CN111685817B

CN111685817B - Hollow tube for medical extractor

Info

Publication number: CN111685817B
Application number: CN202010654328.0A
Authority: CN
Inventors: 曾国庆
Original assignee: Hangzhou Jieyi Medical Devices Co ltd
Current assignee: HANGZHOU JIEYI MEDICAL DEVICES Co.,Ltd.
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2022-03-25
Anticipated expiration: 2040-07-09
Also published as: CN111685817A

Abstract

The invention discloses a hollow tube for a medical extractor, which is characterized in that the hollow tube comprises an axis; the hollow tube comprises a distal tube portion having a diameter of D1, a middle tube portion having a diameter of D2, and a proximal tube portion having a diameter of D3, wherein D2 > D1, D2 > D3; the intermediate tube portion includes a plurality of elongated slots including an elongated side and a short side, the elongated side being substantially parallel to the axis.

Description

Hollow tube for medical extractor

Technical Field

The invention relates to a minimally invasive surgical instrument, in particular to a hollow tube for a medical extractor.

Background

In minimally invasive surgery (especially in hard-barreled surgery), it is often necessary to remove internal tissues or diseased organs through a small incision in the patient's skin or through a puncture catheter. How to safely and conveniently take out the tissue or the diseased organ in the cavity is always a difficult problem which troubles the minimally invasive surgery. Since the first clinical application of the endoscopic hard surgery, various special object obtaining bags for endoscopic surgeries are developed at home and abroad. Although the structure and the use of the bag are different, the general classification can be divided into two categories: the first category, single access bags. The invention of US5037379 discloses a single-side opening laced bag, which is used by grasping the bag with a grasper and passing through a puncture catheter or a small incision into the body of a patient. The second type is an article taking device comprising an article taking bag, a conduit and a stretching mechanism. US patent inventions US5465731, US patent No. US 5465404, US patent No. US6383197 disclose various get-out appliances, its get-out thing bag is rolled up and is taken and accomodate in the pipe, get-out appliance enter patient's body through puncture cannula while using, push its strut mechanism and push out the get-out thing bag that rolls up outside the pipe again, and strut the thing bag by strut mechanism, conveniently pack into the tissue or the pathological organ that cut in the operation.

The use cost of the fetching device with the opening mechanism is high due to the high manufacturing cost of the fetching device with the opening mechanism, and the fetching device with the opening mechanism is low in the developing country or the underdeveloped country. The single object taking bag is low in manufacturing cost, but when the single object taking bag is clinically applied, the single object taking bag is difficult to place into a patient body through a puncture device channel, and the single object taking bag is usually easy to cause secondary pollution before entering the patient body, or is damaged by an apparatus in the process of passing through the puncture channel, so that the single object taking bag is accidentally broken. The design and manufacture cost is low, and the fetching device which is safe to use has larger clinical application value.

Disclosure of Invention

In one aspect of the present invention, a hollow tube for a medical extractor is presented, the hollow tube comprising an axis; the hollow tube comprises a distal tube portion having a diameter of D1, a middle tube portion having a diameter of D2, and a proximal tube portion having a diameter of D3, wherein D2 > D1, D2 > D3; the intermediate tube portion includes a plurality of elongated slots including an elongated side and a short side, the elongated side being substantially parallel to the axis.

Preferably, the elongated slots are distributed at intervals along the axial direction to form row-shaped elongated slots; the long and narrow cutting grooves are circumferentially and uniformly distributed around the middle pipe part by taking the axis as an array center.

Preferably, the intermediate tube portion includes elongated slits arranged in 4 rows and having a symmetrical structure with the axis as a center of symmetry.

Preferably, two adjacent long and narrow limits limit and define the axial muscle, and two adjacent short sides limit and define horizontal muscle, and the width of axial muscle is greater than the width of horizontal muscle.

Preferably, the initial diameter of the distal tube portion of the hollow tube is equal to the diameter D2 of the intermediate tube portion and is reduced to diameter D1 by diameter D2 after heating, and the initial diameter of the proximal tube portion of the hollow tube is equal to the diameter D2 of the intermediate tube portion and is reduced to diameter D3 by diameter D2 after heating.

Preferably, the hollow tube is made of high-fluidity plastic into a thin-wall tube, so that the hollow tube has enough flexibility and can be bent and folded freely; according to the size of the stored object taking bag, the value of D2 is enough to enable the object taking bag to be stored in the middle pipe part in a fluffy state object taking bag bundle mode, and the value of D2 ensures that the middle pipe part and the object taking bag bundle stored in the middle pipe part can be contracted to be less than or equal to 10mm by peripheral extrusion.

