Puncture trocar for prostatic cancer

Abstract

The utility model relates to the technical field of medical supplies, and particularly discloses a puncture trocar for prostatic cancer, which comprises a puncture needle and an indwelling needle tube. The puncture needle is provided with a needle passage; the indwelling needle tube is arranged outside the puncture needle in a sleeving mode, the puncture needle and the indwelling needle tube form a concentric sleeve structure, and the end of the puncture needle is located outside the indwelling needle tube; the puncture end of the puncture needle is provided with a shape memory deformation part; the shape memory deformation part is configured to be tubular in a low-temperature phase, so that prostate cancer tissues can enter the needle passage; the shape memory deformation part is configured in a manner that a high-temperature phase is arranged in a flat shape, so that the needle passage is narrowed; according to the puncture trocar for the prostate cancer, in the process of taking out prostate cancer tissue, the cancer tissue is not prone to being separated from a needle passage, and the situation that cancer tissue cells are planted in the prostate tissue which does not cancerate can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical supplies, in particular to a puncture trocar for prostate cancer. Background Art

[0002] Prostate biopsy is done to determine whether a patient has prostate cancer. Prostate biopsy is a relatively safe procedure, with the main risks being injury, bleeding, and infection. Prostate biopsy can damage organs around the prostate, such as the rectum, bladder, and urethra. Ultrasound-guided biopsy can greatly reduce the probability of injury.

[0003] However, during prostate puncture biopsy, after the needle is inserted and punctured, the prostate cancer tissue enters the puncture needle and is removed with the puncture needle. In the process of removing the prostate cancer tissue, there is a risk that the cancer tissue will fall off from the puncture needle, resulting in the risk of cancer tissue cells being implanted in non-cancerous prostate tissue. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a puncture sheath needle for prostate cancer which can reduce the cancer tissue from falling off from the puncture needle and can effectively reduce the situation that cancer tissue cells are implanted in non-cancerous prostate tissue.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A puncture trocar for prostate cancer, comprising a puncture needle and an indwelling needle tube. The puncture needle has a needle channel; the indwelling needle tube is sleeved outside the puncture needle, the puncture needle is configured to form a concentric sleeve structure with the indwelling needle tube, and the end of the puncture needle is located outside the indwelling needle tube, and the indwelling needle tube is detachably connected to the puncture needle.

[0007] The insertion end of the puncture needle has a shape memory deformation portion; the shape memory deformation portion is configured to be tubular in the low temperature phase so that prostate cancer tissue can enter the needle channel; the shape memory deformation portion is configured to be flat in the high temperature phase so that the needle channel is narrowed.

[0008] Wherein, the caliber of the shape memory alloy needle when it is in the low temperature phase is much larger than the caliber of the shape memory alloy needle when it is in the high temperature phase.

[0009] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, the indwelling needle tube comprises: a first needle seat and a first needle tube; the first needle tube is configured to be fixedly connected to the first needle seat.

[0010] The first needle seat is provided with a needle holding handle, and the needle holding handle and the first needle seat are integrally provided.

[0011] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, the puncture needle comprises: a second needle seat and a second needle tube; the second needle tube is configured to be fixedly connected to the second needle seat; an adsorbent is provided on the needle holding handle, and an adsorbed part matched with the adsorbent is provided on the second needle seat; the adsorbent and the adsorbed part are arranged opposite to each other, and the adsorbent is used to be adsorbed on the adsorbed part.

[0012] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, the second needle tube comprises: a tubular needle rod and a shape memory alloy needle head.

[0013] The shape memory alloy needle is configured to be fixedly connected to the end of the tubular needle rod.

[0014] The tubular needle rod coincides with the central axis of the shape memory alloy needle head.

[0015] In the puncture trocar for prostate cancer provided by at least one embodiment of the present disclosure, the non-tip end of the shape memory alloy needle has a tubular insertion portion, and the outer diameter of the tubular insertion portion is smaller than the outer diameter of the shape memory alloy needle.

