Biological tissue sampling device

Abstract

The utility model discloses a high-fidelity quick sampling device of a high-grade biological safety dissecting room, which relates to the technical field of biological sampling devices, and comprises a barrel, a first end of the barrel is provided with a cavity, an inlet communicated with the cavity is arranged at the first end of the barrel, scale marks are arranged outside the barrel, a first cutting part is arranged at the first end of the barrel, and a second cutting part is arranged at the second end of the barrel. The first cutting part has a cutting state and an idle state; the operation part is connected with the cylinder body, the operation part and the inlet are arranged in an avoiding manner, and a barrier layer is arranged between the operation part and the cylinder body; the blocking layer enables substances such as pathogens not to be attached to the operation part, the operation part is detachably connected with the second end of the cylinder body and the blocking layer, and therefore the situation that the pathogens attached to the cylinder body and the blocking layer are attached to the next biological tissue, errors are caused to follow-up identification and analysis of the next biological tissue can be avoided as far as possible. And high fidelity during sampling of different biological tissues is realized.

Description

Technical Field

[0001] This utility model relates to the field of biological material extraction technology, and in particular to a biological tissue extraction device. Background Technology

[0002] Pathological examination is a crucial method for providing vital evidence. Through methods such as autopsy, it identifies biological tissues, analyzes the true cause of death, and provides more accurate scientific evidence for effective judgment in various cases. Pathological sampling is a key step in pathological examination, and the quality of the sample plays a vital role in determining the cause of death. However, when sampling different biological tissues, interference between them can make it difficult to effectively preserve the structure, state, and biological characteristics of the tissues, leading to significant discrepancies between the subsequent pathological examination and the actual situation.

[0003] Therefore, how to reduce interference during the sampling of different biological tissues and improve the high fidelity of sampling of different biological tissues has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a biological tissue sampling device to reduce interference when sampling different biological tissues and improve the high fidelity of sampling different biological tissues.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This invention provides a high-fidelity rapid material extraction device for a high-level biosafety dissection room, the high-fidelity rapid material extraction device comprising:

[0007] A cylindrical body having a cavity for storing biological tissue, a first end of the cylindrical body having an inlet communicating with the cavity, a first cutting portion having a channel on the cylindrical body for the first cutting portion to enter the cavity, the channel communicating with the cavity;

[0008] The first cutting part has a cutting state and an idle state. When the first cutting part is in the cutting state, the first cutting part enters the cavity through the channel under the first force and moves in the cavity along the first direction, thereby applying a second force to the connection between the biological tissue in the cavity and the biological tissue outside the cavity. The second force causes the biological tissue entering the cavity to disconnect from the biological tissue located outside the cylinder. When the first cutting part is in the idle state, the first cutting part is located outside the cavity.

[0009] Wherein, the first direction and the axial direction of the cylinder are either inclined or perpendicular;

[0010] The operating part is connected to the cylinder and is disposed away from the inlet. A barrier layer is provided between the operating part and the cylinder to isolate pathogens. The operating part, the barrier layer, and the second end of the cylinder are all detachably connected.

[0011] Preferably, the first cutting portion is in line contact with the biological tissue.

[0012] Preferably, the cylinder is provided with a support portion, which is located between the two ends of the cylinder and is connected to the channel; the cutting wire includes an annular cutting portion.

[0013] Preferably, the first direction is the radial direction of the cylinder.

[0014] Preferably, the high-fidelity rapid material extraction device further includes a second cutting section, which is disposed at the first end of the cylinder, and is arranged along the circumference of the cylinder, with the second cutting section facing away from the cylinder.

[0015] Preferably, the operating part includes a first push-pull rod, a first end of the first push-pull rod is provided with a push-pull plate, the push-pull plate extends into the cavity, the push-pull plate can move along the axial direction of the cylinder, and the barrier layer is provided on the side of the push-pull plate facing the inlet.

[0016] Preferably, the cylinder is provided with a pressure relief hole; and / or, the cylinder is provided with scale lines, which are arranged along the axial direction of the cylinder.

[0017] Preferably, the first force is the torsional force exerted by the cylinder on the biological tissue when the cylinder is rotated, in which case the cylinder constitutes the first cutting part.