In one scheme, a medical object taking device is provided, which comprises an object taking bag, wherein the object taking bag comprises a bag opening capable of being opened and closed and a bag body formed by extending from the bag opening, and the bag opening comprises a surrounding tunnel; the bag further comprises a binding wire, wherein the far end of the binding wire comprises a sliding joint, the far end of the binding wire penetrates through the tunnel, and the near end of the binding wire penetrates through the sliding joint to form a binding wire ring with the size approximately equal to that of the bag opening. The extractor also includes a hollow tube comprising a distal tube portion having a diameter D1, a middle tube portion having a diameter D2, and a proximal tube portion having a diameter D3, wherein D2 > D1, and D2 > D3.

In one embodiment, the bag and the tie are rolled or folded to form a strip bag bundle and are received in the middle tube portion of the hollow tube. The fetching bag is tightly curled (or folded) to form a tightly wrapped fetching bag bundle, the diameter of a circumscribed circle at the thickest position of the tightly wrapped fetching bag bundle is Dj, the length of the tightly wrapped fetching bag bundle is L, and the length of the middle pipe part is L2; wherein D2 is more than Dj is more than D1, and L is less than or equal to L2.

In yet another alternative, the hollow tube has a distal tube portion with an initial diameter equal to the diameter D2 of the intermediate tube portion and has been heated to a diameter D2 which narrows to a diameter D1, and a proximal tube portion with an initial diameter equal to the diameter D2 of the intermediate tube portion and has been heated to a diameter D2 which narrows to a diameter D3. In a specific scheme, D2 is more than 10.9mm, D1 is less than 10mm, and D3 is less than 10 mm.

In a further embodiment, the material and the wall thickness of the hollow tube are designed such that the hollow tube is sufficiently flexible to be bent and folded at will.

In one scheme, the fetching bag can form a tight state fetching bag bundle and a fluffy state fetching bag bundle, the diameter of a circumscribed circle at the thickest position of the tight state fetching bag bundle is Dj, the diameter of a circumscribed circle at the thickest position of the fluffy state fetching bag bundle is Ds, wherein Dj is more than D1, and Ds is more than or equal to 1.5 × Dj.

In another scheme, the object fetching bag is accommodated in the middle pipe part in a mode of fluffy object fetching bag bundle, wherein D2 is more than or equal to Ds.

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 a side view of the access bag 100 and the drawstring 50;

fig. 2 is an exploded view of the access bag 100 and the drawstring;

FIG. 3 is a schematic view of the retrieval bag being rolled in a parallel tunnel fashion;

FIG. 4 is a schematic view of the retrieval bag folded in a parallel tunnel fashion;

FIG. 5 is a schematic view of a strip-shaped bag bundle formed by the curling (folding) of the bags;

fig. 6 is a perspective view of the extractor 10;

fig. 7 is a diagram of a product package 1 of a taker;

FIG. 8 is a schematic illustration of a method of clinical application of the extractor 10;

fig. 9 is a schematic view of a hollow tube 200 a;

figure 10 is yet another schematic view of hollow tube 200 a;

FIG. 11 is an enlarged view of the hollow tube 200a, FIG. 10;

FIG. 12 is a further enlarged fragmentary view of hollow tube 200a FIG. 10;

figure 13 is a schematic illustration of a clinical application of hollow tube 200 a;

FIG. 14 is a schematic view of a hollow tube 200 b;

fig. 15 is a partially enlarged view of the hollow tube 200 b;

FIG. 16 is a schematic view of a hollow tube 200 c;

fig. 17 is a partially enlarged view of the hollow tube 200 c;

FIG. 18 is a schematic view of a hollow tube 200 e;

figure 19 is yet another schematic view of hollow tube 200 e;

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. 1-5 depict the structure and composition of a medical access bag 100. The bag 100 includes an openable and collapsible mouth 101 and an enclosed receptacle 102 extending from the mouth 101. The bag mouth 101 contains a tunnel 111 around the mouth. More specifically, the bag body 102 extends from the tunnel 111 to the bag bottom 105 in a direction away from the bag opening 110. The bag body 102 tapers distally from the mouth 101. However, one of ordinary skill in the art will appreciate that the pouch 101 may be configured in any other shape. The pouch 100 is typically made of a thermoplastic elastomer film. There are many thermoplastic elastomer films suitable for making bags including, but not limited to, TPEE (polyester thermoplastic elastomer), TPU (polyurethane thermoplastic elastomer), TPEE (polyamide thermoplastic elastomer), and the like. When the bag is used clinically, the pathological tissue is usually contained and taken out through a small incision on the skin of a patient. In order to prevent the pouch from causing additional unnecessary trauma to the incision (wound) of the patient, it is generally preferred that the pouch be made of a softer material. However, the softer the material of the bag, the lower its strength, which is likely to cause the bag to be crushed and broken when it is taken out through the wound. Preferably, the hardness Hard of the bag body of the object fetching bag is 80A or less and 95A or less. Generally, materials below 80A are not strong enough, while materials above 95A are too stiff and tend to cause unnecessary additional trauma to the wound of the patient.

