CN113229867B

CN113229867B - Medical object fetching bag suitable for customized production

Info

Publication number: CN113229867B
Application number: CN202110500722.3A
Authority: CN
Inventors: 刘贵容
Original assignee: Chongqing Chengyi Technology Co ltd
Current assignee: Anhui Tongfeng New Material Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2022-09-20
Anticipated expiration: 2040-07-03
Also published as: CN111685814B; CN113229867A; CN111685814A

Abstract

The invention discloses a medical object fetching bag suitable for customized production, which comprises a bag opening capable of being opened and closed and a bag body formed by extending from the bag opening, wherein the bag opening comprises a surrounding tunnel, and the bag body comprises a film bag surface, opposite folding edges, an inlet welding line, a main body welding line and a tail welding line; the pair of folded edges, the inlet welding line, the main body welding line and the tail welding line connect the films into a semi-closed bag-shaped whole body containing a bag opening; the tunnel comprises a bag opening welding seam; the bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are all linear welding seams.

Description

Medical object fetching bag suitable for customized production

The application is named as: a medical object fetching bag suitable for customized production is disclosed, and the application date is as follows: year 2020, month 07, 03, application number: 202010637402.8 patent application for inventions.

Technical Field

The invention relates to minimally invasive surgical instruments, in particular to an object taking bag and an object taking device.

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 lesion organ in the cavity is always a difficult problem troubling 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 No. 5465731, US patent No. 5480404, US patent No. 6383197 and other U.S. patent application disclose various fetching devices, wherein the fetching bag is rolled up and contained in the catheter, and when in use, the fetching device enters the body of a patient through the puncture cannula, and then the opening mechanism is pushed to push the rolled fetching bag out of the catheter, and the opening mechanism opens the fetching bag, thereby facilitating the loading of tissues or diseased organs cut in an operation.

The bag is usually made of 0.05mm to 0.1mm plastic film or plastic sheet. Up to now, it has been difficult to manufacture bags in an integral manner, generally by heat-sealing (welding) two sheets of film one on top of the other, or by heat-sealing (welding) a single sheet of film folded in half. It should be understood by those skilled in the art that the heat seal (welding) seam of the object bag is long, and due to factors such as fixture error of the heat seal (welding) tool, pressure error of the heat seal (welding), non-uniform temperature of the heat seal (welding) tool, etc., defects such as local gaps or local insecure seams are easily generated, and it is difficult to select products containing such defects by inspection means. In mass production, excessive welding is usually achieved by raising the heat-sealing (welding) temperature and increasing the heat-sealing (welding) time, so as to ensure that the joint is firm and has no residual gap. However, excessive welding often results in a significant thinning of the access pouch film substrate in the local area where the seam is located, which results in a significant reduction in material strength in the vicinity of the seam and is highly susceptible to breakage, a phenomenon commonly referred to as "undercut".

One of ordinary skill will appreciate that increasing the film thickness enhances the access pouch, however, when the access pouch is used in the access device described above, increasing the film thickness often results in the access pouch not being contained within or pushed out of the tube due to the size limitations of the tube. The maximum thickness of the film of the bag of the prior art is usually less than or equal to 0.1mm, and the excessive welding usually causes the thickness of the local area to be reduced by 30 to 50 percent, thereby obviously reducing the strength of the bag. Up to now, the probability of the accident of breaking the fetching bag in clinical use is still large.

On the other hand, with the deep development of minimally invasive surgery (especially hard-tube endoscopic surgery), the types of surgery are increasing, and the surgery is more and more complicated. The problem of the minimally invasive surgery is solved by taking out the pathological tissue. Generally, the surgeon wants to precisely select an appropriate size of an access bag (an access device) according to the size of the lesion tissue, the access site, and the like, so as to cause minimal damage to the wound of the patient during the access procedure. However, as mentioned above, the bag-taking process is a special process, and the factors such as the clamp error of the heat-sealing (welding) tool, the pressure error of the heat-sealing (welding), the non-uniform temperature of the heat-sealing (welding) tool and the like are strictly controlled, which causes the high cost of customizing the bag-taking with different sizes in small batches, and no person or organization proposes or provides a feasible customized product or scheme for the bag-taking.

Disclosure of Invention

In one aspect of the invention, a medical access bag for custom manufacture is provided, including a bag mouth that can be opened and closed, the bag mouth including a surrounding tunnel, and a bag body extending from the bag mouth. The bag body comprises a film bag face, a folded edge, an inlet welding line, a main body welding line and a tail welding line. The pair of folds, the inlet weld, the body weld and the tail weld connect the membranes into a semi-enclosed bag-like whole containing a bag opening. The tunnel contains a bag mouth weld. The bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are all linear welding seams. In one scheme, the bag mouth welding seam, the inlet welding seam, the main body welding seam and the tail welding seam can be manufactured by a same welding mould through multiple times of welding processing. In yet another aspect, the inlet weld comprises an inboard inlet weld edge and an outboard inlet weld edge, and the body weld comprises an inboard body weld edge and an outboard body weld edge; the main body weld joint and the inlet weld joint form a cross joint which does not intersect with the inner side main body weld edge, and the outer side main body weld edge and the inner side inlet weld edge form an intersection point. In another scheme, the body welding seam extends from the intersection point position to the bag opening direction continuously to form a cantilever welding seam with the length X2. In a specific embodiment, X2 is greater than or equal to 1 mm.