[0018] Preferably, the inner wall of the cavity is covered with a first isolation membrane, and the first isolation membrane is detachably connected to the cavity.

[0019] The present invention achieves the following technical advantages over the prior art:

[0020] This utility model of a high-fidelity rapid tissue sampling device includes a cylinder with a cavity inside. The first end of the cylinder has an inlet connected to the cavity, and the first end of the cylinder has a first cutting part. The cylinder has a channel for the first cutting part to enter the cavity, and the channel is connected to the cavity. The first direction is inclined or perpendicular to the axis of the cylinder. When biological tissue sampling is required, the first end of the cylinder is aligned with the biological tissue, and the cylinder is pressed into the biological tissue. After the biological tissue entering the cylinder reaches the required length, the first cutting part enters the cavity through the channel under the first force applied by the operator or mechanical equipment, and moves in the cavity along the first direction, thereby applying a second force to the connection between the biological tissue inside the cavity and the biological tissue outside the cavity, separating the biological tissue inside the cavity from the biological tissue outside the cylinder. Then, the biological tissue inside the cylinder is placed in a sealed bag or storage bag or other device, thereby completing the sampling of biological tissue.

[0021] The device incorporates a barrier layer between the operating section and the cylinder. This prevents pathogens and other substances from adhering to the operating section when sampling biological tissues, thus avoiding the problem of pathogens and other substances adhering to the operating section and then adhering to the next biological tissue entering the cavity, which could lead to errors in the pathological identification of the next biological tissue. Furthermore, the operating section and the cylinder, as well as the operating section and the barrier layer, are detachably connected. This allows the device to prevent pathogens and other impurities from the previous biological tissue from adhering to the cylinder and / or the barrier layer and causing errors in the subsequent identification and analysis of the next biological tissue by changing different cylinders and barrier layers when sampling different types of biological tissues. This improves the accuracy of pathological identification after sampling different biological tissues, thus achieving high fidelity when sampling different biological tissues. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the high-fidelity rapid material acquisition device;

[0024] Figure 2 This is an internal schematic diagram of a high-fidelity rapid material sampling device.

[0025] Figure 3 A side view schematic diagram of a high-fidelity rapid material sampling device;

[0026] Figure 4This is a structural schematic diagram of the support section;

[0027] Figure 5 This is a schematic diagram of the first hook structure;

[0028] Figure 6 This is a schematic diagram of the second hook structure;

[0029] Figure 7 This is a schematic diagram of the channel structure;

[0030] The components are as follows: 1. Second cutting section; 2. Cylinder body; 3. First push-pull rod; 4. Second push-pull rod; 5. Support section; 6. Push-pull plate; 7. Pressure relief hole; 8. First hook; 9. Second hook; 10. Cutting wire; 11. Channel; 12. Scale line. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 7 As shown, this utility model discloses a high-fidelity rapid tissue extraction device for a high-level biosafety dissection room. The high-fidelity rapid tissue extraction device includes: a cylindrical body 2, which has a cavity for storing biological tissue. The first end of the cylindrical body 2 is provided with an inlet communicating with the cavity. The cylindrical body 2 is provided with a channel 11 for a first cutting part to enter the cavity. The channel 11 is connected to the cavity. The first cutting part has a cutting state and an idle state. When the first cutting part is in the cutting state, the first cutting part enters the cavity through the channel 11 under a first force. The first cutting part cuts the biological tissue in the cavity. A second force is applied at the connection point between the biological tissue outside the cavity and the biological tissue outside the cavity, causing the biological tissue entering the cavity to disconnect from the biological tissue located outside the cylinder 2; when the first cutting part is in an idle state, the first cutting part is located outside the cavity, and the movement trajectory of the first cutting part and the biological tissue entering the cavity is avoided; the first direction is inclined or perpendicular to the axis of the cylinder; the operating part is provided with a barrier layer between the operating part and the second end of the cylinder 2, the barrier layer is used to isolate pathogens and other impurities, and the operating part, the barrier layer, and the second end of the cylinder 2 are all detachably connected.