The pouch 100 also includes a pull cord 50. The pull wire 50 includes a distal sliding joint 51 and a pull wire proximal end 53 and a pull wire cord 54 extending from the proximal end to the distal end. The distal portion of the pull wire 50 is passed through the tunnel 111 and the proximal end 53 of the pull wire is passed through the slip segment 51, forming a ligature loop 52 of approximately the same size as the pocket opening. Sliding the pull wire rope 54 in the sliding knob 51 by pulling the pull wire proximal end 53 may decrease the wire tie 52 until the bag mouth 101 is tightened.

Fig. 3 illustrates a method for forming a strip-shaped bag bundle by a curling method, in which the tunnel 111 of the bag 100 is folded in half and the bag 100 is folded in half; the bag body 102 is then rolled up with the bag bottom 105 towards the bag mouth 101. In this process, the bag bottom 105 is first formed into a small cylinder, and then rolled further to form a larger cylinder until it is rolled to fit snugly into the tunnel, forming a strip-like bag bundle. The method is to curl the bag bottom first, but can also be formed by rolling with the tunnel 111 as the axis. Fig. 4 illustrates a method of folding the bag 100 into a strip-shaped bag bundle, which includes folding the tunnel 111 of the bag 100 in half and folding the bag 100 in half; the bag body 102 is folded with the bag bottom 105 toward the bag opening 101. In the process, the bag bottom 105 is firstly folded to form a folding section, and further folded, the bag body 102 is folded for multiple times to form a wrinkle-shaped wrinkle body which is tightly attached to the tunnel 107 to form a strip-shaped bag fetching bundle. Figures 3-4 depict the method of crimping into a bundle of strip access bags in a generally parallel tunnel fashion, however the bundles of strip access bags may be crimped in a generally vertical tunnel fashion, or they may be crimped at an acute angle to the tunnel. The method is substantially the same, and the curling method can be easily understood by referring to fig. 3-4 in combination with the above description, and thus, the description thereof is omitted.

Referring now to fig. 6, in one aspect of the present invention, a medical extractor is provided, comprising the above-mentioned bag 100 and a hollow tube 200. The hollow tube 200 comprises a distal tube portion 210 having a diameter D1 and a length L1; a medial tube portion 230 of diameter D2 and length L2, and a proximal tube portion 250 of diameter D3 and length L3, wherein D2 > D1 and D2 > D3. Between the intermediate tube portion 230 and the distal tube portion 210 is included a first transition tube portion 220 of diameter D2 tapering from D1, and between the intermediate tube portion 230 and the proximal tube portion 250 is included a second transition tube portion 240 of diameter D2 tapering from D3.

As will be understood from reference to fig. 5 and 6, the bunch of tightly wrapped access pouches is referred to as a tightly wrapped bunch of access pouches when the access pouch 100 is tightly rolled (or folded). The diameter of the circumscribed circle at the thickest position of the wrapped object fetching bag bundle is Dj, and the length of the wrapped object fetching bag bundle is L. In one implementation, D2 > Dj > D1 and L ≦ L2, the bag 100 and the cable 50 are rolled or folded to form a strip bag bundle and received within the central tube portion 230 of the hollow tube.

In an alternative embodiment, the hollow tube comprises two states, an initial glass state and a contracted high elastic state, the hollow tube has an internal diameter in the initial glass state of D2, and is heated to cause the hollow tube to shrink by heat and transform the hollow tube into a contracted high elastic state having a diameter of D2, D3. In a detailed embodiment, the hollow tube 200 is made of medical grade material, such as medical grade LDPE (low density polyethylene), HDPE (high density polyethylene), PVDF (polyperfluoroethylene), FEP (perfluoroethylene propylene copolymer), and the like. The dimensions and wall thickness of the hollow tube 200 may be customized to the dimensions of the bag to be enclosed or selected from standard medical tubing that has been commercialized. It will be appreciated by those skilled in the art that the heat distortion temperature of the bag 100 and the drawstring 50 should be higher than the heating temperature for shrinking the hollow tube 200 into the hollow tube 200 a. The bag is made of thermoplastic elastomer material, the thermal deformation temperature is more than or equal to 130 ℃, the hollow tube is made of thermoplastic engineering plastic, and the temperature of the thermal shrinkage is controlled to be less than or equal to 125 ℃. The pull wire 50 is made of cotton or nylon, and the thermal deformation temperature of the pull wire is far higher than 125 ℃.