[0016] The tubular needle rod is provided with an insertion groove matched with the tubular insertion part, the tubular insertion part is inserted into the insertion groove, and the inner tube wall of the tubular insertion part is flush with the inner tube wall of the tubular needle rod.

[0017] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, an embedding body is provided on the outer tube wall of the tubular insertion portion, an embedding groove is provided on the tubular needle rod, and the embedding groove is connected to the insertion groove.

[0018] When the tubular insertion portion is inserted into the insertion groove, the embedding body is embedded in the embedding groove.

[0019] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, the head end of the tubular needle rod is provided with a flange, and the second needle seat is provided with a perforation and a positioning hole.

[0020] The end of the tubular needle rod passes through the through hole, and the flange is embedded in the positioning hole.

[0021] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, a positioning groove is provided on the inner tube wall of the tubular insertion portion.

[0022] A retaining ring is fixedly arranged in the positioning groove, the inner ring surface of the retaining ring is flush with the inner tube wall of the tubular insertion part, and the retaining ring is used to maintain the shape of the tubular insertion part to prevent the tubular insertion part from being deformed.

[0023] In the puncture trocar for prostate cancer provided in at least one embodiment of the present disclosure, more than one embedding body is provided, and the embedding bodies are distributed around the retaining ring in a circular array.

[0024] The beneficial effect of the utility model is as follows: by providing a shape memory deformation portion at the insertion end of the puncture needle, after the puncture needle is inserted into the target position, the shape memory deformation portion can be gradually changed from a tubular shape to a flat shape under the influence of temperature, so that the needle channel of the shape memory deformation portion is locally narrowed, and then in the process of removing prostate cancer tissue, the cancer tissue is not easy to escape from the needle channel, which can effectively reduce the situation where cancer tissue cells are implanted in non-cancerous prostate tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 The utility model is a cross-sectional view of a puncture trocar for prostate cancer.

[0027] Figure 2 The utility model is a partial cross-sectional view of a puncture trocar for prostate cancer.

[0028] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0029] Figure 4 for Figure 1 Enlarged view of point B in the middle.

[0030] Figure 5 This is a schematic diagram of the structure of the shape memory alloy needle in the low temperature phase.

[0031] Figure 6 This is a schematic diagram of the structure of the shape memory alloy needle when it is in the high temperature phase.

[0032] In the figure:

[0033] 10. puncture needle; 11. second needle seat; 12. second needle tube; 121. tubular needle rod; 122. shape memory alloy needle; 123. tubular insertion part; 124. embedded body; 125. retaining ring; 111. adsorbed part;

[0034] 20. Indwelling needle tube; 21. First needle seat; 22. First needle tube; 211. Needle handle; 212. Adsorbed part. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments.

[0036] Example

[0037] like Figure 1 , 5 As shown in Figures 6 and 7, this embodiment provides a puncture trocar for prostate cancer, comprising a puncture needle 10 and an indwelling needle tube 20. The puncture needle 10 has a needle channel; the indwelling needle tube 20 is sleeved outside the puncture needle 10, and the puncture needle 10 is configured to form a concentric sleeve structure with the indwelling needle tube 20, and the end of the puncture needle 10 is located outside the indwelling needle tube 20, and the indwelling needle tube 20 is detachably connected to the puncture needle 10.

[0038] The insertion end of the puncture needle 10 has a shape memory deformation portion, which has a high temperature phase and a low temperature phase; the low temperature phase of the shape memory deformation portion is arranged in a tubular shape so that prostate cancer tissue can enter the needle channel; the high temperature phase of the shape memory deformation portion is arranged in a flat shape so that the needle channel is narrowed.

[0039] The caliber of the shape memory alloy needle when it is in the low temperature phase is much larger than the caliber of the shape memory alloy needle when it is in the high temperature phase.

[0040] During use, by providing a shape memory deformation portion at the insertion end of the puncture needle, after the puncture needle penetrates into the target position in the body, the shape memory deformation portion is affected by the body temperature and can gradually change from a tubular shape to a flat shape, so that the needle path of the shape memory deformation portion is narrowed, and then the cancer tissue is not easy to escape from the needle path during the process of removing the prostate cancer tissue.

