Percutaneous renal biopsy needle

Abstract

A percutaneous renal puncture biopsy sampling needle comprises a puncture needle and a puncture needle sleeve. The puncture needle is inserted into the puncture needle sleeve and can move relative to the puncture needle sleeve. The puncture needle has a needle body for puncturing biological tissue, a needle head for puncturing biological tissue is provided at one end of the needle body, the needle head extends from the corresponding end of the puncture needle sleeve, and a pressing part that can be pressed relative to the puncture needle sleeve is provided at the other end of the needle body; a limiting part for positioning the depth of the puncture needle inserted into the renal tissue in cooperation with the pressing part is provided at the end of the puncture needle sleeve away from the needle head; at least one first sampling recess for obtaining renal tissue is provided on the adjacent section of the needle body adjacent to the needle head; when the pressing part is adjusted to the lowest point, the needle head and the first sampling recess are both inserted into the renal tissue, and a renal tissue sample is obtained through the first sampling recess. The present invention can achieve the purpose of sampling for percutaneous renal puncture biopsy during percutaneous renal fistula or percutaneous renal lithotripsy.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a percutaneous renal puncture biopsy sampling needle. Background Art

[0002] Percutaneous renal puncture surgery generally includes three types, the first is percutaneous nephrostomy (PCN in English); the second is percutaneous renal lithotripsy (PNL in English); the third is percutaneous renal biopsy (PNB in ​​English). Among these three surgeries, percutaneous renal biopsy is independent of the first or second surgery; that is, when the doctor needs to do a percutaneous renal biopsy to confirm the condition before doing the first or second surgery, he needs to do a percutaneous renal biopsy first, and then do the first or second surgery according to the situation; if the doctor finds a new situation that requires a percutaneous renal biopsy during the first or second surgery, due to the limitations of the instruments for the first or second surgery, he must stop and do a percutaneous renal biopsy first, and after the percutaneous renal biopsy is completed, he can decide whether to continue or how to continue the first or second surgery according to the situation. Whether it is a percutaneous renal biopsy before surgery or a percutaneous renal biopsy during surgery, the patient needs to undergo two operations, causing two pains to the patient. Summary of the invention

[0003] In order to overcome the above problems, the invention provides a percutaneous renal biopsy sampling needle to the society, which can realize percutaneous renal biopsy sampling at the same time as percutaneous nephrostomy or percutaneous renal lithotripsy to reduce the pain of patients.

[0004] The technical solution of the present invention is to provide a percutaneous renal puncture biopsy sampling needle, comprising a puncture needle and a puncture needle cover, wherein the puncture needle is inserted into the puncture needle cover and can move relative to the puncture needle cover, wherein the puncture needle has a needle body for puncturing biological tissue, a needle head for puncturing biological tissue is provided at one end of the needle body, the needle head extends out of the corresponding end of the puncture needle cover, and a pressing part that can be pressed relative to the puncture needle cover is provided at the other end of the needle body; a limiting part for positioning the depth of the puncture needle extending into the kidney tissue by cooperating with the pressing part is provided at the end of the puncture needle cover away from the needle head; at least one first sampling recess for obtaining kidney tissue is provided on an adjacent section of the needle body adjacent to the needle head; when the pressing part is adjusted to the lowest point, the needle head and the first sampling recess are both extended into the kidney tissue, and a kidney tissue sample is obtained through the first sampling recess.

[0005] As an improvement to the present invention, at least a first protrusion is provided on the lower bottom surface of the pressing portion, a boss with an area smaller than the upper plane is provided on the upper plane of the limiting portion, and at least a first groove and a second groove are provided on the periphery of the boss; a connecting line between the first groove and the center point O of the boss and a connecting line between the second groove and the center point O of the boss form an angle α, and the angle α is greater than 0 degrees and less than 180 degrees; and the depth of the first groove is greater than the depth of the second groove; the depth of the first groove satisfies that the first sampling recess can extend into the kidney tissue for sampling, and the depth of the second groove is only used for normal puncture of the puncture needle.