In yet another aspect of the invention, a medical access bag adapted for custom manufacture is provided, including a bag opening that can be opened and closed, the bag opening including a surrounding tunnel, and a bag body extending from the bag opening. The bag body comprises a film bag surface, a folded edge, an inlet welding line, a main body welding line and a tail welding line; the pair of folds, the inlet weld, the body weld and the tail weld connect the membranes into a semi-enclosed bag-like whole containing a bag opening. The tunnel contains a bag mouth weld. The bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are all linear welding seams. In one scheme, the widths of the bag mouth weld joint, the inlet weld joint, the main body weld joint and the tail weld joint are the same. In another scheme, the bag mouth welding seam, the inlet welding seam, the main body welding seam and the tail welding seam can be manufactured by multiple times of welding processing of the same welding die and the same processing parameters. In yet another aspect, the inlet weld comprises an inner inlet weld edge and an outer inlet weld edge, and the body weld comprises an inner body weld edge and an outer body weld edge; the main body weld joint and the inlet weld joint form a cross joint which does not intersect with the inner side main body weld edge, and the outer side main body weld edge and the inner side inlet weld edge form an intersection point. In another scheme, the body welding seam extends from the intersection point position to the bag opening direction continuously to form a cantilever welding seam with the length X2. In a specific embodiment, X2 is greater than or equal to 1 mm.

In yet another aspect of the present invention, a medical access bag suitable for custom manufacture is provided, comprising a bag mouth that can be opened and closed, the bag mouth comprising a surrounding tunnel, and a bag body extending from the bag mouth, the bag body comprising a film bag face, opposing flaps, an inlet weld, a body weld, and a tail weld; the pair of folded edges, the inlet welding line, the main body welding line and the tail welding line connect the films into a semi-closed bag-shaped whole body containing a bag opening. The tunnel contains the sack welding seam, the entry welding seam, main part welding seam and afterbody welding seam all are linear type welding seams. In one scheme, the bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam can be formed by multiple times of welding processing of the same welding mould. In another embodiment: the folded edge and the inlet welding line define an inlet bag and an outlet bag, the folded edge and the main body welding line define a main body bag, and the folded edge and the tail welding line define a tail bag; the size setting of the object fetching bag satisfies the following relational expression:

2*(B1-B2)≥H1≥0.5*(B1-B2)；

2.5*H1≥H2≥1.5*H1；

wherein:

b1 is the width of the bag opening 201;

b2 is the width of the mouth of the body bag 202B;

the depth dimension of H1 inlet bag 202a along the opposing flaps;

h2 body bag is along the depth dimension of the opposing flaps.

In yet another aspect, the inlet weld comprises an inboard inlet weld edge and an outboard inlet weld edge, and the body weld comprises an inboard body weld edge and an outboard body weld edge; the main body weld joint and the inlet weld joint form a cross joint which does not intersect with the inner side inlet weld edge, and the outer side inlet weld edge and the inner side main body weld edge form an intersection point. In yet another aspect, the inlet weld extends from the intersection location further into the bag to form a cantilever weld having a length X1. In one embodiment, X1 is greater than or equal to 1 mm.

In yet another aspect of the present invention, a medical access bag for minimally invasive surgery is provided, comprising a bag opening capable of being opened and closed, the bag opening comprising a surrounding tunnel, and a bag body extending from the bag opening, the bag body comprising a film bag face, a folded edge, an inlet weld, a body weld and a tail weld; the pair of folded edges, the inlet welding line, the main body welding line and the tail welding line connect the films into a semi-closed bag-shaped whole body containing a bag opening; the tunnel comprises a bag opening welding seam; the bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are all linear welding seams. In one approach, the width of the pocket weld is greater than the width of the inlet weld and/or the body weld. In another scheme, the bag mouth welding seam, the inlet welding seam, the main body welding seam and the tail welding seam can be manufactured by a same welding die and a same welding parameter through multiple welding processes. In another scheme, the folded edge and the inlet welding line define an access pocket, the folded edge and the main body welding line define a main body pocket, and the folded edge and the tail welding line define a tail pocket; the size of the object fetching bag is set to satisfy the following relational expression:

2*(B1-B2)≥H1≥0.5*(B1-B2)；

2.5*H1≥H2≥1.5*H1；

wherein:

b1 is the width of the bag opening 201;

b2 is the width of the mouth of the main bag 202B;

the depth dimension of H1 inlet bag 202a along the opposing flaps;

h2 body bag is along the depth dimension of the opposing flaps.

In yet another aspect, the inlet weld comprises an inboard inlet weld edge and an outboard inlet weld edge, and the body weld comprises an inboard body weld edge and an outboard body weld edge; the main body weld joint and the inlet weld joint form a cross joint which does not intersect with the inner side inlet weld edge, and the outer side inlet weld edge and the inner side main body weld edge form an intersection point. And the inlet welding seam extends from the intersection point position to the inside of the bag body to form a cantilever welding seam with the length of X1. In a specific embodiment, X1 is greater than or equal to 1 mm.

In a further aspect of the invention, there is provided an extractor for use in minimally invasive surgery comprising any one of the bags described above, further comprising a catheter assembly and a handle assembly extending therethrough, and a bag spreader mechanism connected to the handle assembly for spreading the bag, the bag spreader mechanism and bag spreader mechanism being disposed within the catheter assembly and axially movable relative thereto; the bag taking and the opening mechanism are pushed forwards in the catheter component by operating the handle component, extend out of the sleeve component and are opened by the opening mechanism; the opening mechanism is drawn out backwards along with the catheter component and separated from the fetching bag, and the pull wire penetrates through the catheter component.

In another aspect of the invention, a single-use bag for taking articles is provided, which comprises any one of the bags, a sterilizing packaging bag and a label; the fetching bag is sealed in the sterilizing packaging bag and is sterilized by ethylene oxide or irradiation to reach the aseptic level; the label contains necessary regulation information, also contains a structural schematic diagram of the bag and records the width B1 of the opening of the bag and the width B2 of the opening of the main bag; the depth dimension of the inlet bag along the opposing flaps H1; the body pocket is along the depth dimension H2 of the opposing flaps.