[0041] like Figure 1 , 2 As shown in FIG. 4 , in this embodiment, the indwelling needle tube 20 includes a first needle seat 21 and a first needle tube 22 ; the first needle tube 22 is configured to be fixedly connected to the first needle seat 21 .

[0042] Furthermore, a needle holding handle 211 is provided on the first needle seat 21, and the needle holding handle 211 is integrally provided with the first needle seat 21. The needle holding handle 211 is provided to facilitate the operation of medical staff and improve convenience.

[0043] like Figure 1 , 2As shown in Figures 3 and 4, in this embodiment, the puncture needle 10 includes a second needle seat 11 and a second needle tube 12; the second needle tube 12 is configured to be fixedly connected to the second needle seat 11; an adsorbent 212 is provided on the needle handle 211, and an adsorbed part 111 matched with the adsorbent 212 is provided on the second needle seat 11; the adsorbent 212 and the adsorbed part 111 are arranged opposite to each other, and the adsorbent 212 is used to be adsorbed on the adsorbed part 111. By providing the adsorbent 212 and the adsorbed part 111, the stability of the puncture needle and the indwelling needle tube can be improved.

[0044] Exemplarily, the adsorbing member 212 is a magnet, and the adsorbed member 111 is a metal sheet that can be adsorbed by the magnet.

[0045] like Figure 3 , 5 As shown in FIG. 6 , in this embodiment, the second needle tube 12 includes a tubular needle rod 121 and a shape memory alloy needle head 122; the shape memory alloy needle head 122 is configured to be fixedly connected to the end of the tubular needle rod 121. The central axis of the tubular needle rod 121 and the shape memory alloy needle head 122 coincide with each other.

[0046] Furthermore, the shape memory alloy needle 122 has a high temperature phase and a low temperature phase. The low temperature phase of the shape memory alloy needle 122 is arranged in a tubular shape; and the high temperature phase of the shape memory alloy needle 122 is arranged in a flat shape.

[0047] Exemplarily, the shape memory alloy needle 122 is made of sanitary-grade shape memory nickel-titanium alloy, and the phase change temperature of the shape memory alloy needle 122 is 37° C.-38° C.

[0048] Furthermore, the non-tip end of the shape memory alloy needle 122 has a tubular insertion portion 123, and the outer diameter of the tubular insertion portion 123 is smaller than the outer diameter of the shape memory alloy needle 122. The tubular needle rod 121 is provided with an insertion groove (not shown) matched with the tubular insertion portion 123, the tubular insertion portion 123 is inserted into the insertion groove, and the inner tube wall of the tubular insertion portion 123 is flush with the inner tube wall of the tubular needle rod 121. The outer tube wall of the tubular insertion portion 123 is fixedly provided with an embedding body 124, and the tubular needle rod 121 is provided with an embedding groove (not shown), which is connected to the insertion groove. When the tubular insertion portion 123 is inserted into the insertion groove, the embedding body 124 is embedded in the embedding groove.

[0049] The connection between the tubular needle rod 121 and the shape memory alloy needle head 122 is stable and can effectively prevent the shape memory alloy needle head 122 from falling off.

[0050] like Figure 2 As shown, further, the first end of the tubular needle rod 121 is provided with a flange, and the second needle seat 11 is provided with a through hole (not shown) and a positioning hole (not shown). The end of the tubular needle rod 121 passes through the through hole, and the flange is embedded in the positioning hole.

[0051] In this embodiment, a positioning groove (not shown) is provided on the inner wall of the tubular inserting portion 123. A retaining ring 125 is fixedly provided in the positioning groove, and the inner ring surface of the retaining ring 125 is flush with the inner wall of the tubular inserting portion 123. The retaining ring 125 is used to maintain the shape of the tubular inserting portion 123 to prevent the tubular inserting portion 123 from being deformed.