Referring now to fig. 6-7, an extractor product bag 1 includes an extractor 10 and a sterilization wrap 800. The extractor 10 is enclosed in the sterilization bag 800 and sterilized for administration to a patient.

The method for manufacturing the extractor product package is various, and the manufacturing steps of the extractor product package 1 are as follows:

s1, cutting the glass raw material with the diameter D2 into a hollow tube 200 with a proper size;

s2, the bag 100 and the pulling line 50 are curled or folded to form a tightly wrapped strip-shaped bag bundle and put into the hollow tube 200 at a proper position;

s3, heating the far end of the hollow tube to shrink the hollow tube into a far end tube part with the diameter of D1, and heating the near end of the hollow tube to shrink the hollow tube into a near end tube part with the diameter of D3;

s4, putting the extractor into a sterilized packaging bag and sealing the bag;

s5: sterilizing with ethylene oxide or irradiation.

The clinical application of the extractor product package 1 is convenient, and the use method of the extractor product package 1 comprises the following steps:

s1, tearing the sterilizing packaging bag open, taking out the object taking device in a sterile mode;

s2, inserting the distal tube part of the object taking device into the body of the patient through a first puncture device channel arranged on the abdominal wall of the patient, and exposing the proximal tube part outside the puncture device;

s3, inserting the endoscope grasping forceps into the patient body through the second puncture outfit channel, grasping the distal tube part to the patient body and pulling the middle tube part into the patient body through the first puncture outfit channel;

s4, switching the endoscopic grasper into endoscopic scissors to be inserted into the body of the patient through a second puncture outfit channel arranged on the abdominal wall of the patient, and cutting the endoscopic scissors along the joint of the first transition tube part and the distal tube part;

and S5, switching the endoscopic scissors into endoscopic graspers, namely inserting the graspers into the patient body through the second puncture outfit channel and grasping the object-taking bag, and pulling the object-taking bag out of the middle pipe part.

As will be appreciated by those skilled in the art, the conventional pushing method pushes the object-taking bag out of the tube covering the object-taking bag, because the object-taking bag is too soft, when the object-taking bag is pushed out, the pushing force cannot be transmitted to the other end, which usually results in the object-taking bag being locally compressed and stacked, and as the pushing force is deepened, the stacking is more and more, resulting in the case of blocking or damaging the object-taking bag. Above-mentioned draw and draw out thing bag of getting, the soft thing bag of getting can not be piled up to intraductal, and intraductal thing bag of getting is more and more few, therefore gets the release of thing bag easier, can not cause to get the thing bag stifled or damage.

In order to facilitate observation of the state of the object fetching bag contained in the hollow tube, in an optimized design scheme, the hollow tube is made of transparent plastic materials. In a further preferred embodiment, the material and wall thickness of the hollow tube 200 are designed such that it is sufficiently flexible to be bent and folded at will. In clinical applications, the position and angle of the first puncture device channel (91) and the second puncture channel (92) are uncertain, and thus the direction in which the bag is pulled through is uncertain. A semi-rigid or flexible hollow tube which can be bent at will is used, so that the tensile force can be applied conveniently. Meanwhile, the hollow tube has enough flexibility and can be bent and folded at will, and is convenient to be accommodated in the body of a patient.

In yet another preferred embodiment, the pouches 100 are formed into a bunch of pouches when rolled (or folded) into a strip, with the bunch of pouches being wrapped and the bunch being fluffed. The diameter of the circumscribed circle of the thickest position of the tightly wrapped object taking bag bundle is Dj, wherein Dj is larger than D1, and the object taking bag is accommodated in the middle pipe part in a fluffy object taking bag bundle mode, wherein D2 is more than or equal to 1.5 × Dj.

It will be appreciated by those skilled in the art that when the bag is made from a flexible thermoplastic elastomer film, and if it is stored in the inner tube in a wrapped state in which the bag bundle is stored for a prolonged period of time after sterilization (the sterilization expiration date of current disposable medical products is typically 5 years), the wrapped state bag bundle is stored for a prolonged period of time and, when applicable, is difficult to reopen in the patient using laparoscopic instruments. Some packages that are too tight, even better than the stress relaxation effect of the thermoplastic elastomer material, result in the bag films adhering to each other and failing to unfold again. Therefore, the bag bundle for taking the medicine is packaged in a fluffy state, and has excellent clinical application value.

Up to now, the object fetching bag or the object fetching device is generally designed to enter the body of a patient through a puncture device with the specification of 10mm, and the puncture devices with the specification of 10mm of different manufacturers have different channel apertures, but the aperture is between 10.5mm and 10.9 mm. The prior art designs typically design the object bag or extractor to have an outside diameter of 10.5mm or less. Such designs generally do not ensure that the pouches are stored in a bulky bundle.