[0006] As an improvement to the present invention, a second protrusion is further provided on the lower bottom surface of the pressing portion, and the first protrusion and the second protrusion are symmetrically arranged with the central axis of the needle body as the symmetry axis; a third groove with a depth equal to that of the first groove and a fourth groove with a depth equal to that of the second groove are further provided on the periphery of the boss; the first groove and the third groove are symmetrically arranged with the central axis of the puncture needle sleeve as the symmetry axis; the second groove and the fourth groove are symmetrically arranged with the central axis of the puncture needle sleeve as the symmetry axis.

[0007] As an improvement to the present invention, the puncture needle and the pressing portion are connected as one body via a connecting portion.

[0008] As an improvement to the present invention, the connecting portion is in the shape of a truncated cone that is larger at the top and smaller at the bottom; the inner diameter and shape of the hole in the limiting portion are consistent with the truncated cone shape.

[0009] As an improvement to the present invention, the cross section of the first sampling recess is triangular or teardrop-shaped, and the outer periphery of the first sampling recess is a cutting edge.

[0010] As an improvement to the present invention, at least two second sampling recesses are provided on the outer wall of the puncture needle cover at one end away from the limiting portion.

[0011] As an improvement to the present invention, an echolocation portion cooperating with an ultrasonic instrument is provided on the outer wall of the puncture needle sleeve at one end away from the limiting portion.

[0012] The present invention also provides a percutaneous renal puncture biopsy sampling needle, comprising a puncture needle and a puncture needle sleeve, wherein the puncture needle 1 is inserted into the puncture needle sleeve and can move relative to the puncture needle sleeve, wherein the puncture needle has a needle body for puncturing biological tissue, a needle head for puncturing biological tissue is provided at one end of the needle body, the needle head extends out of the corresponding end of the puncture needle sleeve, and a pressing portion that can be pressed relative to the puncture needle sleeve is provided at the other end of the needle body; a limiting portion that cooperates with the pressing portion and is used to locate the depth of the puncture needle extending into the kidney tissue is provided at the end of the puncture needle sleeve away from the needle head; at least two second sampling recesses are provided on the outer wall of the puncture needle sleeve at one end away from the limiting portion; the second sampling recess can extend into the kidney tissue, and a kidney tissue sample is obtained through the second sampling recess.

[0013] The present invention also provides a puncture sampling method using the above-mentioned percutaneous renal puncture biopsy sampling needle, comprising the following steps:

[0014] S1. Insert the puncture needle 1 into the puncture needle cover, and set the pressing part to the normal puncture position; at this time, the first sampling recess 113 is in the puncture needle cover, and only the needle tip is exposed outside the puncture needle cover;

[0015] S2, inserting the puncture needle 1 into the puncture needle cover and piercing the human skin until reaching the lesion site;

[0016] S3, withdrawing the pressing part by a predetermined distance, resetting it to the sampling position, and pressing the puncture needle along the puncture needle sleeve toward the lesion site, so that the first sampling recess extends into the lesion;

[0017] S4. The puncture needle is withdrawn from the puncture needle sleeve, and the first sampling recess takes out the lesion tissue for detection.

[0018] As an improvement to the present invention, the step S4 may be replaced by the following step S5:

[0019] S5. Move the puncture needle backward and rotate it to the normal puncture position, and then withdraw it together with the puncture needle cover.

[0020] The present invention adopts a method of providing a first sampling recess near the needle head of the puncture needle, or / and providing multiple second sampling recesses at one end of the puncture needle sleeve close to the needle head. Thus, the present invention can achieve the purpose of sampling for percutaneous renal biopsy during percutaneous nephrostomy or percutaneous renal lithotripsy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the planar structure of an embodiment of the present invention.

[0022] Figure 2 yes Figure 1Schematic diagram of the three-dimensional structure of the puncture needle.