In a further aspect of the invention, there is provided a method of manufacturing any of the foregoing bags, the method comprising the steps of:

s1, cutting the film bag face raw material to form a film bag face with a proper size, folding one side of the film bag face and putting the film bag face into welding equipment (a die) to start welding to form a bag mouth welding line and a tunnel;

s2, folding the welded film bag surface along the center line to form a folded edge;

s3, putting the folded film bag surface into a welding mould to start welding to form a main body welding line;

s4, putting the folded film bag surface into a welding mould to start welding to form an inlet welding line;

s5, putting the folded film bag surface into a welding mould to start welding to form a tail welding line;

and S6, cutting along the welding line, and removing the redundant leftover materials outside the bag body to form the bag.

s1, cutting the raw material of the film bag surface to form a film bag surface with a proper size, folding one side of the film bag surface and putting the folded film bag surface into a welding mould, and starting welding to form a bag opening welding line and a tunnel;

s3, putting the folded film bag surface 203 into a welding mould to start welding to form an inlet welding seam;

s4, putting the folded film bag surface into a welding mould to start welding to form a main body welding line;

and S6, cutting along the edge of the welding line, and removing the redundant leftover materials outside the bag body to form the object-taking bag.

In a further aspect of the invention, a method for manufacturing a bag for access is proposed, characterized in that the manufacturing steps are as follows:

s3, one end of the welding mould is aligned with the top end of the cantilever to form the cantilever welding seam as a starting point, the other end extends out of the bag body, the welding seam which is connected with the cantilever welding seam into a whole is firstly completed, then the other welding seam which is intersected with the welding seam is completed, and finally the welding of the tail welding seam is completed;

and S4, cutting along the welding seam or along the outer edge of the welding seam, and removing the excess leftover materials outside the bag body so as to form the bag.

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 perspective view of a first embodiment extractor device of the present invention in a retracted state;

FIG. 2 is a perspective view of the extractor instrument of FIG. 1 in a deployed state;

FIG. 3 is an exploded view of the extractor instrument of FIG. 2;

FIG. 4 is a simulated view of the pouch opening closure of the extraction instrument of FIG. 2 in use;

FIG. 5 is a simulated view of the extraction instrument of FIG. 4 with the catheter and distraction mechanism removed;

FIG. 6 is a schematic diagram of a heat-sealing process in a prior art heat-sealing machine;

fig. 7 is a perspective view of a prior art access bag 100;

figure 8 is a cross-sectional view 8-8 of the access bag of figure 7;

FIG. 9 is a schematic illustration of a weld joint failure mode being weld edge peel;

FIG. 10 is a schematic view of a weld joint failure mode being a fracture of the transition zone;

fig. 11 is a cross-sectional view 11-11 of the access bag of fig. 7;

FIG. 12 is a side projection view of the first embodiment access bag 200;

FIG. 13 is a schematic view of a welding die and welding apparatus;

FIG. 14 is a schematic view of a tunnel weld;

FIG. 15 is a schematic illustration of a welding manufacturing process of the specimen bag 200;

fig. 16 is a schematic view of a welding manufacturing process of the specimen bag 300;

FIG. 17 is an enlarged view 17-17 of the interface joint 260 of FIG. 15;

FIG. 18 is an enlarged view of a modified interface joint 260 a;

FIG. 19 is an enlarged view of a modified interface joint 260 b; (ii) a

Fig. 20 is a schematic view of a first access pouch product package 800.

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. 1-3 depict in detail the structural components of the extractor instrument 10. Briefly, the retrieval device 10 comprises, in order from the distal end to the proximal end, a retrieval bag 100, a distraction mechanism 20, a catheter assembly 30, a handle assembly 40 and a ligature 50. The catheter assembly 30 includes a hollow catheter 33 and a

catheter handle portion

31 and 32 fixedly coupled thereto. The hollow catheter 33 has different outer diameters for different clinical applications, and the common diameters are roughly divided into 5mm, 8mm, 10mm, 12mm and 15 mm. The handle assembly 40 includes a finger ring 42 and a hollow drive rod 41 connected in series from a proximal end to a distal end, the drive rod 41 being positioned within the hollow catheter 33 and being axially movable relative to the hollow catheter 33 to move the deployment mechanism 20 and the retrieval bag 100 between a retracted state (fig. 1) and an extended state (fig. 2).

The distracting mechanism 20 comprises an elastic body 21 and a connecting shaft 22 connected to a proximal end of the elastic body 21, the elastic body 21 comprising two substantially flexible or

elastic bands

23 and 24, the

elastic bands

23 and 24 being substantially identical in shape and symmetrically disposed along the connecting shaft 22. The

elastic bands

23 and 24 comprise proximal straight segments 23b and 24b and distal

elastic segments

23a and 24a, and the

elastic segments

23a and 24a have flexibility and shape memory functions and can be deformed and stored under external force and automatically opened when external force is removed. The proximal end of the straight line section 23b is provided with an installation hole 23c, the proximal end of the straight line section 24b is provided with an installation hole 24c, the connecting shaft 22 is provided with a shaft hole 22a corresponding to the installation hole 24c and the installation hole 23c, and the elastic band 23 and the elastic band 24 are riveted on the connecting shaft 22 through a rivet 25. The proximal end of the connecting shaft 22 is inserted into the distal end of the driving rod 41 and is fixed by gluing, screwing or welding. It will be appreciated by those skilled in the art that the connection between the elastic body 21 and the connection shaft 22 may be welding, pinning or directly connecting and fixing the elastic body 21 to the distal end of the driving rod 41.