In a further improved embodiment, the hollow tube is made of high-fluidity plastic into a thin-walled tube, and in a specific design scheme, the wall thickness Ht of the hollow tube is less than or equal to 0.1, so that the hollow tube has enough flexibility and can be bent and folded freely. Contrary to the prior art concept, the diameter D2 of the hollow tube is designed to be larger than 11 mm. According to the size of the object taking bag, the value of D2 is large enough to enable the object taking bag to be accommodated in the middle pipe part in a fluffy object taking bag bundle mode, and the value of D2 ensures that the middle pipe part and the object taking bag bundle accommodated in the middle pipe part can be contracted to be less than or equal to 10mm by peripheral extrusion. The detailed dimension design can be obtained through a plurality of tests according to the size of the accommodated fetching bag. The diameter D1 of the distal tube portion is designed to be less than 10mm to facilitate diameter insertion into and through the puncture channel.

Figures 9-12 depict yet another modified hollow tube 200 a. The hollow tube 200a comprises a distal tube portion 210a having a diameter D1 and a length L1; a medial tube portion 230a of diameter D2 and length L2, and a proximal tube portion 250a of diameter D3 and length L3, wherein D2 > D1 and D2 > D3. Between the intermediate tube portion 230a and the distal tube portion 210a is included a first transition tube portion 220a of diameter D2 tapering to D1, and between the intermediate tube portion 230a and the proximal tube portion 250a is included a second transition tube portion 240a of diameter D2 tapering to D3.

As shown in fig. 9, the middle tube portion 230a of the hollow tube 200a further comprises a plurality of elongated slots 260a, the elongated slots 260a comprising an elongated edge 261a and a short edge 265 a. The elongate edge 261a of the elongate slot 260a is substantially parallel to the axis of the hollow tube. The slits 260a are axially spaced apart from each other to form a row-shaped slit. Adjacent two short sides 265a define a transverse rib 280 a. The adjacent two elongated sides 261a define an axial rib 270 a. In the circumferential view, the slits 260a are circumferentially and uniformly distributed around the outer circumference of the middle tube portion with the axis as the center of the array, so as to form an even number of slits. In this example, 4 slits are formed in the outer periphery of the intermediate tube portion, that is, 4 rows of slits are formed along the axis. An even number of slits are formed in the outer periphery of the intermediate tube portion, mainly for convenience of manufacture. In one embodiment, the width of the axial rib 270a is greater than the width of the transverse rib 280 a. During specific design, the width of the axial rib 270a is more than 3 times of the width of the transverse rib 280a, so that the strength of the axial rib is far greater than that of the transverse rib.

Like the hollow tube 200, the hollow tube 200a has two states, an initial glass state and a contracted high elastic state, and the hollow tube has an internal diameter of D2 in the initial glass state, and is heated to shrink the hollow tube into a contracted high elastic state having a diameter of D2, D3. The hollow tube 200 is made of a high-fluidity medical grade material to form a thin-walled tube, and in a specific design scheme, the wall thickness Ht of the hollow tube is less than or equal to 0.1, so that the hollow tube has enough flexibility and can be bent and folded at will. Contrary to the prior art concept, the diameter D2 of the hollow tube is designed to be larger than 11 mm. According to the size of the object taking bag, the value of D2 is large enough to enable the object taking bag to be accommodated in the middle pipe part in a fluffy object taking bag bundle mode, and the value of D2 ensures that the middle pipe part and the object taking bag bundle accommodated in the middle pipe part can be contracted to be less than or equal to 10mm by peripheral extrusion. The detailed dimension design can be obtained through a plurality of tests according to the size of the accommodated fetching bag.

In yet another aspect of the present invention, an extractor product bag 1a (not shown, understood with reference to fig. 7) is provided, comprising an extractor 10a and a sterilization wrap 800. The extractor 10a is enclosed in the sterilization bag 800 and is sterilized for administration to a patient. The structure and composition of the extractor 10a and the extractor 10 are similar, and the hollow tube 200 is replaced by the hollow tube 200a to form the extractor 10 a.

Briefly, the article fetching device 10a comprises an article fetching bag 100, a binding line 50 and a hollow tube 200a, wherein the article fetching bag 100 and the binding line 50 are curled or folded to form a strip-shaped article fetching bag bundle, the strip-shaped article fetching bag bundle can form two states of a tight-state article fetching bag bundle and a fluffy-state article fetching bag bundle, the diameter of a circumscribed circle at the thickest position of the tight-state article fetching bag bundle is Dj, and Dj is larger than D1. The diameter D2 of the middle tube 230a of the hollow tube 200a is enough to allow the bag to be stored in the middle tube in a loose state. The distal tube portion 210a of the hollow tube 200a initially has a diameter equal to the diameter D2 of the intermediate tube portion 230a and has been heated to a diameter D2 which narrows to a diameter D1, and the proximal tube portion 250a of the hollow tube initially has a diameter equal to the diameter D2 of the intermediate tube portion 230a and has been heated to a diameter D3 which narrows to a diameter D2.

