Puncture needle passage plugging device

Abstract

The utility model provides a puncture needle passage plugging device which comprises a plugging object, the plugging object is composed of a gelatin compression strip and a plurality of hoop structures which are evenly arranged at intervals in the length direction of the gelatin compression strip, and the hoop structures are formed in the mode that medical absorbable lines are wound around the gelatin compression strip by at least one circle and then tied tightly. The hoop structures play a role in preventing the gelatin compression strips from expanding in the radial direction, the gelatin compression strips between the adjacent hoop structures are not limited, the gelatin compression strips evenly expand in the circumferential direction after absorbing liquid, and the distance between the adjacent hoop structures can be adjusted according to actual operation requirements, so that the gelatin compression strips are convenient to use. By means of the structure, when the plugging object is placed in a puncture hole of a focus, the volume change can be larger after imbibition expansion, the plugging object is attached to the hole wall of the puncture hole more tightly, the plugging object can be anchored in the puncture hole, and meanwhile the good compression hemostasis effect can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular, it is a device for sealing puncture needle tracts. Background Technology

[0002] The main complication during lung and abdominal tumor biopsy is bleeding from the puncture site at the lesion site. Therefore, after completing the biopsy procedure, the puncture site at the lesion site needs to be sealed to reduce the risk of local bleeding, pneumothorax, and tumor spread along the needle tract.

[0003] Current techniques often use gelatin sponges to seal puncture sites within the body. The procedure involves an outer cannula along the needle tract, extending to the puncture site at the lesion. A pusher is installed inside the outer cannula, and the pusher is used to push the gelatin sponge from the cannula towards the puncture site. However, because gelatin sponges are lightweight, soft, and porous, the sponge deforms and accumulates under pressure during the pusher's movement, easily causing blockage of the outer cannula and hindering the successful delivery of the gelatin sponge to the puncture site to achieve hemostasis. Utility Model Content

[0004] The present invention aims to provide a puncture needle tract sealing device, which can solve the problem that the sealing materials in the prior art are prone to clogging the needle tract.

[0005] A puncture needle tract occlusion device includes an occluder, which is composed of a gelatin compression strip and several ring structures evenly spaced along the length of the gelatin compression strip. The ring structures are formed by wrapping the gelatin compression strip with medical absorbable thread at least one turn and then tightening it.

[0006] The ring structure of this invention prevents the gelatin compression strip from expanding radially. The gelatin compression strip between adjacent ring structures is unrestricted and expands uniformly in the circumference after absorbing liquid. Furthermore, the spacing between adjacent ring structures can be adjusted according to actual operational needs, allowing for a greater volume change after the sealing material absorbs liquid and expands when placed in the puncture hole at the lesion site. This results in a tighter fit between the sealing material and the puncture hole wall, facilitating the anchoring of the sealing material within the puncture hole while also achieving a good compression hemostasis effect.

[0007] Furthermore, the puncture needle occlusion device also includes an outer tube, the lumen of which serves as a channel for the occluding material to pass through. An axially mounted occluding material pusher is fitted inside the lumen of the outer tube; the length direction of the gelatin compression strip is aligned with the length direction of the outer tube. Under the pushing force of the occluding material pusher, the occluding material can move forward within the lumen of the outer tube. Even further, the outer tube is a medical flexible tube. When a medical flexible tube is used, the front end of the outer tube can be manually adjusted as needed and inserted into the puncture hole at the lesion site without causing significant pain to the patient. At this time, the occluding material can be pushed into the puncture hole at the lesion site using the occluding material pusher. Keeping the occluding material pusher stationary, the outer tube is pulled outwards to remove it from the puncture hole at the lesion site, and then the occluding material pusher is pulled outwards again. Compared to existing technologies where the front end of the outer sheath is made of a rigid medical tube and only extends to the puncture hole near the lesion, this invention ensures that the sealing material is delivered into the puncture hole at the lesion, thus improving the sealing effect. Preferably, a radial protrusion is provided on the outer circumferential surface of the tail end of the sealing material pusher. This radial protrusion is located axially outside the tail end of the outer sheath, and its maximum radial width is greater than the radial gap between the sealing material pusher and the outer sheath. A locking device is axially arranged between the outer sheath and the radial protrusion. This locking device is detachably mounted on the outer wall of the sealing material pusher, and its maximum radial width is greater than the radial gap between the sealing material pusher and the outer sheath. Removing the locking device provides space for the outer sheath to be pulled outwards relative to the sealing material pusher. In specific implementation, a strip-shaped groove is provided on the side wall of the locking device for the sealing material pusher to engage. During assembly, the locking device is secured to the outer wall of the blocking push rod via a strip-shaped slot.