[0034] When biological tissue sampling is required, the first end of the cylinder 2 is aligned with the biological tissue, and the cylinder 2 is pressed into the biological tissue. After the biological tissue inside the cylinder 2 reaches the required length, the first cutting part enters the cavity through the channel 11 under the first force applied by the operator or mechanical equipment, and moves in the cavity along the first direction, thereby applying a second force to the connection between the biological tissue inside the cavity and the biological tissue outside the cavity, separating the biological tissue inside the cavity from the biological tissue outside the cylinder 2. Then, the biological tissue inside the cylinder 2 is placed in a sealed bag or storage bag or other device, thereby completing the sampling of biological tissue.

[0035] The device incorporates a barrier layer between the operating section and the cylinder 2. This prevents pathogens and other substances from adhering to the operating section during tissue sampling, thus avoiding the risk of these substances adhering to subsequent tissue samples and causing errors in pathological identification. Furthermore, the detachable connections between the operating section and cylinder 2, and between the operating section and the barrier layer, allow for the replacement of different cylinders and barrier layers when sampling different types of tissues. This prevents pathogens and other impurities from the previous tissue from adhering to the next tissue, thus improving the accuracy of pathological identification after sampling different tissues and achieving high fidelity for different tissue samples. Additionally, only the barrier layer and cylinder 2 need to be replaced during tissue sampling, eliminating the need to replace the entire high-fidelity rapid sampling device. This reduces the cost associated with different tissue sampling processes.

[0036] The cylinder 2 is used to temporarily store biological tissue during the material extraction process. The cylinder 2 supports the biological tissue entering the cavity, thereby facilitating the separation of the biological tissue entering the cavity from the biological tissue located outside the cavity by the first cutting part. In addition, the cylinder 2 also isolates the biological tissue entering the cavity from the external environment, especially the operators, to avoid damage to the external environment and operators caused by biological tissues with highly contagious diseases or other serious hazards.

[0037] The first cutting section avoids the movement trajectory of the biological tissue entering the cylinder 2. This means that the first cutting section can smoothly separate the biological tissue entering the cavity from the biological tissue located outside the cavity, and will not obstruct the entry of the biological tissue or damage the biological tissue during the process of the biological tissue entering the cavity.

[0038] The first cutting part can be in line contact or surface contact with the biological tissue. Compared with surface contact, when the first cutting part is in line contact with the biological tissue, the contact area between the first cutting part and the biological tissue is smaller, and the first cutting force is mainly concentrated near the "cutting line" of the first cutting part (the cutting line can be understood as the linear cutting edge of the first cutting part), without applying additional lateral force to the biological tissue around the first cutting part. This reduces damage to the biological tissue, effectively maintains the morphological structure of the biological tissue, and further improves the fidelity when sampling different biological tissues.

[0039] When the first cutting part and the biological tissue are in line contact, the first cutting part may specifically include a cutting wire 10, such as a metal wire, which has the ability to cut biological tissue and can achieve line contact with the biological tissue. The cutting wire 10 has sufficient strength to complete the severing of the biological tissue.

[0040] The channel 11 must not significantly reduce the strength of the cylinder 2, ensuring that the cylinder 2 can be smoothly inserted into and pulled out of the biological tissue. Furthermore, the channel 11 must ensure that the cutting wire 10 can completely cut the cross-section of the biological tissue, guaranteeing that the cut biological tissue is of the required length. Specifically, the cutting wire 10 can be linear. Once the biological tissue inside the cavity reaches the preset length, the cutting wire 10 is inserted from the channel 11 on one side of the cylinder 2 and then extended from the opposite side, thus partially cutting the cross-section at the connection between the biological tissue inside and outside the cavity. The cutting wire 10 is then moved within the cavity until the connection between the biological tissue inside and outside the cavity is completely severed. At this point, the first force can be applied by the operator, and the directions of the first and second forces are the same.

