Puncture assembly and hemostasis device for laparoscopic surgery

Abstract

The utility model provides a puncture assembly and a hemostasis device for laparoscopic surgery, the puncture assembly comprises a puncture outfit and an external cannula, and the puncture outfit is provided with a channel extending along the axial direction of the puncture outfit; when the puncture assembly is in an installation state, the external sleeve is inserted into the channel and is in friction fit with the channel, so that the external sleeve is fixed in the channel, and a passage in the external sleeve is used for allowing surgical instruments to enter and exit from the abdominal cavity from the outside. The technical problem that blood vessels are pulled when hemostatic forceps and a puncture outfit are used in cooperation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a puncture assembly and a hemostatic device for laparoscopic surgery. Background Art

[0002] During a surgical operation, in order to fully expose the surgical field of view, it is necessary to ligate the blood vessels around the target tissue to prevent bleeding. Hemostasis technology has become one of the cores of the basic operation techniques in surgery. Surgical operations in any part of the human body almost invariably involve bleeding and hemostasis, and generally use hemostatic forceps with ligation clips to close for hemostasis.

[0003] As Figure 1 shown, the hemostatic forceps currently used in clinical practice generally include a handle 1 and a shaft assembly 2 arranged in sequence from near to far. The upper end of the handle 1 forms an adapter 11, and the proximal end of the shaft assembly 2 is connected to the distal end of the adapter 11. The shaft assembly 2 includes a sleeve 21 extending in the near-far direction and a jaw 22 located at the distal end of the sleeve 21. The adapter 11 can drive the sleeve 21 to move distally to squeeze the jaw 22 so that the ligation clip in the jaw 22 is buckled.

[0004] When the hemostatic forceps are used in laparoscopic surgery, the sleeve 21 needs to be inserted into a trocar 3 so that the distal end (including the jaw 22) of the shaft assembly 2 is located inside the human body to perform a hemostasis operation on the blood vessel. The trocar 3 is fixed on the patient's body. The sleeve 21 is inserted into the trocar 3, and there is a large friction fit structure between the sleeve 21 and the trocar 3. During the firing process of the hemostatic forceps (i.e., during the process of the adapter 11 driving the sleeve 21 to move distally), due to the large friction between the sleeve 21 and the trocar 3, the main body of the hemostatic forceps (including the jaw) will retreat, causing the sleeve 21 to move relative to the main body of the hemostatic forceps. In this way, when the ligation clip buckles the blood vessel, it will cause traction on the blood vessel and easily tear the blood vessel. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the technical problem of causing traction on the blood vessel when the hemostatic forceps and the trocar are used in combination, the utility model solves it at least to a certain extent. For this reason, the utility model provides a puncture assembly and a hemostatic device for laparoscopic surgery.

[0007] (2) Technical Solutions

[0008] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0009] In a first aspect, the present utility model provides a puncture assembly, comprising a puncture device and an external cannula. The puncture device has a channel extending along its axial direction. In the installed state of the puncture assembly, the external cannula is inserted into the channel, and there is a friction fit between the external cannula and the channel, so that the external cannula is fixed in the channel. The passage in the external cannula is used for surgical instruments to enter and exit the abdominal cavity from outside the body, and the external cannula completely covers the channel in the length direction.

[0010] Optionally, the puncture device includes a support and a catheter connected in sequence. The catheter is used to be inserted into the abdominal cavity from outside the body, and the support is used to provide support for the catheter outside the body. The external cannula has opposite first and second ends. In the installed state of the puncture assembly, the first end of the external cannula extends distally beyond the support, and the second end of the external cannula extends proximally beyond the support.

[0011] Optionally, the first end of the external cannula extends distally beyond the cannula.

[0012] Optionally, a stop is provided on the outer wall of the second end of the external cannula. In the installed state of the puncture assembly, the stop abuts against the proximal end of the support.

[0013] Optionally, at the end of the second end of the external cannula, a flanging structure that turns outward to the outside of the external cannula is provided along the circumferential direction of the external cannula.

[0014] Optionally, on the inner wall of the channel, a plurality of elastically deformable membrane flaps are provided along the circumferential direction of the channel. The plurality of membrane flaps form a through hole around the center of the channel. The radial dimension of the through hole formed by the plurality of membrane flaps (34) in the free state is smaller than the radial dimension of the external cannula. In the installed state of the puncture assembly, the external cannula is arranged through the through hole, and each membrane flap undergoes elastic deformation and closely adheres to the outer wall of the external cannula.

[0015] Optionally, the membrane flap is trapezoidal. The membrane flap has a first end connected to the inner wall of the channel and a second end far from the inner wall of the channel. The first end of the membrane flap is the wide part of the trapezoid, and the second end of the membrane flap is the narrow part of the trapezoid.