[0023] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0024] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional structure of the puncture needle sleeve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the invention more clearly understood, the invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0026] See also Figures 1 to 4 , Figures 1 to 4 Disclosed is a percutaneous renal puncture biopsy sampling needle, comprising a puncture needle 1 and a puncture needle cover 2, wherein the puncture needle 1 is inserted into the puncture needle cover 2 and can move relative to the puncture needle cover 2, wherein the puncture needle 1 has a needle body 11 for puncturing biological tissue, wherein a needle head 111 for puncturing biological tissue is provided at one end of the needle body 11, wherein the needle head 111 extends out of a corresponding end 22 of the puncture needle cover 2, and wherein a pressing portion 12 that can be pressed relative to the puncture needle cover 2 is provided at the other end of the needle body 11; The end of the puncture needle sleeve 2 away from the needle head 111 is provided with a limiting portion 21 that cooperates with the pressing portion 12 and is used to position the depth of the puncture needle 1 extending into the kidney tissue; at least one first sampling recess 113 for obtaining kidney tissue is provided on the needle body adjacent section 112 adjacent to the needle head 111; when the pressing portion 12 is adjusted to the lowest point, the needle head 111 and the first sampling recess 113 are both extended into the kidney tissue, and the kidney tissue sample is obtained through the first sampling recess 113.

[0027] In the present invention, under normal circumstances, the puncture needle 1 is inserted into the puncture needle cover 2, the needle head 111 of the puncture needle 1 is located outside the puncture needle cover 2, and the first sampling recess 113 is located inside the puncture needle cover 2. In this case, normal puncture can be performed; when sampling is required, the relative positions of the puncture needle 1 and the puncture needle cover 2 are adjusted so that the first sampling recess 113 and the needle head 111 both enter the renal tissue, and a renal tissue sample is obtained through the first sampling recess 113.

[0028] Preferably, at least a first protrusion 122 is provided on the lower bottom surface 121 of the pressing portion 12, a boss 212 with an area smaller than the upper plane is provided on the upper plane 211 of the limiting portion 21, and at least a first groove 2121 and a second groove 2122 are provided on the periphery of the boss 212; the connecting line 2125 between the first groove 2121 and the center point O of the boss 212, and the connecting line 2126 between the second groove 2122 and the center point O of the boss 212 form an angle α, and the angle α is greater than 0 degrees and less than 180 degrees; and the depth of the first groove 2121 is greater than the depth of the second groove 2122; the depth of the first groove 2121 satisfies that the first sampling recess 113 can extend into the kidney tissue for sampling, and the depth of the second groove 2122 is only used for normal puncture of the puncture needle 1. Preferably, the angle α is at most 90 degrees.

[0029] Preferably, a second protrusion 123 is further provided on the lower bottom surface 121 of the pressing portion 12, and the first protrusion 122 and the second protrusion 123 are symmetrically arranged with the central axis of the needle body 11 as the symmetry axis; a third groove 2123 with a depth equal to that of the first groove and a fourth groove 2124 with a depth equal to that of the second groove 2122 are also provided on the periphery of the boss 212; the first groove 2121 and the third groove 2123 are symmetrically arranged with the central axis of the puncture needle sleeve 2 as the symmetry axis; the second groove 2122 and the fourth groove 2124 are symmetrically arranged with the central axis of the puncture needle sleeve 2 as the symmetry axis.

[0030] Preferably, the puncture needle 1 and the pressing portion 12 are connected as a whole via a connecting portion 13 .

[0031] Preferably, the connecting portion 13 is in the shape of a truncated cone with a larger top and a smaller bottom; the inner diameter and shape of the hole 2127 of the limiting portion 21 are consistent with the truncated cone, so that the concentricity of the puncture needle 1 and the puncture needle cover 2 can be ensured.

[0032] Preferably, the cross section of the first sampling recess 113 is triangular or teardrop-shaped, and the outer periphery of the first sampling recess 113 is a cutting edge, through which the kidney tissue can be conveniently cut.

[0033] Preferably, at least two second sampling recesses 23 are provided on the outer wall of the puncture needle cover 2 at one end away from the limiting portion 21. The plurality of second sampling recesses 23 are provided on the outer wall of the puncture needle cover 2, and the second sampling recesses 23 and the first sampling recess 113 can improve the reliability of sampling.