[0008] Furthermore, the surface of the medical absorbable suture is covered with a CT contrast agent layer. Because the surface of the medical absorbable suture is covered with CT contrast agent, the location of the occluder within the body can be observed under CT scans, serving as a tracing function. Clinically, the location of the occluder can also determine which part of the lesion the sampled tissue originated from, and in cases where pathological and clinical discrepancies exist, it can provide valuable judgment as to whether the puncture was an error or puncture of necrotic components. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the puncture needle tract sealing device of this utility model in use, wherein the puncture needle tract sealing device is an axial sectional view.

[0010] Figure 2 This is a radial cross-sectional view of the sealing device of this utility model;

[0011] Figure 3 This is a three-dimensional structural diagram of the locking device of this utility model. Detailed Implementation

[0012] The implementation method of the puncture needle tract sealing device of this utility model will now be described in detail with reference to the accompanying drawings:

[0013] Combination Figure 1 and Figure 2 A puncture needle tract occlusion device includes an occluder 10, wherein the occluder 10 is composed of a gelatin compression strip 11 and several ring structures 12 evenly spaced along the length of the gelatin compression strip 11. The ring structures 12 are formed by wrapping the gelatin compression strip 11 with medical absorbable thread at least one turn and then tightening it.

[0014] This invention utilizes a compressed gelatin strip 11, which is then combined with a ring structure 12 formed by winding the gelatin strip 11 with medical absorbable thread to radially limit the gelatin strip 11, thereby forming a dense and relatively hard sealing material 10. When using this sealing material 10 to seal the puncture hole 100, the sealing material 10 is not prone to radial expansion and deformation under the pushing force of the push rod, and can be quickly pushed into the puncture hole 100 at the lesion. Inside the puncture hole 100, the sealing material 10 absorbs blood and body fluids. Since the gelatin compressed strip 11 between adjacent ring structures 12 is not restricted by the ring structure 12, it expands uniformly in the circumference and enlarges, covering the hole wall of the puncture hole 100 and achieving compression hemostasis. Furthermore, the spacing between adjacent ring structures 12 can be adjusted according to actual operational needs, allowing for greater volume change after the inserted plug absorbs liquid and expands. This results in a tighter fit between the plug 10 and the wall of the puncture hole, facilitating the anchoring of the plug 10 within the puncture hole while also achieving good compression hemostasis.

[0015] The number of turns of the medical absorbable thread wrapped around the gelatin compression strip 11 can be arbitrarily selected as needed, as long as it can be tied tightly after winding to form a ring-shaped clamping structure 12 that can tighten the gelatin compression strip 11.

[0016] Furthermore, such as Figure 2As shown, the puncture needle tract occlusion device also includes an outer tube 20. The lumen of the outer tube 20 serves as an occlusion channel for the occlusion material 10 to pass through. An occlusion material pusher 30 is axially fitted inside the lumen of the outer tube 20. The length direction of the gelatin compression strip 11 is consistent with the length direction of the outer tube 20. Under the pushing force of the occlusion material pusher 30, the occlusion material 10 can move forward within the lumen of the outer tube 20. Furthermore, the outer tube 20 is a medical flexible tube. When the outer tube 20 is made of a medical flexible tube, it can be made of PVC flexible tube, silicone flexible tube, polyurethane flexible tube, etc. When the outer tube 20 is made of medical tubing, the tip of the outer tube 20 can be manually adjusted as needed to insert into the puncture hole 100 at the lesion site without causing significant pain to the patient. At this time, the sealing material 10 can be pushed into the puncture hole 100 at the lesion site using the sealing material pusher 30. While keeping the sealing material pusher 30 stationary, the outer tube 20 is pulled outwards to remove it from the puncture hole 100 at the lesion site, and then the sealing material pusher 30 is pulled outwards again. Compared to the prior art where the tip of the outer tube 20 is made of medical rigid tubing and only extends to the puncture hole 100 near the lesion site, this invention ensures that the sealing material 10 is delivered into the puncture hole 100 at the lesion site, thus improving the sealing effect. Of course, the outer tube 20 of the puncture needle tract sealing device of this invention can also be made of medical rigid tubing.