The bag 100 includes an openable and closable bag opening 101 and an enclosed receptacle 102 extending from the bag opening 101. The bag mouth 101 includes a tunnel 111 surrounding the bag mouth, the tunnel 111 being configured to receive the opening mechanism 20 and the cable 50. Referring to fig. 2-3, the distal end of the cable 50 includes a sliding knot 51, the distal end of the cable 50 passing through the tunnel 211 and the proximal end 53 passing through the sliding knot 51 forming a cable loop 52 of approximately the same size as the mouth of the bag. The elastic body 21 is inserted into the tunnel 111. After the extractor device 10 is assembled (see fig. 2), the extractor bag 100 is usually wrapped around the elastic body 21 and is accommodated in the hollow tube 33 (see fig. 1). The invention of US patent 8986321 discloses various winding and storage modes of the fetching device, and other fetching devices are specifically disclosed, and one of ordinary skill can apply the invention with slight modifications.

In this embodiment, the elastic body 21 has a shape memory function, and the winding and storage manner of the fetching device 10 can be conveniently and automatically unfolded. The operator pushes the driving rod 41 to push the bag 100 and the opening mechanism 20 out of the hollow tube 33 in the retracted state (fig. 1), and the elastic body 21 has a shape memory function to automatically recover, thereby automatically opening the bag 100 (fig. 2). It will be appreciated by those skilled in the art that the

elastic bands

23 and 24 of the elastic body 21 may be provided as a linkage mechanism to achieve the spreading action. While the distraction mechanism 20, catheter assembly 30, and handle assembly 40 of a typical extraction instrument 10 have been described in this embodiment, those skilled in the art will appreciate that alternative combinations of the distraction mechanism 20, catheter assembly 30, and handle assembly 40 of the present embodiment with U.S. patent nos. 5465731, 6383197, 8721658, etc. are also within the scope of the present invention.

The operation of the extractor device 10 in clinical application can be generally divided into the following stages:

in the first stage: a preliminary stage. The retrieval device in a retracted state is inserted into the patient via the puncture cannula and extends to the target area. And a second stage: and (3) a fetching instrument unfolding stage. The operation handle assembly 40 controls the driving rod 41 to move axially relative to the hollow conduit 33 from the proximal end to the distal end until the opening mechanism 20 and the bag 100 are completely exposed out of the hollow conduit 33, and the elastic body 21 has the shape memory function and is automatically restored, so that the bag 100 is automatically opened (fig. 2). And a third stage: and (5) cutting off the specimen. The fetching device 10 in the unfolded state is positioned below the position of the lesion tissue or organ by an endoscope or the like, and the lesion tissue or organ is cut off by the surgical scissors and falls into the fetching bag 100. The fourth stage, specimen taking-out stage. Referring to fig. 4-5, handle assembly 40 is first operated to withdraw spreader mechanism 20 through the puncture cannula and simultaneously pull on proximal end 53 of cable 50, causing sliding knob 51 to slide and contract cable loop 52, thereby collecting the mouth 101 of bag 100. The cable 50 is then pulled to withdraw the bag 100 and the specimen contained therein via the puncture cannula or via a skin incision. In this process, since the inner diameter of the puncture cannula or the incision of the minimally invasive surgery is small, the extraction bag 100 is subjected to a large pressing force when a large tissue or organ is excised. Although the various extraction instruments vary in structure and application, their function and primary procedure of use are generally the same. The clinical application of the extractor device 10 according to the invention can also be understood with reference to the description in US5465731, in order to better understand the use of the invention.

Fig. 7 depicts the structure and composition of the access bag 100 in more detail. The pouch 100 is typically formed by fold welding a single sheet of film (sheet) or by overlap welding two sheets of film (sheets). Materials for the film (sheet) include, but are not limited to, polyethylene, polyvinyl chloride, polypropylene, nylon, teflon, thermoset elastomers (e.g., silicone) and thermoplastic elastomers (e.g., polyurethane). Processes for thin film (sheet) welding include, but are not limited to, heat welding, ultrasonic welding, high frequency welding, radiation welding, pulse welding, and the like. The pouch 100 of this example is formed by heat welding two polyethylene films one on top of the other.

Figure 6 depicts a typical heat welding (heat sealing for short) process of the prior art for the manufacture of bags for access. The heat sealing machine 60 comprises a base 66 fixedly installed on the ground, a machine body 67 connected with the base, an upper heat sealing movable die 64 connected with the machine body 67 and capable of moving in the vertical direction, and a lower heat sealing fixed die 65 fixedly connected with the machine body 67. The heat sealing process of the object obtaining bag 100 can be simply stated as adjusting heat sealing parameters (mainly including heat sealing temperature, heat sealing time and heat sealing pressure), overlapping the film 103 and the film 104 and placing the films on the lower heat sealing fixed die 65, and finally starting the heat sealing machine to complete the heat sealing welding of the object obtaining bag 100.

It will be appreciated by one of ordinary skill that the films are heat sealed (welded), i.e., in a molten state, the polymer segments on the surfaces of the sealed regions of the films interdiffuse, penetrate, and entangle, causing the two (or more) films to fuse together. Referring to fig. 7, the bag face 103 and the bag face 104 are welded to each other to form an access bag 100 including a heat-sealed seam 105. Fig. 8 depicts a partial cross-sectional view of any location of heat-seal seam 105, i.e., pouch 100 may be more finely divided into film substrate 131 (film substrate 151), transition region 132 (transition region 152), and weld region 133 (weld region 153). In the film sealing process, the film in the molten state in the sealing region is calendered and extruded under the sealing pressure, thereby forming the transition region 132 (transition region 152). The film thickness of the transition region 132(152) is smaller than that of the film substrate 131 (151).