[0041] Alternatively, the cutting wire 10 may not be linear, such as... Figure 3 , Figure 4 As shown, a support portion 5 is provided on the cylinder 2, located between the two ends of the cylinder 2. The support portion 5 is connected to the channel 11, and the cutting wire 10 includes an annular cutting portion. The support portion 5 can be made of either a rigid or elastic material. When the support portion 5 is an elastic support portion, after the biological tissue entering the cavity reaches the required length, the support portion 5 will deform when the cutting wire 10 retracts inward, so that the cutting wire 10 can completely sever the connection between the biological tissue inside the cavity and the biological tissue outside the cavity. After cutting, the support portion 5 can return to its original shape under its own elastic force. The first cutting portion can be fitted onto the support portion 5 before or after the biological tissue enters the cavity. After the biological tissue enters the cavity, the operator squeezes and retracts the first cutting portion inward until the first cutting portion completes the severance at the connection between the biological tissue inside and outside the cavity.

[0042] The first cutting part can be a cutting wire 10 with a certain degree of elasticity. For example, the first end of the cutting wire 10 is bent or welded to form a first ring, and the other areas of the cutting wire 10 are inserted into the first ring. The cutting wire 10 also forms a second ring, meaning that the area of ​​the cutting wire 10 other than the first ring is slidably connected to the first ring. For this reason, the size of the second ring can be adjusted by sliding the first ring in the area of ​​the cutting wire 10 other than the first ring. At this time, the second ring is fitted outside the support part 5. When the biological tissue enters the cavity to the required length, the second ring retracts inward until the cutting wire 10 completes the severing of the connection between the biological tissue inside and outside the cavity. Furthermore, the second end of the cutting wire 10 can be directly pulled by the operator. In this case, the directions of the first force and the second force are perpendicular, or, as... Figure 6 , Figure 7 As shown, when the operating unit is set along the direction in which biological tissue enters the cavity, the second end of the cutting wire 10 can also be connected to the second hook 9 on the second push-pull rod 4 of the operating unit. By pulling the second push-pull rod 4 away from the entrance, the cutting wire 10 moves in the channel 11 and retracts towards the inside of the cavity, thus completing the cutting of the connection between the biological tissue inside the cavity and the biological tissue outside the cavity.

[0043] Alternatively, the first cutting section may not adopt the above form. For example, the first force includes the torsional force exerted by the cylinder 2 on the biological tissue when the cylinder 2 rotates, and the torsional force generated by the rotation of the cylinder 2 is large enough to smoothly separate the biological tissue inside the cavity from the biological tissue outside the cavity. In this case, the cylinder 2 is equivalent to the first cutting section. Specifically, when the separation between the biological tissue inside the cavity and the biological tissue outside the cavity is achieved by the torsional force exerted by the rotation of the cylinder 2 on the biological tissue, it is necessary to ensure that the torsional force generated by the rotation of the cylinder 2 can be effectively transmitted to the biological tissue. To achieve this effect, the cavity and the biological tissue entering the cavity may be an interference fit, or the cavity and the biological tissue entering the cavity may not be an interference fit, but there may be a sufficiently large frictional force between the cavity and the biological tissue entering the cavity; or the connection between the biological tissue inside the cavity and the biological tissue outside the cavity may be clamped by a clamping mechanism; or other fitting methods or structures that can satisfy the condition that the torsional force generated by the rotation of the cylinder 2 can be effectively transmitted to the biological tissue.

[0044] The operating section can be a handheld part used by operators when collecting biological tissue samples. Depending on the requirements, the operating section can be a solid or hollow structure. By including the operating section, the operator's body temperature is prevented from being directly transferred to the biological tissue through the cylinder 2, reducing the damage to the biological tissue structure caused by the operator's body temperature and ensuring the accuracy of pathological identification after tissue collection. The barrier layer can be configured in various ways. Specifically: when the cavity and the operating section are connected, the barrier layer is located on the side of the cavity facing the barrier layer and / or the side of the operating section facing the cavity. The barrier layer can be an isolation membrane, isolation plate, or other structure that reduces or even isolates pathogens and other impurities in the cavity and prevents pathogens and other impurities from contaminating the operating section. When the cavity and the operating section are not connected, the shell of the cylinder 2 and the operating section act as the barrier layer. The operating section can be arranged along the axial direction of the cylinder 2 or not, for example, connected to the side of the cylinder 2, depending on the working conditions. At this time, the first force includes the torsional force of the cylinder 2 acting on the biological tissue, the frictional force between the cylinder 2 and the biological tissue, and the clamping force applied by the clamping mechanism to the biological tissue (if the working conditions require, the clamping mechanism can be omitted, as long as the frictional force between the cylinder 2 and the biological tissue is large enough).