[0052] Exemplarily, the retaining ring 125 is made of medical grade stainless steel.

[0053] Furthermore, more than one embedding body 124 is provided, and the embedding bodies 124 are distributed around the retaining ring 125 in a ring array.

[0054] Although the embodiments of the present application have been shown and described above, the scope of protection of the present invention is not limited thereto, and any changes or substitutions that are not conceivable through creative work should be included in the scope of protection of the present invention; unless explicitly stated, any element, action or instruction used in this document should not be interpreted as critical or necessary.

Claims

1. A puncture trocar for prostate cancer, comprising: A puncture needle having a needle channel; as well as An indwelling needle tube, wherein the indwelling needle tube is sleeved outside the puncture needle, the puncture needle is configured to form a concentric sleeve structure with the indwelling needle tube, and the end of the puncture needle is located outside the indwelling needle tube, and the indwelling needle tube is detachably connected to the puncture needle; The invention is characterized in that the insertion end of the puncture needle has a shape memory alloy needle head; Wherein, the shape memory alloy needle is configured to be tubular in the low temperature phase so that prostate cancer tissue can enter the needle channel; Wherein, the shape memory alloy needle is configured to be flat in the high temperature phase so that the needle channel is partially narrowed.

2. A puncture trocar for prostate cancer according to claim 1, characterized in that: The indwelling needle tube comprises: First needle seat; as well as A first needle tube, configured to be fixedly connected to the first needle seat; Wherein, a needle holding handle is arranged on the first needle seat, and the needle holding handle and the first needle seat are integrally arranged.

3. A puncture trocar for prostate cancer according to claim 2, characterized in that: The puncture needle comprises: Second needle holder; as well as a second needle tube, configured to be fixedly connected to the second needle seat; Wherein, the needle holding handle is provided with an adsorbing member, and the second needle seat is provided with an adsorbed member matched with the adsorbing member; The adsorbent and the adsorbed part are arranged opposite to each other, and the adsorbent is used to be adsorbed on the adsorbed part.

4. A puncture trocar for prostate cancer according to claim 3, characterized in that: The second needle tube comprises: a tubular needle shaft; and Shape memory alloy needle; Wherein, the shape memory alloy needle is configured to be fixedly connected to the end of the tubular needle rod; Wherein, the tubular needle rod coincides with the central axis of the shape memory alloy needle head.

5. A puncture trocar for prostate cancer according to claim 4, characterized in that: The non-tip end of the shape memory alloy needle has a tubular insertion portion, and the outer diameter of the tubular insertion portion is smaller than the outer diameter of the shape memory alloy needle; The tubular needle rod is provided with an insertion groove matched with the tubular insertion part, the tubular insertion part is inserted into the insertion groove, and the inner tube wall of the tubular insertion part is flush with the inner tube wall of the tubular needle rod.

6. A puncture trocar for prostate cancer according to claim 5, characterized in that: An embedding body is fixedly arranged on the outer tube wall of the tubular insertion portion, and an embedding groove is arranged on the tubular needle rod, and the embedding groove is communicated with the insertion groove; When the tubular insertion portion is inserted into the insertion groove, the embedding body is embedded in the embedding groove.

7. A puncture trocar for prostate cancer according to claim 4, characterized in that: The head end of the tubular needle rod is provided with a flange, and the second needle seat is provided with a perforation and a positioning hole; The end of the tubular needle rod passes through the through hole, and the flange is embedded in the positioning hole.

8. The puncture trocar for prostate cancer according to claim 6, characterized in that: A positioning groove is provided on the inner tube wall of the tubular insertion portion; A retaining ring is fixedly arranged in the positioning groove, the inner ring surface of the retaining ring is flush with the inner tube wall of the tubular insertion portion, and the retaining ring is used to maintain the shape of the tubular insertion portion.

9. A puncture trocar for prostate cancer according to claim 8, characterized in that: There are more than one embedding body, and the embedding bodies are distributed around the retaining ring in a ring array.

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