Referring to FIGS. 8-11, generally, the heat-sealed seams can be classified into an under-heat seal, a standard heat seal and an over-heat seal, depending on the heat-seal strength and failure mode of the weld region and the transition region. The undersealing, i.e. the thickness of the film which is fused on the surface of the heat-sealing area and participates in heat sealing, is thin, the failure mode in the heat-sealing strength test is that the welding area is stripped, and the test result is lower than the target value. The standard heat sealing is that the thickness of the film which is fused on the surface of the heat sealing area and participates in the heat sealing is moderate, the failure mode is that the welding area is stripped, and the heat sealing strength test result reaches a target value. The over-sealing, i.e. the surface of the sealing area is melted and the thickness of the film involved in the sealing is too much, results in a significant thinning of the thickness of the transition area, so that the structural strength of the transition area is significantly lower than the peel strength of the welded area, a phenomenon commonly referred to as "undercut" for short, whereas the failure mode is the breakage of the transition area, the sealing strength test results being lower than the target value. In addition, in the standard heat seal, the heat seal seam with the largest heat seal strength test value is called the optimal heat seal seam. One of ordinary skill will appreciate that different sealing parameters are used to determine whether the sealed seam 105 is under-sealed, standard sealed or over-sealed.

One of ordinary skill will readily appreciate that the optimum sealing parameters required for a standard seal can be obtained experimentally. In the field of food packaging and medical packaging, particularly in the field of blood product packaging bag manufacture, there has been much research on heat sealing of plastic films. The prior art disclosed shows that, in general, the combined effect of sealing temperature, sealing pressure and sealing time determines the sealing quality of the plastic film, and that the sealing temperature has the greatest effect on the sealing quality, and that the effect of sealing pressure and sealing time on said sealing quality is relatively small or negligible.

When the bag is actually manufactured, the heat sealing process of the bag is monitored and managed as a special process, and before production, special process confirmation (including IQ, OQ and PQ) is required, and the production process is strictly managed according to parameters confirmed by the special process.

IQ installation confirmation: for example, the installation of the heat sealing machine 60 is confirmed, and then the installation of the heat sealing movable die 64 and the heat sealing fixed die 65 is confirmed. The installation of the heat-sealing movable die 64 and the heat-sealing fixed die 65 confirms that the main work is the leveling work of the movable die and the fixed die, and the process is quite complex and consumes a great deal of labor and time. Particularly under the condition of long and narrow and complex welding lines, the relative parallelism of a movable mold and a fixed mold is difficult to ensure due to errors of a working table of a heat sealing machine and processing errors of a mold, and the relative parallelism needs to be ensured by means of repeated debugging and trial welding of workers. IQ installation can be verified by OQ operation, namely the best heat-seal temperature is found by welding certain batches of object obtaining bags. And after the optimal heat sealing temperature is determined, performing a PQ performance test, namely performing batch test production of more than three batches at the optimal heat sealing temperature, and when the heat sealing strength test value proves that all production samples are in standard heat sealing, completing PQ verification. So that the product can be produced. If the mold is replaced, IQ confirmation, mainly leveling verification of the mold, must be performed again. The above-mentioned OQ and PQ are based on the verification under a specific mold and mounting conditions, and the OQ and PQ should be re-verified due to a change in the mold and its mounting conditions. This results in high cost for small quantities of access bags of different sizes, and no person or organization has so far proposed or provided a practical access bag customization product or solution.

Fig. 12 illustrates the structure and composition of the first embodiment access bag 200 of the present invention in detail. The bag 200 comprises a bag opening 201 which can be opened and closed and a bag body 202 extending from the bag opening, wherein the bag opening 201 comprises a surrounding tunnel 211 and a bag opening welding line 212. The bag body 202 includes a film bag face 203, a hem 220, an inlet weld 230, a body weld 240, and a tail weld 250. The flaps 220, inlet welds 230, body welds 240 and tail welds 250 connect the film bag face 203 into a semi-enclosed bag-like whole containing the bag mouth 201. Wherein the opposing flap 220 and the entrance weld 230 generally define the access pocket 202a, the opposing flap 220 and the body weld 240 generally define the body pocket 202b, and the opposing flap 220 and the tail weld 250 generally define the tail pocket 202 c.

In one embodiment, the pocket weld 212, the inlet weld 230, the body weld 240, and the tail weld 250 are all straight welds. In a specific embodiment, the pocket weld 212, the inlet weld 230, the body weld 240, and the tail weld 250 have the same weld width. In a detailed embodiment, the pocket weld 212, the inlet weld 230, the body weld 240, and the tail weld 250 are made by multiple welding processes with the same welding tool.

In one embodiment, when bag 200 is in the flat, folded-in-half position shown in fig. 12, bag opening weld 212 has a length of B0, bag opening 201 has a width of B1, and bag opening width of body bag 202B is B2. The inlet weld 230 has a length L1, the inlet weld 230 forming an angle ANG1 with the opposing edge 220; the length of the body weld 240, L2, the body weld 240 forming an included angle ANG2 with the opposing edge 220; the tail weld 250 forms an angle ANG3 with the opposing edge. Pocket 202a has a depth dimension H1 along the opposing flap and the main pouch has a depth dimension H2 along the opposing flap.