[0017] Furthermore, combining Figure 1 and Figure 3 A radial protrusion 31 is provided on the outer circumferential surface of the tail end of the plugging push rod 30. The radial protrusion 31 is located axially outside the tail end of the outer sleeve 20, and the maximum radial width of the radial protrusion 31 is greater than the radial gap between the plugging push rod 30 and the outer sleeve 20. This allows the radial protrusion 31 to be locked on the axial outside of the tail end of the outer sleeve 20 when the plugging push rod 30 is pushed inward, thus axially limiting the plugging push rod 30. A locking device 40 is provided axially between the outer sleeve 20 and the radial protrusion 31. The locking device 40 is detachably installed on the outer wall of the plugging push rod 30, and the maximum radial width of the locking device 40 is greater than the radial gap between the plugging push rod 30 and the outer sleeve 20. When the locking device 40 is installed on the outer wall of the sealing material push rod 30, the locking device 40 can be locked on the axially outer side of the tail end of the outer sleeve 20, preventing the sealing material push rod 30 from moving forward. Removing the locking device 40 provides space for the outer sleeve 20 to be pulled out a certain distance before the sealing material push rod 30. In specific implementation, combined with... Figure 1 and Figure 3The locking device 40 has a strip-shaped groove 41 on its side wall for the insertion of the sealing material push rod 30. During assembly, the locking device 40 is secured to the outer wall of the sealing material push rod via the strip-shaped groove 41. Of course, the radial protrusion 31 or the locking device 40 may not be provided on the outer tube of the puncture needle tract sealing device of this utility model.

[0018] The absorbable medical sutures mentioned can be surgical sutures, etc.

[0019] Furthermore, the surface of the medical absorbable suture is covered with a CT contrast agent layer. The dried medical absorbable suture is immersed in a CT contrast agent solution (e.g., iodine solution), then removed. After the CT contrast agent on the surface of the medical absorbable suture has air-dried and solidified, the gelatin compression strip 11 is then wrapped around it to prepare the sealing material. Because the surface of the medical absorbable suture is covered with a CT contrast agent, the location of the sealing material 10 in the body can be observed under CT scans, serving a tracing function. In addition, clinically, the location of the sealing material 10 can be used to determine which part of the lesion the punctured tissue originated from. In cases where pathological and clinical discrepancies exist, it can be used to determine whether it is a puncture error or puncture of necrotic components, providing valuable insights. Of course, the surface of the medical absorbable suture in the puncture needle tract sealing device of this invention may not be covered with the CT contrast agent layer.

[0020] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for sealing a puncture needle tract, comprising a sealing material, characterized in that: The sealing material consists of a gelatin compression strip and several ring structures evenly spaced along the length of the gelatin compression strip. The ring structures are formed by wrapping the gelatin compression strip with medical absorbable thread at least once and then tightening it.

2. The puncture needle tract sealing device according to claim 1, characterized in that: The puncture needle tract occlusion device also includes an outer tube, the lumen of which serves as a channel for the occluder to pass through, and an occluder push rod is fitted axially inside the lumen of the outer tube; the length direction of the gelatin compression strip is consistent with the length direction of the outer tube.

3. The puncture needle tract sealing device according to claim 2, characterized in that: The outer tube is a medical-grade flexible tube.

4. The puncture needle tract sealing device according to claim 2, characterized in that: A radial protrusion is provided on the outer circumferential surface of the tail end of the plugging push rod. The radial protrusion is located axially outside the tail end of the outer sleeve, and the maximum radial width of the radial protrusion is greater than the radial gap between the plugging push rod and the outer sleeve. A locking device is axially arranged between the outer sleeve and the radial protrusion. The locking device is detachably installed on the outer wall of the plugging push rod, and the maximum radial width of the locking device is greater than the radial gap between the plugging push rod and the outer sleeve.

5. The puncture needle tract sealing device according to claim 4, characterized in that: A strip-shaped groove is provided on the side wall of the locking device for the blocking push rod to be inserted.

6. The puncture needle tract sealing device according to claim 1, characterized in that: The surface of the medical absorbable thread is covered with a CT contrast agent layer.

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