[0034] Preferably, an echolocation portion 24 cooperating with an ultrasonic instrument is provided on the outer wall of the puncture needle sleeve 2 at one end away from the limiting portion 21, so as to locate the insertion position of the percutaneous renal puncture biopsy sampling needle. Of course, in addition to using an ultrasonic instrument for positioning, the present invention can also be designed as an image positioning structure as needed.

[0035] The present invention also provides a percutaneous renal puncture biopsy sampling needle, comprising a puncture needle 1 and a puncture needle cover 2, wherein the puncture needle 1 is inserted into the puncture needle cover 2 and can move relative to the puncture needle cover 2, wherein the puncture needle 1 has a needle body 11 for puncturing biological tissue, wherein a needle head 111 for puncturing biological tissue is provided at one end of the needle body 11, wherein the needle head 111 extends out of a corresponding end 22 of the puncture needle cover 2, and wherein a pressing portion 12 that can be pressed relative to the puncture needle cover 2 is provided at the other end of the needle body 11; a limiting portion 21 that cooperates with the pressing portion 12 and is used to locate the depth of the puncture needle 1 extending into the inner part of the renal tissue is provided at the end of the puncture needle cover 2 away from the needle head 111; and at least two second sampling recesses 23 are provided on the outer wall of the end of the puncture needle cover 2 away from the limiting portion 21; the second sampling recess 23 can extend into the renal tissue, and a renal tissue sample is obtained through the second sampling recess 23.

[0036] The present invention also provides a puncture sampling method for a percutaneous renal puncture biopsy sampling needle, comprising the following steps:

[0037] S1. Insert the puncture needle 1 into the puncture needle cover 2, and set the pressing part 12 to the normal puncture position; at this time, the first sampling recess 113 is in the puncture needle cover 2, and only the needle head 111 is exposed outside the puncture needle cover 2;

[0038] S2, inserting the puncture needle 1 into the puncture needle cover 2 and piercing through the human skin until reaching the lesion site;

[0039] S3, the pressing part 12 is retreated a predetermined distance, reset to the sampling position, and the puncture needle 1 is pressed toward the lesion along the puncture needle cover 2, so that the first sampling recess 113 extends into the lesion;

[0040] S4, withdrawing the puncture needle 1 from the puncture needle cover 2, and taking out the lesion tissue from the first sampling recess 113 for detection.

[0041] Preferably, the step S4 can be replaced by the following step S5,

[0042] S5, withdraw the puncture needle 1, rotate it to the normal puncture position, and then withdraw it together with the puncture needle cover 2.

[0043] Without departing from the concept of the invention, all equivalent changes made by applying the contents of the invention description and drawings are considered to be included in the scope of the claims of the invention.

Claims

1. A percutaneous renal puncture biopsy sampling needle, comprising a puncture needle (1) and a puncture needle cover (2), wherein the puncture needle (1) is inserted into the puncture needle cover (2) and can move relative to the puncture needle cover (2), characterized in that: The puncture needle (1) comprises a needle body (11) for puncturing biological tissue, a needle head (111) for puncturing biological tissue is provided at one end of the needle body (11), the needle head (111) protrudes from a corresponding end (22) of the puncture needle sleeve (2), a pressing portion (12) which can be pressed relative to the puncture needle sleeve (2) is provided at the other end of the needle body (11); and a pressing portion (12) which is pressable relative to the puncture needle sleeve (2) is provided at the end of the puncture needle sleeve (2) away from the needle head (111). 2) a limiting portion (21) for positioning the depth of the puncture needle (1) extending into the kidney tissue; at least one first sampling recess (113) for obtaining kidney tissue is provided on the adjacent section (112) of the needle body adjacent to the needle head (111); when the pressing portion (12) is adjusted to the lowest point, the needle head (111) and the first sampling recess (113) both extend into the kidney tissue, and a kidney tissue sample is obtained through the first sampling recess (113); at least a first protrusion (122) is provided on the lower bottom surface (121) of the pressing portion (12); a boss (212) having an area smaller than that of the upper plane is provided on the upper plane (211) of the limiting portion (21); at least a first groove (2121) and a second groove (2122) are provided on the periphery of the boss (212); a connecting line (2125) between the first groove (2121) and the center point (O) of the boss (212), and a connecting line (2125) between the second groove (2121) and the center point (O) of the boss (212) A line (2126) connecting the first groove (2122) and the center point (O) of the boss (212) forms an angle (α), and the angle (α) is greater than 0 degrees and less than 180 degrees; and the depth of the first groove (2121) is greater than the depth of the second groove (2122); the depth of the first groove (2121) satisfies that the first sampling recess (113) can extend into the kidney tissue for sampling, while the depth of the second groove (2122) is only used for normal puncture of the puncture needle (1).