The bag 200 may be manufactured in a variety of ways, as shown in fig. 13-15, and the steps of manufacturing a bag 200 are generally as follows:

s1, cutting the film bag face raw material to form a film bag face 203 with a proper size, folding one side of the film bag face 203, putting the folded film bag face into welding equipment (a mold), and starting welding to form a bag mouth welding seam 212 and a tunnel 211 (as shown in FIG. 14);

s2, folding the welded film bag surface 203 along the center line to form a folded edge 220;

s3, putting the folded film bag surface 203 into a welding device (mold) to start welding to form an inlet welding line 230;

s4, putting the folded film bag surface 203 into welding equipment (a mold) to start welding to form a main body welding seam 240;

s5, putting the folded film bag surface 203 into welding equipment (a mold) to start welding to form a tail welding seam 250;

and S6, cutting along the edge of the welding seam, and removing the excess leftover materials outside the bag body 202 to form the bag 200.

As can be appreciated from fig. 13 and the foregoing, the pocket weld 212, the inlet weld 230, the body weld 240, and the tail weld 250 may all be made using the same welding equipment, the same welding die, and the same welding parameters. It will be appreciated by those skilled in the art that by translating and rotating the inlet weld 230, the body weld 240 and the tail weld 250, various sized access bags may be formed. The fetching bags with different shapes and sizes can be customized by using the same welding equipment, the same welding mould and the same welding parameters.

Studies have shown that, in the clinical application of the extraction bag, the width B1 of the mouth of the extraction bag, the width B2 of the mouth of the main bag, the volume of the inlet bag and the main bag are the most significant parameters for the clinical application of the extraction bag. The bag opening width B1 of the object-taking bag determines whether the excised tissue can easily fall into the object-taking bag in clinical application, and simultaneously ensures that the excised part has enough space to accommodate the opening width of the object-taking bag. The width B2 of the main bag mouth determines whether the cut tissue can smoothly enter the object-taking bag, and meanwhile, when the object-taking bag is pulled out of the wound of the patient, the damage to the wound of the patient is related to the width B2 of the main bag mouth. In a specific embodiment, the object-taking bags are dimensioned with reference to B1, B2, H1 and H2, and in a preferred embodiment, the object-taking bags are dimensioned such that they satisfy the following relationship:

2*(B1-B2)≥H1≥0.5*(B1-B2)；

2.5*H1≥H2≥1.5*H1；

wherein

B1 is the width of the bag opening 201;

b2 is the width of the mouth of the main bag 202B;

the depth dimension of H1 inlet bag 202a along the opposing flaps;

h2 body bag is along the depth dimension of the opposing flaps.

The above limitations ensure that the access bag meets the requirements of clinical applications while reducing unnecessary specifications. In a specific embodiment, it is generally defined that 250. gtoreq.B 1. gtoreq.50 mm, 300. gtoreq.H 1+ H2. gtoreq.150 mm. And gives a selection table with B1, B2, H1, H2 as parameters, and the increment of each parameter is set to an integer of ten (e.g., 20 mm).

The structure and composition of the further improved access bag 300 is substantially the same as the access bag 200 except for the width dimension of the weld. Briefly, the pouch 300 includes a mouth 201 that may be opened and closed, and a pouch 202 extending from the mouth, the mouth 201 including a surrounding tunnel 211 and a mouth weld 212. The bag body 202 includes a film bag face 203, a opposing fold 220, an inlet weld 230, a body weld 240, and a tail weld 250. The flaps 220, inlet welds 230, body welds 240 and tail welds 250 connect the film bag face 203 into a semi-enclosed bag-like whole containing the bag mouth 201. The pocket weld 212, the inlet weld 330, the body weld 340, and the tail weld 350 are all linear welds. In a specific embodiment, the pocket weld 212, the inlet weld 330, the body weld 340, and the tail weld 350 are formed by multiple welding operations using the same welding tool. While the width of the pocket weld 212 is greater than the weld width of the inlet weld 330 (body weld 340, tail weld 350). (Note that the geometric structures are numbered the same, meaning that the structures with the same numbers are substantially identical).

The steps of manufacturing an access bag 300 are generally as follows (see fig. 16):

s1, firstly cutting the film bag surface raw material to form a film bag surface 203 with a proper size, then folding one side of the film bag surface 203 and putting the folded side into welding equipment (a mould) to start welding to form a bag opening welding line 212 and a tunnel 211;

s3, putting the folded film bag surface 203 into welding equipment (a mold) to start welding to form a main body welding seam 240;

s4, putting the folded film bag surface 203 into a welding device (mold) to start welding to form an inlet welding line 230;

and S6, cutting along the welding seam to remove the excess leftover materials outside the bag body 202, thereby forming the bag 300.

The pouch 300 is primarily embodied in a different weld width than the pouch 200. The width of the bag mouth weld 212 of the access bag 300 is greater than the weld width of the inlet weld 330 (body weld 340, tail weld 350); and the widths of the mouth weld 212, the inlet weld 230, the body weld 240, and the tail weld 250 of the access bag 200 are the same. This difference is mainly due to the different ways of cutting. The object fetching bag 300 is cut along the welding line, and compared with the object fetching bag 200 which is cut along the edge of the welding line, a smooth cut edge is easier to form, local weakness caused by small irregular cuts is prevented, and the cutting efficiency is higher.

It should be readily understood by those skilled in the art that the order of the inlet weld 230, the body weld 240 and the tail weld 350 are not clearly distinguished from one another in connection with the steps of making the access pouch 200 and the access pouch 300. Before the customized bag is manufactured, the intersection point of the inlet weld 230 and the main body weld 240 is found according to the drawing (or positioning fixture) of the bag, so that the aligned intersection point at one end of the welding mold is aligned, and the other end of the welding mold extends out of the bag body 202, so that different weld joints can be welded by using the same equipment, the same welding mold and the same welding parameters, please refer to fig. 15-16. Similarly, the intersection of the main body weld 240 and the tail weld 250 is found to weld the aligned intersection of one end of the mold, and the other end extends out of the bag 202, thereby completing the welding of the tail weld 250.

