunnel end 559, is Ltm. The inner pipe length of Ltm satisfies the following relationship:
Ltm＝Lt1+m*X2
wherein:
ltm-length of the hollow tube assembly when the outer protrusion is mated with the mth locking tooth and the end of the tunnel;
lt1 — length of the hollow tube assembly when the outer tab mates with the first and second locking teeth;
m is the serial number of the annular through groove;
x2-spacing of two adjacent locking teeth.
As shown in fig. 23, the puncture tube assembly 1b comprises a sealing assembly 2 and a hollow tube assembly 3b, wherein the proximal end of the hollow tube assembly 3b is connected to the distal end of the sealing assembly 2 and forms an airtight seal. In this example, the second capsule 230 has a distal cartridge body end 234 that is shaped and dimensioned to mate with the outer tube proximal end 510, and the distal cartridge body end 234 is joined to and hermetically seals with the outer tube proximal end 510. In one scheme, the far end 234 of the bin body is firmly connected with the near end 510 of the outer tube by adopting a glue bonding method to form air seal; another method employs an interference fit to securely couple and form an air tight seal between the cartridge body distal end 234 and the outer tube proximal end 510. In one version, the distal end 234 of the cartridge body includes an extension tab 2347, the extension tab 2347 limiting the release of the lock 700b from the radial slots 581.
It will be appreciated by those skilled in the art that when the puncture tube assembly 1b is used in laparoscopic surgery, the surgeon can change the overall length of the hollow tube assembly of the puncture tube assembly and adjust the fixed depth of the puncture tube assembly in the abdominal wall according to the thickness of the abdominal wall of the patient, the position and puncture angle of the puncture tube assembly, and the personal operation habit, etc., so that the desired arrangement of the external section (length H1), the internal section (length H2) and the internal section (length H3) of the puncture tube assembly is achieved. The method of adjusting the length of the hollow tube of the puncture tube assembly 1b comprises the steps of:
s1: moving the locking piece towards the direction deviating from the axis of the outer pipeline, so that the locking piece is changed from a locking state to an unlocking state;
s2: pulling the inner sleeve axially along the outer pipe to a desired length;
s3: press the latch fitting and cooperate the axial displacement interior sleeve pipe towards the axle center direction of outer pipeline for outer lug card is gone into between the locking tooth, and the latch fitting is changed into the latched state by the state of unblanking.
Still another improved puncture tube assembly 1c (not shown in the figures) comprises a puncture tube assembly 1b, and further comprises an elastic band 90, wherein the elastic band 90 has a certain tightening force Fr, so that the locking piece 700b is kept in a locking state, and applies a sufficient pulling force F towards the axial center direction deviating from the outer pipeline, and the locking piece can be forced to move towards the axial center direction deviating from the outer pipeline by overcoming the tightening force Fr, so that the locking piece is changed from the locking state to the unlocking state.
The method of piercing a length of a hollow tube in a tube assembly 1c comprises the steps of:
s1: applying a pulling force F towards the direction deviating from the axis of the outer pipeline, so as to move the locking piece and enable the locking piece to be changed from a locking state to an unlocking state;
s2: maintaining the tension F of the step S1 while pulling the inner sleeve axially along the outer pipe to a desired length;
s3: press the latch fitting and cooperate the axial displacement interior sleeve pipe towards the axle center direction of outer pipeline for outer lug card is gone into between the locking tooth, and the latch fitting is changed into the latched state by the state of unblanking.
The puncture tube assembly 1c and the puncture tube assembly 1b can be switched in various lengths, and the switching methods of the puncture tube assembly and the puncture tube assembly are different. The method of switching the length of the puncture tube assembly 1c is relatively slightly complicated, but the locked state thereof is more securely maintained.