The extractor product package 10a may be manufactured in various ways, and the extractor product package 1a may be manufactured by the following steps:

s1, cutting the glass raw material with the diameter D2 into a hollow tube 200a with a proper size;

s2, blanking twice to form 4 long narrow cutting grooves so as to form an axial rib 270a and a transverse rib 280 a;

s3, the bag 100 and the pulling line 50 are curled or folded to form a tightly wrapped strip-shaped bag bundle and put into the hollow tube 200a at a proper position;

s4, heating the far end of the hollow tube to shrink the hollow tube into a far end tube part with the diameter of D1, and heating the near end of the hollow tube to shrink the hollow tube into a near end tube part with the diameter of D3;

s5, putting the extractor into a sterilized packaging bag and sealing the bag;

s6: sterilizing with ethylene oxide or irradiation.

The extractor product package 1a is convenient to apply clinically, and the use method of the extractor product package 1a comprises the following steps:

s2, inserting the distal tube part of the object taking device into the body of the patient through a first puncture device channel (91) arranged on the abdominal wall of the patient, and exposing the proximal tube part outside the puncture device;

s3, inserting the endoscope separation forceps (93) into the patient body through the second puncture outfit channel (92), grabbing the distal tube part to the patient body, and pulling the middle tube part into the patient body through the first puncture outfit channel (understood by referring to fig. 8);

s4, tearing off part of transverse ribs by using a cavity mirror separating clamp (understood by referring to FIG. 13);

and S5, pulling the object taking bag out of the middle pipe part by the endoscope separating forceps.

In combination with the foregoing, the fetching bag bundle packaged by the fetching device 10a is in a fluffy state, so that the reaction force to the hollow pipe wall is transverse, and therefore, the transverse rib can be designed to be weaker, and the fetching bag bundle can be easily torn by using a separating clamp. The specific value of the width of the transverse rib can be obtained through an experimental method. The width of the axial rib is designed to be the width of the transverse rib of the wall, so that the axial tensile strength is ensured to be enough. Meanwhile, most of the area of the middle tube part is cut by the long and narrow cutting groove, so that the contraction and deformation of the fetching device in the process of being pulled into the body of a patient through the puncture channel are facilitated, the pulling force is reduced, and the clinical application is more convenient.

Fig. 14-15 depict yet another modified hollow tube 200 b. The hollow tube 200b has substantially the same structure as the hollow tube 200a except for the arrangement of the slit grooves. The hollow tube 200b comprises a distal tube portion 210a having a diameter D1 and a length L1; a medial tube portion 230b of diameter D2 and length L2, and a proximal tube portion 250a of diameter D3 and length L3, wherein D2 > D1 and D2 > D3. Between the intermediate tube portion 230b and the distal tube portion 210a is included a first transition tube portion 220a of diameter D2 tapering to D1, and between the intermediate tube portion 230b and the proximal tube portion 250a is included a second transition tube portion 240a of diameter D2 tapering to D3.

The intermediate tube portion 230b of the hollow tube 200b also includes a plurality of elongated slots 260b, the elongated slots 260b including an elongated edge 261b and a short edge 263 b. The elongate edge 261b of the elongate slot 260b is substantially parallel to the axis of the hollow tube. The slits 260b are axially spaced apart from each other to form a row-shaped slit. Adjacent two short sides 265b define a transverse rib 280 b. The adjacent two elongated sides 261b define an axial rib 270 b. Wherein the width of the axial rib 270b is greater than the width of the transverse rib 280 b. During specific design, the width of the axial rib 270b is more than 3 times of the width of the transverse rib 280b, so that the strength of the axial rib is far greater than that of the transverse rib.

In a circumferential view, the outer circumference of the middle tube 230b is formed with a first row of slits, a second row of slits, a third row of slits, and a fourth row of slits in this order. The first and third rows of elongated slots are symmetrical about the axis, and the second and fourth rows of elongated slots are symmetrical about the axis. And two adjacent rows of the elongated slots are distributed in a staggered manner in the axial direction, and the formed transverse ribs 280b are not aligned. Any virtual section perpendicular to the axis is intersected with the middle pipe part, and the intersection line is a multi-section line and does not form a complete ring. Since the hollow tube 200b does not form a complete loop in a substantially perpendicular axis manner as compared to the hollow tube 200a, when the hollow tube is used in place of the hollow tube 200a in an extractor, it is advantageous in terms of contraction deformation during the process of pulling the extractor into the patient through the puncture channel, thereby reducing the pulling force and facilitating clinical use. The manufacturing method and the using method of the extractor and the product bag formed by replacing the hollow tube 200a with the hollow tube 200b are basically the same.