An improved manufacturing process for a pouch substantially as follows:

s1, cutting the film bag face raw material to form a film bag face 203 with a proper size, folding one side of the film bag face 203, putting the folded film bag face into welding equipment (a die), and starting welding to form a bag mouth welding seam 212 and a tunnel 211;

s3, finding the intersection point of the inlet weld 230 and the main body weld 240 to weld the aligned intersection point at one end of the mould, and extending the other end of the mould to the outside of the bag body 202 to respectively complete the welding of the inlet weld 230 and the main body weld 240; finding the intersection point of the main body welding line 240 and the tail welding line 250 to weld the aligned intersection point at one end of the mold, and extending the other end of the mold out of the bag body 202 to complete the welding of the tail welding line 250;

and S4, cutting along the welding seam or along the outer edge of the welding seam, and removing the excess leftover materials outside the bag body 202 to form the bag.

As described above, the inlet weld 230 and the body weld 240 inevitably form an interface joint if the bag 202 is formed by multiple welding processes with the same parameters using the same equipment and the same mold; the same also applies to the body weld 240 and tail weld 250 which necessarily form an interface joint.

In one version, the inlet weld 230 and the body weld 240 form an interface joint 260 as shown in FIG. 17. Entry weld 230 includes an inner entry weld edge 231, a starting entry weld edge 233, and an outer entry weld edge 235; body weld 240 includes an inner body weld edge 241, a starting body weld edge 243, and an outer body weld edge 245. Where the inner inlet bead 231, the start inlet bead 233, the inner body bead 241 and the start body bead 243 intersect at an intersection point 261. The intersection point 261, the area of overlap defined by the origin entry weld edge 233 and the origin body weld edge 243, is the interface joint 260. The inlet weld 230 and the body weld 240 shown in fig. 17 form a smooth transition joint 260 with a clean connection. However, such an interface joint presents a weak link.

Please see the clinical application of the pouch in connection with the above. In clinical practice, after the tissue is excised and dropped into the access pouch, the ligature is pulled to remove the access pouch and the tissue contained therein via the puncture cannula or via a skin incision. In the process, because the inner diameter of the puncture cannula or the minimally invasive surgery incision is small, the fetching bag is subjected to large extrusion force when large tissues or organs are cut off. Typically the maximum compression force is primarily concentrated at the area where the inlet bag and the body bag meet. The intersection point 261 of the cross-over joint 260 shown in fig. 17 may be excessively heat-sealed and locally weakened due to 2 welding heats during the butt joint forming process. While the intersection 260 shown in fig. 17 is susceptible to damage during the process of squeezing the tissue contained therein from the inlet bag into the body bag as the specimen bag is tightened, the intersection 260 of weakness breaks causing susceptibility to cuts and resulting in rupture of the entire specimen bag.

In an optimized design, the inlet weld 230 and the body weld 240 form a "in-line" interface joint 260a as shown in FIG. 18. Entry weld 230 includes an inner entry weld edge 231, a starting entry weld edge 233, and an outer entry weld edge 235; body weld 240 includes an inner body weld edge 241, a starting body weld edge 243, and an outer body weld edge 245. Wherein the start body weld edge 243 intersects the entry weld 230 and does not intersect the inboard entry weld edge 231; inner body weld edge 241 intersects inlet weld 230 and does not intersect inner inlet weld edge 231; the inner body weld 241 intersects the outer inlet weld 235 to form an intersection 261 a. The intersection 261a may form a weak point. The origin inlet weld 233 does not intersect the body weld 240, and the inlet weld 230 extends into the bag body beyond the intersection point 261a to form a cantilever weld 230 a. The length X1 of cantilever weld 230a is obtained by measuring the longest distance from the origin entry weld edge 233 to the intersection point 261 a. The length of the cantilever weld 230a is of a value long enough (large) to hide the intersection point 261a "behind the body". In a specific design, X1 is greater than or equal to 1mm, so that the intersection point 261a is hidden behind. The optimized cross-over joint 260a, although the intersection point 261a may still be heated by 2 times of welding, and may form excessive heat seal, resulting in local weakness; however, due to the local enhanced protection of the cantilever weld 230a, the stress at the intersection point 261a is less and does not cause a rupture accident.

In yet another preferred embodiment, the inlet weld 230 and the body weld 240 form a "chevron" interface joint 260b as shown in FIG. 19. Entry weld 230 includes an inner entry weld edge 231, a starting entry weld edge 233, and an outer entry weld edge 235; body weld 240 includes an inner body weld edge 241, a starting body weld edge 243, and an outer body weld edge 245. Wherein inlet bead 231 intersects body bead 240 and does not intersect inner body bead 241, and start inlet bead 233 intersects body bead 240 and does not intersect inner body bead 241. The inboard inlet weld edge 231 intersects the outboard body weld edge 245 to form an intersection point 261 b. The intersection 261b may form a weak point. Beginning body weld edge 243 does not intersect inlet weld 230, and body weld 240 extends beyond intersection point 261b in the pocket direction to form cantilever weld 240 b. The length X2 of cantilever weld 240b is measured by the longest distance from the origin body weld edge 243 to the intersection point 261 b. The length of the cantilever weld 240b is of a value long enough (large) to hide the intersection point 261b "behind the body". In a specific design, X2 is greater than or equal to 1mm, so that the intersection point 261b is hidden behind. The optimized cross-over joint 260b, although the intersection point 261b may still be heated by 2 welding, may form an excessive heat seal, resulting in a local weakness; however, due to the local enhanced protection of the cantilever weld 240b, the stress at the intersection point 261b is less, and no cracking accident is caused.