[0045] like Figure 1 , Figure 2 , Figure 3 As shown, the high-fidelity rapid tissue sampling device of this invention also includes a second cutting section 1. The second cutting section 1 is located at the first end of the cylinder 2 and is arranged circumferentially along the cylinder 2. The area of ​​the second cutting section 1 with cutting capability faces away from the cylinder 2. With this arrangement, when the high-fidelity rapid tissue sampling device of this invention performs biological tissue sampling, pressing the cylinder 2 into the biological tissue allows the biological tissue to enter under the combined action of the pressing force and the cutting force of the second cutting section 1, allowing some of the biological tissue to enter the cavity. Obviously, with the assistance of the second cutting section 1, the process of some biological tissue entering the cavity is smoother, the biological tissue sampling is more fluid, and the biological tissue sampling time is shorter. Furthermore, this avoids the problem that if there is no cutting structure at the first end of the cylinder 2, and only pressing allows some biological tissue to enter the cavity, some of the biological tissue may be pulled or damaged by the cylinder 2, reducing the fidelity of subsequent biological tissue sampling.

[0046] However, it should be understood that the second cutting part 1 is not a necessary structure. When the strength of the cylinder 2 is sufficient, the force of pressing the cylinder 2 into the biological tissue is sufficient, and the biological tissue will not be damaged to a large extent, the second cutting part 1 is not required. The cylinder 2 can be pressed directly into the biological tissue so that some of the biological tissue can enter the cavity.

[0047] like Figure 1 , Figure 2As shown, the operating unit includes a first push-pull rod 3. A push-pull plate 6 is located at the first end of the first push-pull rod 3, and the other end is the operating end. The push-pull plate 6 extends into the cavity and can move axially along the cylinder 2. A barrier layer is located on the side of the push-pull plate 6 facing the inlet. Thus, when the biological tissue has entered the cavity to the required length, the first cutting part cuts off the connection between the biological tissue inside and outside the cavity. Subsequently, the operator moves the first push-pull rod 3 towards the inlet to push the biological tissue out of the cavity and place it in a sealed bag or storage bag. After one biological tissue sampling is completed, the barrier layer needs to be replaced to prevent pathogens and other impurities on the barrier layer from contaminating the next biological tissue sample. If the barrier layer is integrally formed with the first push-pull rod 3, the first push-pull rod 3 is replaced along with it.

[0048] like Figure 2 , Figure 5 As shown, the barrier layer can be a second isolation film. The second isolation film can be directly sleeved on the push-pull plate 6, or, in addition to being sleeved on the push-pull plate 6, the two ends of the second isolation film can also be hung on the first pull hook 8 arranged circumferentially along the operating part.

[0049] As with 1, Figure 2 As shown, the cylinder 2 is equipped with a pressure relief hole 7, which allows air inside the cavity to be discharged in a timely manner when biological tissue enters the cavity, ensuring the smooth entry of biological tissue into the cavity. A scale line 12 is provided on the outside of the cylinder 2, arranged along the axial direction of the cylinder 2. The first end of the cylinder 2 has a first cutting section for cutting biological tissue. By observing the scale line, the operator can clearly understand the depth to which the cylinder 2 is inserted into a large volume of biological tissue, i.e., the length of the biological tissue entering the cavity. This allows for obtaining the required length of biological tissue when using the high-fidelity rapid sampling device of this invention, making the sampling of biological tissue more standardized and regulated. The cylinder 2 can also be configured as a visual cylinder 2, allowing the operator to more clearly observe the length and state of the biological tissue entering the cavity.

[0050] In this invention, the inner wall of the cavity is covered with a first isolation membrane. The first isolation membrane is detachably connected to the cavity, for example, by bolts or snap-fit. The first isolation membrane isolates the biological tissue from the cavity, preventing pathogens and other impurities on the biological tissue from contaminating the cavity. This allows the high-fidelity rapid sampling device of this invention to directly disassemble and replace the first isolation membrane after completing one biological tissue sampling, thereby preventing pathogens and other impurities in the cavity from adhering to the next biological tissue to be sampled, ensuring the fidelity of sampling different biological tissues.