2. The percutaneous renal biopsy sampling needle according to claim 1, characterized in that: A second protrusion (123) is also provided on the lower bottom surface (121) of the pressing portion (12); the first protrusion (122) and the second protrusion (123) are symmetrically arranged with the central axis of the needle body (11) as the symmetry axis; a third groove (2123) having a depth equal to that of the first groove and a fourth groove (2124) having a depth equal to that of the second groove (2122) are also provided on the periphery of the boss (212); the first groove (2121) and the third groove (2123) are symmetrically arranged with the central axis of the puncture needle sleeve (2) as the symmetry axis; and the second groove (2122) and the fourth groove (2124) are symmetrically arranged with the central axis of the puncture needle sleeve (2) as the symmetry axis.

3. The percutaneous renal biopsy sampling needle according to claim 1 or 2, characterized in that: The puncture needle (1) and the pressing portion (12) are connected as a whole via a connecting portion (13).

4. The percutaneous renal biopsy sampling needle according to claim 3, characterized in that: The connecting portion (13) is in the shape of a truncated cone that is larger at the top and smaller at the bottom; the inner diameter and shape of the hole (2127) of the limiting portion (21) are consistent with the truncated cone shape.

5. The percutaneous renal biopsy sampling needle according to claim 1 or 2, characterized in that: The cross section of the first sampling recess (113) is triangular or teardrop-shaped, and the outer periphery of the first sampling recess (113) is a cutting edge.

6. The percutaneous renal biopsy sampling needle according to claim 1 or 2, characterized in that: At least two second sampling recesses (23) are provided on the outer wall of the puncture needle cover (2) at one end away from the limiting portion (21).

7. The percutaneous renal biopsy sampling needle according to claim 1 or 2, characterized in that: An echolocation portion (24) cooperating with an ultrasonic instrument is provided on the outer wall of the puncture needle sleeve (2) at one end away from the limiting portion (21).

8. A percutaneous renal puncture biopsy sampling needle, comprising a puncture needle (1) and a puncture needle cover (2), wherein the puncture needle (1) is inserted into the puncture needle cover (2) and can move relative to the puncture needle cover (2), characterized in that: The puncture needle (1) comprises a needle body (11) for puncturing biological tissue, a needle head (111) for puncturing biological tissue is provided at one end of the needle body (11), the needle head (111) protrudes from a corresponding end (22) of the puncture needle sleeve (2), and a pressing portion (12) that can be pressed relative to the puncture needle sleeve (2) is provided at the other end of the needle body (11); a limiting portion (21) that cooperates with the pressing portion (12) and is used to position the depth of the puncture needle (1) extending into the kidney tissue is provided at the end of the puncture needle sleeve (2) away from the needle head (111); at least two second sampling recesses (23) are provided on the outer wall of the end of the puncture needle sleeve (2) away from the limiting portion (21); the second sampling recess (23) can extend into the kidney tissue and pass through the second sampling recess (23). The second sampling recess (23) is used to obtain a kidney tissue sample; at least a first protrusion (122) is provided on the lower bottom surface (121) of the pressing portion (12); a boss (212) having an area smaller than that of the upper plane is provided on the upper plane (211) of the limiting portion (21); at least a first groove (2121) and a second groove (2122) are provided on the periphery of the boss (212); a connecting line (2125) between the first groove (2121) and a center point (O) of the boss (212) and a connecting line (2126) between the second groove (2122) and a center point (O) of the boss (212) form an angle (α), and the angle (α) is greater than 0 degrees and less than 180 degrees; and the depth of the first groove (2121) is greater than the depth of the second groove (2122).

Images