Based on the optimized butt joint scheme, an improved fetching bag manufacturing method is provided, and the steps are as follows:

s3, one end of the welding mould is aligned with the top end of the cantilever to form the cantilever welding seam as a starting point, the other end extends out of the bag body 202, the welding seam which is connected with the cantilever welding seam into a whole is firstly completed, then the other welding seam which is intersected with the welding seam is completed, and finally the welding of the tail welding seam 250 is completed;

In yet another embodiment, as shown in fig. 20, a single-use bag product package 800 comprises the above-mentioned

bag

200 or 300, a sterilization bag 810 and a label 820. The bag 200(300) is sealed in the sterilization bag 810 and sterilized by ethylene oxide sterilization or irradiation sterilization to achieve a sterile level. The label 820 contains necessary regulatory information, and also contains a structural schematic diagram of the bag for taking and records the width B1 of the bag opening 201 and the width B2 of the bag opening of the main bag; the depth dimension of the inlet bag along the opposing flaps H1; the body pocket is along the depth dimension H2 of the opposing flaps. Thus, the surgeon can clearly judge whether the product bag 800 meets the clinical requirements without disassembling the sterile package.

It should be noted that the selection of an appropriate bag for surgical purposes is of great value in clinical applications. When the selected object taking bag is too large, the operation space is generally occupied when the pathological tissue is cut off, and the field of view of the operation is not sufficiently exposed; meanwhile, when the fetching bag is too large (improper) in size, when the fetching bag is pulled out through the small hole of the abdominal wall, the pathological tissue forms a spherical shape (a ball shape) in the fetching bag and is difficult to be taken out, so that the abdominal wall wound of the patient is greatly damaged. Optimally, the surgeon should select the smallest possible bag based on the size of the tissue to be excised during the procedure. However, the size of the excised tissue can often be estimated accurately at the end of the operation, and the size of the existing bag is too small, and the package does not show the structural or dimensional characteristics, so that the requirement cannot be met. The fetching bag product package 800 can be used for customizing fetching bags with various specifications in small batches, detailed structure and dimension characteristics are marked on product packages, the fetching bag product packages with various specifications are firstly applied to be fetched in the operation preparation process, then proper fetching bags are selected according to the real size of excised tissues to be disassembled, and the unused fetching bag product packages are returned.

. In conclusion, the fetching bag and the fetching bag product package well solve the problem that a doctor cannot obtain a proper fetching bag in a minimally invasive surgery.

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 without departing from the scope of the present invention by making appropriate modifications. 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. The utility model provides a medical thing bag suitable for customization production, contains the sack that can open and draw in and extends the bag body that forms from the sack, the sack contains the tunnel that encircles, its characterized in that:

1) the bag body comprises a film bag surface, a folded edge, an inlet welding line, a main body welding line and a tail welding line; the pair of folded edges, the inlet welding line, the main body welding line and the tail welding line connect the films into a semi-closed bag-shaped whole body containing a bag opening;

2) the tunnel comprises a bag opening welding seam;

3) the bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are all linear welding seams;

4) the widths of the bag opening welding seam, the inlet welding seam, the main body welding seam and the tail welding seam are the same;

5) the inlet weld comprises an inner inlet weld edge and an outer inlet weld edge, and the main body weld comprises an inner main body weld edge and an outer main body weld edge; the main body welding seam and the inlet welding seam form a cross joint, the cross joint does not intersect with the inner side main body welding edge, and the outer side main body welding edge and the inner side inlet welding edge form an intersection point;

6) and the main body welding seam continues to extend towards the bag opening from the intersection point position to form a cantilever welding seam.

2. The access bag of claim 1, wherein: the folded edge and the inlet welding line define an inlet bag and an outlet bag, the folded edge and the main body welding line define a main body bag, and the folded edge and the tail welding line define a tail bag; the size setting of the object fetching bag satisfies the following relational expression:

2*(B1-B2)≥H1≥0.5*(B1-B2)；

2.5*H1≥H2≥1.5*H1；

wherein:

b1 is the width of the bag mouth;

b2 is the width of the bag mouth of the main bag;

the depth dimension of the H1 inlet bag along the opposing flaps;

h2 body bag is along the depth dimension of the opposing flaps.

3. The access bag of claim 1, wherein: the bag mouth welding seam, the inlet welding seam, the main body welding seam and the tail welding seam can be manufactured by a same welding mould and a same processing parameter through multiple times of welding processing.

4. The extraction bag of claim 1 wherein the cantilever weld has a length of X2.

5. Bag according to claim 4, characterised in that X2 is greater than or equal to 1 mm.

6. An extraction instrument for minimally invasive surgery, characterized in that: a bag including the bag as defined in any one of claims 1-5 and further including a catheter assembly and a handle assembly extending therethrough, and a bag opening mechanism connected to said handle assembly for opening the bag, said bag and opening mechanism being disposed within said catheter assembly and axially movable relative thereto; the bag taking and the opening mechanism are pushed forwards in the catheter component by operating the handle component, extend out of the sleeve component and are opened by the opening mechanism; the opening mechanism is drawn out backwards along with the catheter component and separated from the fetching bag, and the pull wire penetrates through the catheter component.

7. A method for manufacturing a bag according to claim 3, characterised in that it comprises the following steps:

s3, putting the folded film bag surface into a welding mould to start welding to form an inlet welding line;