[0016] Optionally, the plurality of membrane flaps are evenly distributed along the circumferential direction of the channel.

[0017] In a second aspect, the present utility model provides a hemostatic device for laparoscopic surgery, comprising the puncture assembly as described above and a hemostatic forceps. The hemostatic forceps has a cannula for clamping the jaws. In the installed state of the hemostatic device, the cannula of the hemostatic forceps is inserted into the puncture device through the internal passage of the external cannula, and there is a clearance fit between the external cannula and the cannula of the hemostatic forceps.

[0018] Optionally, the inner diameter of the external cannula is 0.4 - 1 mm larger than the outer diameter of the cannula of the hemostatic forceps.

[0019] (III) Beneficial effects

[0020] The beneficial effects of the present utility model are as follows:

[0021] When the puncture assembly provided by the present utility model is used in cooperation with a hemostatic forceps during a laparoscopic operation, the distal end of the hemostatic forceps shaft assembly is inserted into the puncture device through the internal passage of the external cannula. The cannula on the hemostatic forceps for clamping the jaws does not contact the inner wall of the puncture device channel, avoiding a large frictional force generated by the cooperation between the hemostatic forceps cannula and the puncture device channel. Thus, during the firing process of the hemostatic forceps, the adapter drives the cannula to move distally to squeeze the opposite sides of the jaws to buckle the ligating clip, and the firing process will not cause the shaft assembly to retreat, thereby avoiding the pulling of blood vessels when the ligating clip buckles the blood vessels and tearing the blood vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present utility model is described with the aid of the following drawings:

[0023] Figure 1 FIG. 1 is a schematic structural view of a hemostatic forceps according to the background art of the present utility model;

[0024] Figure 2 FIG. 2 is a schematic structural view of the puncture assembly according to Embodiment 1 of the present utility model in an uninstalled state, wherein the puncture device and the external cannula are separately arranged;

[0025] Figure 3 FIG. 3 is a schematic structural view of the puncture assembly according to Embodiment 1 of the present utility model in an installed state, wherein the external cannula is inserted into the channel of the puncture device;

[0026] Figure 4 FIG. 4 is a schematic structural view of a plurality of membrane flaps arranged on a support according to Embodiment 2 of the present utility model;

[0027] Figure 5 FIG. 5 is a schematic structural view of the hemostatic device according to Embodiment 3 of the present utility model in an uninstalled state, wherein the puncture device, the external cannula and the hemostatic forceps are separately arranged;

[0028] Figure 6 FIG. 6 is a schematic structural view of the hemostatic device according to Embodiment 3 of the present utility model in an installed state, wherein the external cannula is inserted into the channel of the puncture device, and the cannula of the hemostatic forceps is inserted into the puncture device through the internal passage of the external cannula.

[0029]

DESCRIPTION OF THE REFERENCE NUMERALS

[0030] 1: Handle;

[0031] 11: Adapter;

[0032] 2: Shaft assembly;

[0033] 21: Cannula; 22: Jaws;

[0034] 3: Puncture device;

[0035] 31: Catheter; 32: Support; 33: Inflatable structure; 34: Membrane flap; 35: Through hole;

[0036] 4: External cannula;

[0037] 41: Stop; 42: Flanging structure. Detailed implementation mode

[0038] It should be noted that the "near" mentioned in this article refers to the side close to the operator, and the "far" refers to the side close to the patient. The orientation nouns such as "upper", "lower", "front", "rear", "left", and "right" mentioned in this article are based on Figure 1 and Figure 2 the orientation of, and the direction from front to back is also the direction from far to near.

[0039] Embodiment 1

[0040] As Figure 2 and Figure 3 shown, this embodiment provides a puncture assembly, which includes a puncture device 3 and an external cannula 4.

[0041] Among them, the puncture device 3 has a channel extending along its axis. After the puncture device 3 punctures the abdominal cavity, the abdominal cavity interior and the abdominal cavity exterior are communicated through the channel. In the installed state of the puncture assembly, the external cannula 4 is inserted into the channel, and the external cannula 4 is in frictional fit with the channel, so that the external cannula 4 is fixed in the channel. The passage in the external cannula 4 is used for surgical instruments to enter and exit the abdominal cavity from outside the body, and the external cannula 4 completely covers the channel in the length direction.