[0051] It should be noted that in the high-fidelity rapid tissue sampling device for a high-level biosafety dissection chamber in this utility model, "high-level biosafety" refers to the device's ability to sample biological tissues from apes and humans; "safety" means that during the tissue sampling process, the biological tissue within the chamber is fixed inside the cylinder 2, with no direct contact between the tissue and the operator, making the tissue sampling process relatively safe; "dissection chamber" means that the device can perform tissue sampling within a dissection chamber; and "high fidelity" refers to the fact that the operating part, cylinder 2, and isolation layer are detachably connected, preventing pathogens from the previous biological tissue from adhering to the cylinder 2, isolation layer, and operating part. Regarding the issue of reducing the accuracy of biological tissue identification when sampling biological tissue, and if the working conditions require, for example, a high degree of fidelity in biological tissue sampling, in addition to the detachable connection between the operating part, the cylinder 2, and the isolation layer, "high fidelity" also includes direct line contact between the first cutting part and the biological tissue located in the cavity, that is, the first cutting part completes the separation of the biological tissue inside the cavity and the biological tissue outside the cavity by wire cutting; "fast" means that the setting of the second cutting part 1 makes the biological tissue enter the cylinder 2 at a faster rate, and the sampling device of this utility model can achieve high-fidelity sampling of biological tissue without the need for additional equipment, and the sampling steps are relatively simple.

[0052] "And / or" refers to the text content preceding "and / or" and the text content following "and / or", which can exist simultaneously or separately. For example, "A and / or B" includes three cases: A and B exist simultaneously, or A or B exist separately.

[0053] This utility model discloses multiple technical solutions, but does not provide any contrary technical teachings.

[0054] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A biological tissue sampling device, characterized in that, The biological tissue sampling device includes: A cylindrical body having a cavity for storing biological tissue, a first end of the cylindrical body having an inlet communicating with the cavity, a first cutting portion having a channel on the cylindrical body for the first cutting portion to enter the cavity, the channel communicating with the cavity; The first cutting part has a cutting state and an idle state. When the first cutting part is in the cutting state, the first cutting part enters the cavity through the channel under the first force and moves in the cavity along the first direction, thereby applying a second force to the connection between the biological tissue in the cavity and the biological tissue outside the cavity. The second force causes the biological tissue entering the cavity to disconnect from the biological tissue located outside the cylinder. When the first cutting part is in the idle state, the first cutting part is located outside the cavity. Wherein, the first direction is either inclined or perpendicular to the axial direction of the cylinder; The operating part is connected to the cylinder and is disposed away from the inlet. A barrier layer is provided between the operating part and the cylinder to isolate pathogens. The operating part, the barrier layer, and the second end of the cylinder are all detachably connected.

2. The biological tissue sampling device according to claim 1, characterized in that, The first cutting portion is in line contact with the biological tissue.

3. The biological tissue sampling device according to claim 2, characterized in that, The cylinder is provided with a support part, which is located between the two ends of the cylinder and is connected to the channel; the first cutting part is a cutting wire, which includes an annular cutting part.

4. The biological tissue sampling device according to claim 1, characterized in that, The first direction is the radial direction of the cylinder.

5. The biological tissue sampling device according to claim 1, characterized in that, The biological tissue sampling device further includes a second cutting section, which is located at the first end of the cylinder and is arranged circumferentially along the cylinder, with the second cutting section facing away from the cylinder.

6. The biological tissue sampling device according to claim 1, characterized in that, The operating part includes a first push-pull rod, and a push-pull plate is provided at the first end of the first push-pull rod. The push-pull plate extends into the cavity and can move along the axial direction of the cylinder. The barrier layer is provided on the side of the push-pull plate facing the inlet.

7. The biological tissue sampling device according to claim 1, characterized in that, The cylinder is provided with a pressure relief hole; and / or, the cylinder is provided with scale lines, which are arranged along the axial direction of the cylinder.

8. The biological tissue sampling device according to claim 1, characterized in that, The inner walls of the cavity are all covered with a first isolation membrane, which is detachably connected to the cavity.

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