Those skilled in the art will readily appreciate that the spike assembly also requires a mating spike. The puncture needle penetrates through the puncture tube assembly to form a puncture outfit, then the puncture outfit and the puncture outfit penetrate through the abdominal wall through an incision arranged on the abdominal wall of a patient in advance to enter the body cavity, and then the puncture needle is taken away, and the inner pipeline is used as a passage for instruments to enter and exit 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 puncture tube component formed by the telescopic bottom shell component can be contracted into the shortest length at the initial position, and then is matched with the improved knife-free visual puncture needle to form the puncture device for penetrating through the abdominal wall, and the outer pipeline and the inner pipeline are rotated relatively after the puncture needle is taken away, so that the fixed depth of the puncture tube component on the abdominal wall is adjusted, and the external section (length H1), the body wall section (length H2) and the internal section (length H3) of the puncture tube component are ideally arranged. A retractable puncture needle can also be designed to match the retractable puncture tube 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 (4)

1. A hollow tube assembly for a surgical penetrator, characterized in that:
1) comprises an outer pipeline, an inner pipeline and a locking piece;
2) the outer tube includes an outer tube proximal end and an outer tube distal end and an outer tube wall extending therebetween, the outer tube wall defining a first hollow channel; the outer pipeline also comprises an axial tunnel arranged along the axial direction of the outer pipeline, the tunnel comprises a first tunnel side wall and a second tunnel side wall which are connected with the outer pipeline into a whole and a tunnel top wall connected with the first tunnel side wall, and the tunnel comprises a tunnel channel communicated with the first hollow channel;
3) the inner conduit comprises an inner conduit proximal end and an inner conduit distal end and an inner conduit wall extending therebetween, the inner conduit wall outer surface comprising an inner conduit outer cylindrical surface, the outer surface of the inner conduit proximal end comprising an outer bump; the inner pipeline is arranged in the outer pipeline, wherein the shape and the size of the outer cylindrical surface of the inner pipeline are matched with those of the first hollow channel, the outer lug is matched with the tunnel channel, the inner pipeline is limited to do rotary motion relative to the outer pipeline, and the inner pipeline can axially move relative to the outer pipeline;
4) the tunnel top wall comprises a radial cut communicating with the tunnel passage, the locking piece comprises a locking tooth matched with the radial cut in shape and size, and the locking piece is arranged on the outer side of the tunnel top wall, wherein the locking tooth is inserted into the radial cut;
5) the radial cuts comprise a plurality of radial cutting grooves which are uniformly arranged on the top wall of the tunnel along the axial direction of the outer pipeline;
6) the locking element including a locking element body proximal end and a locking element body distal end and a locking element body extending therebetween; the locking teeth extend outwards from the locking piece main body, the locking teeth are uniformly distributed along the length direction of the locking piece main body, and two adjacent locking teeth define a locking groove;
7) the lock comprises an unlocked state and a locked state; in a locking state, the locking piece moves towards the axis direction of the outer pipeline, so that the locking teeth enter the tunnel channel through the radial cutting groove; in an unlocking state, the locking piece moves towards the direction deviating from the axis of the outer pipeline, so that the locking teeth exit from the tunnel channel;
8) the hollow tube assembly comprises a locked state and a moved state; in the locking state, the locking piece is in a locking state, and the outer convex piece is limited between two adjacent locking teeth, so that the inner pipeline is limited to move axially relative to the outer pipeline; in the moving state, the locking piece is in an unlocking state, and the inner pipeline can axially move relative to the outer pipeline;
9) the operator can change the total length of the hollow tube component of the puncture tube component according to the thickness of the abdominal wall of a patient, the position and puncture angle of the puncture tube component and personal operation habits, so that the puncture tube component can be adjusted to a desired length position at one time.
2. A hollow tube assembly as claimed in claim 1, wherein: the locking piece comprises m locking teeth, wherein m is more than 3; the m locking teeth are uniformly distributed along the length direction of the locking piece main body, the distance between two adjacent locking teeth is X2, from the near end to the far end, the locking teeth are sequentially a first locking tooth, a second locking tooth … … and an mth locking tooth; the length of the hollow tube assembly comprises m-1 length settings; when the outer projections are matched with the first locking teeth and the second locking teeth, the length of the hollow tube assembly is Lt1, namely the initial length; when the outer lug is matched with the second locking tooth and the third locking tooth, the length of the hollow pipe assembly is Lt 2; by analogy, when the outer lug is matched with the (m-1) th locking tooth, the length of the hollow pipe assembly is Ltm-1(ii) a The inner pipe length Ltm-1The following relationship is satisfied:
Ltm-1=Lt1+（m-1）*X2；
wherein:
Ltm-1-length of the hollow tube assembly when the mth locking tooth is mated;
lt1 — length of the hollow tube assembly when the outer projections mate with the first and second locking teeth;
m is the serial number of the annular through groove;
x2-spacing of two adjacent locking teeth.
3. A hollow tube assembly as claimed in claim 2, wherein: the hollow tube assembly is switchable between a locked state and a displaced state.
4. The hollow tube assembly of claim 3, wherein: the locking piece sealing gasket comprises a locking piece sealing sheet body and a locking tooth sealing hole penetrating through the sheet body; the locking piece sealing gasket is adhered to the outer portion of the top wall of the tunnel, wherein the locking tooth sealing holes are basically aligned with the radial cutting grooves; and air seal is formed between the locking tooth sealing hole and the locking tooth, so that air in the outer pipeline is prevented from leaking through a fit clearance between the radial cutting groove and the locking tooth.
CN202010825843.0A 2020-08-17 2020-08-17 Hollow tube assembly for surgical puncture outfit Active CN111938777B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204141113U (en) * 2014-09-18 2015-02-04 苏州市欧陆杰电器有限公司 A kind of telescopic pipe external member
CN206473344U (en) * 2016-11-16 2017-09-08 哈尔滨理工大学 A kind of telescopic gripper type puncture biopsy needle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204141113U (en) * 2014-09-18 2015-02-04 苏州市欧陆杰电器有限公司 A kind of telescopic pipe external member
CN206473344U (en) * 2016-11-16 2017-09-08 哈尔滨理工大学 A kind of telescopic gripper type puncture biopsy needle

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