[0042] The puncture assembly arranged in this way is used for laparoscopic surgery. When used in cooperation with the hemostatic forceps described in the background technology, the distal end of the hemostatic forceps shaft assembly 2 is inserted into the puncture device 3 through the internal passage of the external cannula 4, and the sleeve 21 of the hemostatic forceps does not contact the inner wall of the channel of the puncture device 3, avoiding a large frictional force generated by the cooperation between the sleeve 21 of the hemostatic forceps and the channel of the puncture device 3. Thus, during the firing process of the hemostatic forceps, the adapter 11 drives the sleeve 21 to move distally to squeeze the opposite sides of the forceps jaws 22 to buckle the ligating clip, and the firing process will not cause the shaft assembly 2 to retreat, thereby avoiding the ligating clip from pulling the blood vessel when buckling the blood vessel and breaking the blood vessel.

[0043] Specifically, the puncture device 3 includes a catheter 31 and a support 32 connected to one end of the catheter 31. The catheter 31 has a first passage, and the support 32 has a second passage. The first passage and the second passage are communicated to form a passage for surgical instruments to enter and exit. In the installed state of the puncture assembly, the support 32 is located outside the body, and the catheter 31 is inserted into the abdominal cavity from outside the body.

[0044] Preferably, the external cannula 4 has opposite first and second ends; in the installed state of the puncture assembly, the first end of the external cannula 4 extends distally from the support 32, and the second end of the external cannula 4 extends proximally from the support 32. Further preferably, in the present embodiment, the first end of the external cannula 4 extends distally from the catheter 31.

[0045] Preferably, a stop member 41 is provided on the outer wall of the second end of the external cannula 4; in the installed state of the puncture assembly, the stop member 41 abuts against the proximal end of the support 32. In this way, the insertion position of the external cannula 4 in the channel can be positioned.

[0046] Preferably, at the end of the second end of the external cannula 4, a flanging structure 42 that turns outwardly to the outside of the external cannula 4 is provided circumferentially along the external cannula 4. By providing the flanging structure 42, it is convenient to insert and remove the external cannula 4 in the channel.

[0047] Specifically, an inflation structure 33 communicating with the channel and a valve for controlling the opening and closing of the inflation structure 33 are further provided on the support 32. Through the inflation structure 33 and the valve, gas is blown into the channel, and then the abdominal cavity is inflated.

[0048] Embodiment 2

[0049] The main difference between this embodiment and Embodiment 1 is:

[0050] Preferably, as Figure 4 shown, on the inner wall of the channel, a plurality of elastically deformable membrane flaps 34 are provided circumferentially along the channel. The plurality of membrane flaps 34 form a through hole 35 around the center of the channel. The radial dimension of the through hole 35 formed by the plurality of membrane flaps 34 in the free state is smaller than the radial dimension of the external cannula 4; in the installed state of the puncture assembly, the external cannula 4 is disposed through the through hole 35, and each membrane flap 34 undergoes elastic deformation and closely adheres to the outer wall of the external cannula 4. In this way, by providing the membrane flap 34 structure, while allowing the external cannula 4 to be inserted and removed in the channel, a large frictional fit can be provided between the external cannula 4 and the channel, so that the external cannula 4 is fixed in the channel.

[0051] Specifically, in the present embodiment, the plurality of membrane flaps 34 are provided on the inner wall of the second passage of the support 32.

[0052] Specifically, in the present embodiment, each membrane flap 34 has a first end close to the inner wall of the channel and a second end far from the inner wall of the channel; in the installed state of the puncture assembly, the external cannula 4 is disposed through the through hole 35, and the second end of each membrane flap 34 undergoes elastic deformation and closely adheres to the outer wall of the external cannula 4.

[0053] Further preferably, the membrane flap 34 is trapezoidal. The membrane flap 34 has a first end connected to the inner wall of the channel and a second end away from the inner wall of the channel. The first end of the membrane flap 34 is the wide part of the trapezoid, and the second end of the membrane flap 34 is the narrow part of the trapezoid.

[0054] Further preferably, a plurality of membrane flaps 34 are evenly distributed along the circumferential direction of the channel. In this way, after the external cannula 4 is inserted into the channel, the elastic forces exerted by the plurality of membrane flaps 34 on the external cannula 4 can stably maintain the external cannula 4 at the central position of the channel. Specifically, in this embodiment, the number of membrane flaps 34 is 6.

[0055] Further preferably, adjacent membrane flaps 34 are connected by an elastic membrane, and the plurality of membrane flaps 34 and the plurality of elastic membranes together form a through hole 35 around the center of the channel. In this way, when the external cannula 4 is inserted into the puncture assembly and penetrates through the through hole 35, the membrane flaps 34 and the elastic membrane can form a seal between the external cannula 4 and the channel, which is beneficial to maintaining the pressure in the abdominal cavity.

[0056] The rest is the same as that in Embodiment 1 and will not be elaborated here.

[0057] Embodiment 3

[0058] Based on Embodiment 1 or Embodiment 2, this embodiment provides a hemostatic device for laparoscopic surgery.