Fig. 14-15 depict yet another modified hollow tube 200 c. The hollow tube 200c has substantially the same structure as the hollow tube 200 b. The hollow tube 200c is formed by cutting the first row of elongated slits from the hollow tube 200b to form the transverse ribs 280 b. In brief, the hollow tube 200c includes the hollow tube 200b and further includes a transverse rib formed by cutting the first row of elongated slots, i.e., the individual elongated slots forming the first row of elongated slots are connected to form a complete closed slot, while the second, third and third rows of elongated slots are formed by spacing a plurality of elongated slots apart from each other and are not connected to each other. Similarly, a further modified hollow tube 200d (not shown) comprises hollow tube 200a and further comprises transverse rib slots for cutting transverse ribs formed by one of the rows of elongated slots. An arbitrary virtual cross section perpendicular to the axis of the hollow tube 200c (200 d) intersects the middle tube portion of the hollow tube 200c (200 d), and the intersection line is a multi-segment line and does not form a complete ring.

In yet another aspect of the present invention, an extractor product bag 1c (not shown, understood with reference to fig. 7) is provided, comprising an extractor 10c and a sterilization wrap 800. The extractor 10c is enclosed in the sterilization bag 800 and is sterilized for administration to a patient. The structure and composition of the extractor 10c and the extractor 10a are similar, and the hollow tube 200a is replaced by the hollow tube 200c to form the extractor 10 c.

The extractor product package 10c may be manufactured in various ways, and the extractor product package 1c may be manufactured by the following steps:

s1, cutting the glass raw material with the diameter D2 into a hollow tube 200c with a proper size;

s2, forming a first row of long and narrow cutting grooves and a first row of long and narrow cutting grooves by primary blanking, and forming a second row of long and narrow cutting grooves and a fourth row of long and narrow cutting grooves by secondary blanking, thereby forming axial ribs and transverse ribs;

s3, cutting off all transverse ribs in the first row of long and narrow cutting grooves;

s4, the bag 100 and the pulling line 50 are curled or folded to form a tightly wrapped strip-shaped bag bundle and put into the hollow tube 200a at a proper position;

s5, heating the far end of the hollow tube to shrink the hollow tube into a far end tube part with the diameter of D1, and heating the near end of the hollow tube to shrink the hollow tube into a near end tube part with the diameter of D3;

s6, putting the extractor into a sterilized packaging bag and sealing the bag;

s7: sterilizing with ethylene oxide or irradiation.

The extractor product bag 1c is convenient to apply clinically, and the use method of the extractor product bag 1c comprises the following steps:

s4, the endoscopic separating forceps are used for pulling the fetching bag out of the middle pipe part through the first row of long and narrow cutting grooves.

In combination with the above, the bag bundle packaged by the extractor 10c is in a fluffy state, so that the reaction force to the hollow tube wall is transverse, and therefore the transverse rib can be designed to be relatively weak, so that the material, the wall thickness, the cutting groove width and the length of the middle tube part can be reasonably selected, and the bag can be accommodated in the middle tube part in the manner of the fluffy state sample bag bundle without being automatically extruded from the first row of long and narrow cutting grooves. At the same time, the specimen bag can be easily pulled out of the middle tube portion through the first row of elongated slots using the laparoscopic separation forceps.

Figures 18-19 depict yet another modified hollow tube 200 e. The hollow tube 200e is similar to the hollow tube 200a in structure. The hollow tube 200e comprises a distal tube portion 210a having a diameter D1 and a length L1; a medial tube portion 230e of diameter D2 and length L2, and a proximal tube portion 250a of diameter D3 and length L3, wherein D2 > D1 and D2 > D3. Between the intermediate tube portion 230e and the distal tube portion 210a is included a first transition tube portion 220a of diameter D2 progressing to D1, and between the intermediate tube portion 230e and the proximal tube portion 250a is included a second transition tube portion 240a of diameter D2 progressing to D3.

The middle tube portion 230e of the hollow tube 200e also includes a plurality of angled cutouts 260 e. The oblique slot 260e forms an acute angle ANG1 with the axis of the hollow tube in the proximal direction. The oblique slots 260e are cut from the middle tube part to cut the tube wall from both sides alternately and transversely, and the cutting depth is more than half of the tube diameter (i.e. the cutting depth is more than 0.5 × D2), so as to form a plurality of spring-like connecting walls (as shown in fig. 18) formed by approximate 'S' shapes.