[0059] As Figure 5 and Figure 6 shown, the hemostatic device includes a puncture assembly and a hemostatic forceps; in the installed state of the hemostatic device, the cannula 21 of the hemostatic forceps is inserted into the puncture device 3 through the internal passage of the external cannula 4, and the external cannula 4 is in clearance fit with the cannula 21 of the hemostatic forceps.

[0060] In this way, the cannula 21 of the hemostatic forceps does not contact the inner wall of the channel of the puncture device 3, avoiding a large frictional force generated by the cooperation between the cannula 21 of the hemostatic forceps and the channel of the puncture device 3. Thus, during the firing process of the hemostatic forceps, the adapter 11 drives the cannula 21 to move distally to squeeze the opposite sides of the forceps jaws 22 to buckle the ligating clip, and the firing process will not cause the shaft assembly 2 to retreat, thereby avoiding the ligating clip from pulling the blood vessel when buckling the blood vessel and breaking the blood vessel.

[0061] Preferably, the inner diameter of the external cannula 4 is 0.4 - 1 mm larger than the outer diameter of the cannula 21 of the hemostatic forceps.

[0062] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0063] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] In the present utility model, unless otherwise clearly defined and limited, when the first feature is "on" or "under" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0065] In the description of this specification, the descriptions of terms such as "an embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A puncture assembly, characterized in that: It comprises a puncture device (3) and an external sleeve (4), wherein the puncture device (3) has a channel extending along its axial direction; When the puncture assembly is in an installed state, the external sleeve (4) is inserted into the channel, and the external sleeve (4) and the channel are frictionally matched so that the external sleeve (4) is fixed in the channel. The passage in the external sleeve (4) is used for surgical instruments to enter and exit the abdominal cavity from outside the body, and the external sleeve (4) completely covers the channel in the length direction.

2. The puncture assembly according to claim 1, characterized in that: The puncture device (3) comprises a support (32) and a catheter (31) which are connected in sequence, the catheter (31) is used to be inserted into the abdominal cavity from outside the body, and the support (32) is used to provide support for the catheter (31) outside the body; the external sleeve (4) has a first end and a second end which are opposite to each other; When the puncture assembly is in the installed state, the first end of the external sleeve (4) extends out of the support (32) toward the distal end, and the second end of the external sleeve (4) extends out of the support (32) toward the proximal end.

3. The puncture assembly according to claim 2, characterized in that: The first end of the external sleeve (4) extends out of the sleeve (21) toward the distal end.

4. The puncture assembly according to claim 2, characterized in that: A stopper (41) is provided on the outer wall of the second end of the external sleeve (4); When the puncture assembly is in the installed state, the stopper (41) abuts against the proximal end of the support (32).

5. The puncture assembly according to claim 2, characterized in that: At the second end portion of the external sleeve (4), a flange structure (42) is provided along the circumference of the external sleeve (4) and is turned toward the outside of the external sleeve (4).

6. The puncture assembly according to claim 1, characterized in that: A plurality of elastically deformable membrane flaps (34) are arranged on the inner wall of the channel along the circumference of the channel, and the plurality of membrane flaps (34) surround a through hole (35) at the center of the channel. The radial dimension of the through hole (35) formed by the plurality of membrane flaps (34) in a free state is smaller than the radial dimension of the external sleeve (4). When the puncture assembly is in an installed state, the external sleeve (4) passes through the through hole (35), and each membrane flap (34) is elastically deformed and closely attached to the outer wall of the external sleeve (4).

7. The puncture assembly according to claim 6, characterized in that: The membrane flap (34) is trapezoidal, having a first end connected to the inner wall of the channel and a second end away from the inner wall of the channel, the first end of the membrane flap (34) is the wide part of the trapezoid, and the second end of the membrane flap (34) is the narrow part of the trapezoid.

8. The puncture assembly according to claim 6, characterized in that: A plurality of membrane petals (34) are evenly distributed along the circumference of the channel.

9. A hemostatic device for laparoscopic surgery, characterized in that: The invention comprises a puncture assembly and a hemostatic forceps as claimed in any one of claims 1 to 8, wherein the hemostatic forceps has a sleeve (21) for clamping the jaws (22); When the hemostatic device is in an installed state, the sleeve (21) of the hemostatic forceps is inserted into the puncture device (3) through the internal passage of the external sleeve (4), and the external sleeve (4) and the sleeve (21) of the hemostatic forceps are in clearance fit.

10. The hemostatic device for laparoscopic surgery according to claim 9, characterized in that: The inner diameter of the external sleeve (4) is 0.4 to 1 mm larger than the outer diameter of the hemostatic forceps sleeve (21).

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