In yet another aspect of the present invention, an extractor product bag 1e (not shown, understood with reference to fig. 7) is provided, comprising an extractor 10e and a sterilization wrap 800. The extractor 10e is enclosed in the sterilization bag 800 and is sterilized for administration to a patient. The structure and composition of the extractor 10e and the extractor 10a are similar, and the hollow tube 200a is replaced by the hollow tube 200e to form the extractor 10 e.

The extractor product package 10e can be manufactured in various ways, and the extractor product package 1e is manufactured by the following steps:

s2, punching and forming inclined cuts 260e by using a die so as to form a plurality of spring-shaped connecting walls formed by approximate S shapes;

s5, putting the extractor into a sterilized packaging bag and sealing the bag;

s6: sterilizing with ethylene oxide or irradiation.

The clinical application of the extractor product package 1e is similar to that of the product package 1, and the use method of the extractor product package 1e comprises the following steps:

s4, switching the endoscopic graspers into endoscopic scissors which are inserted into the body of the patient through a second puncture outfit channel arranged on the abdominal wall of the patient and cut off along the oblique incision;

Compared with the extractor product bag 1, the middle pipe part of the hollow pipe 200e is a spring-shaped connecting wall (S-shaped connecting wall for short) formed by a plurality of approximate S shapes, and when the extractor is pulled to the inside of the body by using the grasping forceps, the S-shaped connecting wall is eccentric (deflection stress), so that the middle pipe part is stretched and compressed simultaneously, the fluffy specimen bag is compressed, and the extractor enters the inside of the body of a patient through a puncture channel.

The embodiments that have been illustrated include various features and methods of use, methods of manufacture. Those skilled in the art will appreciate that various features, methods of use and methods of manufacture can be superimposed on one another, substituted for, or substituted for, one another in order to create new arrangements.

In conclusion, the fetching bag and the fetching bag product package well solve the problems that when a single fetching bag is clinically applied, the single fetching bag is difficult to be put into a patient body through a puncture outfit channel, the single fetching bag is usually easy to cause secondary pollution before entering the patient body, or the single fetching bag is damaged by an instrument in the process of passing through the puncture channel, so that the single fetching bag is accidentally broken and the like. It should be understood by those skilled in the art that when the bag is successfully introduced into the patient and released out of the hollow tube, the subsequent operation of the bag for receiving tissue is well known and will not be described further.

Many different embodiments and examples of the invention have been shown and described. 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

1. A hollow tube for a medical extractor, wherein the hollow tube comprises an axis; the hollow tube comprises a distal tube portion having a diameter of D1, a middle tube portion having a diameter of D2, and a proximal tube portion having a diameter of D3, wherein D2 > D1, D2 > D3;

the intermediate tube portion comprising a plurality of elongate slots comprising an elongate side and a short side, the elongate side being substantially parallel to an axis,

the hollow pipe also comprises an object taking bag and a binding wire, the object taking bag and the binding wire are curled or folded to form a strip object taking bag bundle, and the strip object taking bag bundle and the binding wire are accommodated in the middle pipe part of the hollow pipe to form two states of a tightly wrapped object taking bag bundle and a fluffy object taking bag bundle; the diameter of a circumscribed circle at the thickest position of the bag bundle in the tightly wrapped state is Dj, wherein Dj is more than D1; the bag is accommodated in the middle tube part in a fluffy state, wherein D2 is more than or equal to 1.5 × Dj.

2. The hollow tube of claim 1, wherein: the long and narrow cutting grooves are distributed at intervals along the axial direction to form row-shaped long and narrow cutting grooves; the long and narrow cutting grooves are circumferentially and uniformly distributed around the middle pipe part by taking the axis as an array center.

3. The hollow tube of claim 2, wherein: the intermediate tube portion includes elongated slots arranged in 4 rows and having a symmetrical structure with the axis as the center of symmetry.

4. The hollow tube of claim 2, wherein: two adjacent long and narrow limits limit and define the axial muscle, and horizontal muscle is injectd to two adjacent minor faces, and the width of axial muscle is greater than the width of horizontal muscle.

5. The hollow tube of claim 2, wherein: the initial diameter of the distal tube portion of the hollow tube was equal to the diameter D2 of the intermediate tube portion and contracted from diameter D2 to diameter D1 after heating, and the initial diameter of the proximal tube portion of the hollow tube was equal to the diameter D2 of the intermediate tube portion and contracted from diameter D2 to diameter D3 after heating.

6. The hollow tube of claim 2, wherein the hollow tube is formed as a thin walled tube from a high flow plastic material, such that the hollow tube is sufficiently flexible to be bent and folded at will.