Biopsy forceps for collecting in-vivo tissue sample

Abstract

The embodiment of the utility model discloses biopsy forceps. The biopsy forceps comprise a handle part, a connecting rod and a forceps head part, one end of the connecting rod is connected with the handle part, and the other end of the connecting rod is connected with the plier head part; the plier head part comprises a first jaw, a second jaw, a first limiting pin, a second limiting pin, an adjusting rod and a pressure sensing device; the first jaw and the second jaw are connected through a hinge, so that the first jaw and the second jaw can be opened and closed; the first limiting pin penetrates through the root part of the first jaw; the second limiting pin penetrates through the root part of the second jaw; the adjusting rod is used for adjusting the opening and closing angles of the first jaw and the second jaw in real time; the pressure sensing device is arranged at the first jaw and / or the second jaw and used for monitoring the clamping pressure of the first jaw and the second jaw on tissue in real time.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a biopsy forceps for collecting in vivo tissue samples. Background Technology

[0002] Existing biopsy forceps are mainly used to obtain tissue samples from patients for pathological analysis, but they have the following limitations during operation: the opening and closing range of the forceps is difficult to control precisely, which can easily damage the surrounding healthy tissue; the clamping force of the forceps is insufficient or unstable, which may lead to sample loss or incompleteness; and there is a lack of a real-time pressure feedback mechanism, making it difficult for the operator to judge whether excessive force has been applied, which may lead to tissue damage.

[0003] There is currently no effective solution to the above-mentioned shortcomings. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a biopsy forceps that, through optimized connection structure and enhanced functionality, solves the issues of inconvenient operation and easy tissue damage.

[0005] To achieve the above objectives, the present invention provides a biopsy forceps, comprising: a handle portion, a connecting rod, and a forceps head; one end of the connecting rod is connected to the handle portion, and the other end is connected to the forceps head; the forceps head includes a first jaw, a second jaw, a first limiting pin, a second limiting pin, an adjusting rod, and a pressure sensing device; the first jaw and the second jaw are connected by a hinge to allow the first jaw and the second jaw to open and close; the first limiting pin passes through the root of the first jaw; the second limiting pin passes through the root of the second jaw; the adjusting rod is used to adjust the opening and closing angle of the first jaw and the second jaw in real time; the pressure sensing device is disposed at the first jaw and / or the second jaw for real-time monitoring of the clamping pressure of the first jaw and the second jaw on the tissue.

[0006] Further optionally, the biopsy forceps also includes a pressure feedback device; the pressure feedback device is disposed inside the handle portion and electrically connected to the pressure sensing device, for feeding back the clamping pressure of the first jaw and the second jaw on the tissue monitored by the pressure sensing device.

[0007] Further optionally, the biopsy forceps also includes a memory function device; the memory function device is disposed in the handle portion and is used to record the opening and closing angles of the first jaw and the second jaw limited by the adjustment rod, and to record the clamping pressure of the first jaw and the second jaw on the tissue monitored by the pressure sensing device.

[0008] Alternatively, the biopsy forceps may further include a spring mechanism disposed within the handle portion for providing a restoring force to the connecting rod.

[0009] Optionally, the biopsy forceps includes a first adjusting rod and a second adjusting rod; one end of the first adjusting rod is connected to the first jaw, and the other end is connected to the second adjusting rod via a first adjustable thread; one end of the second adjusting rod is connected to the first adjusting rod via the first adjustable thread, and the other end is connected to the second jaw.

[0010] Further optionally, the biopsy forceps also includes a scale indicator; the scale indicator is disposed near the first adjustable thread and is used to indicate the lengths of the first adjusting rod and the second adjusting rod.

[0011] Further optionally, the first limiting pin of the biopsy forceps is connected to the first jaw via a second adjustable thread; the second limiting pin is connected to the second jaw via a third adjustable thread.

[0012] Alternatively, the inner surfaces of the first jaw and the second jaw of the biopsy forceps are provided with fine teeth, which are arranged in an alternating pattern.

[0013] The above technical solution has the following beneficial effects: Through the optimized design of the connection structure and the enhanced function of each component, the biopsy forceps solves the problems of inconvenient operation and easy tissue damage, improves the safety, accuracy and convenience of operation, and reduces damage to patient tissues. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the biopsy forceps provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the jaw structure of the biopsy forceps provided in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the biopsy forceps with a pressure feedback device provided in an embodiment of the present invention. Detailed Implementation

[0018] To provide a clearer and more complete understanding of the technical solution of this invention, the specific embodiments of this invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments are merely further explanations of this invention and do not constitute a limitation thereof. Without departing from the concept of this invention, those skilled in the art can make adjustments and modifications to the technical solutions in the embodiments, and these adjustments and modifications should also be considered within the scope of protection of this invention.

[0019] Example 1: Biopsy forceps with basic structure

[0020] like Figure 1 and Figure 2 As shown, this embodiment provides a biopsy forceps, including a handle 1, a connecting rod 2, and a forceps head 3. One end of the connecting rod 2 is connected to the handle 1, and the other end is connected to the forceps head 3. The forceps head 3 includes a first jaw 31 and a second jaw 32, which are connected by a hinge, allowing the first jaw 31 and the second jaw 32 to open and close. Furthermore, a first limiting pin 6 passes through the root of the first jaw 31, and a second limiting pin 7 passes through the root of the second jaw 32. The user can adjust the maximum opening of the forceps head by adjusting how much the limiting pins are inserted into the root of the jaws; an adjusting rod 8 is used to adjust the opening angle of the jaws in real time. In this way, the operator can precisely control the opening degree of the jaws by adjusting the adjusting rod 8 as needed, avoiding damage to surrounding healthy tissues.

[0021] like Figure 2 As shown, the adjusting rod is fitted with a return spring. When the adjusting rod is pulled outward from the handle, the return spring contracts and the jaws open. After locking the target tissue, the force of the handle being pulled outward is released, and the elastic force of the return spring will close the jaws to clamp the target tissue.

[0022] In this embodiment, the opening angle of the jaws can be effectively controlled by the adjusting rod 8. The adjusting rod 8 is equipped with an adjustable limiting structure. Specifically, the connecting rod 2 is hollow, and the adjusting rod 8 extends directly outward from the connecting rod 2 to the handle. A scale indicator is provided at the handle opening to display the current jaw opening angle. By adjusting the position of the scale indicator, the maximum jaw opening angle can be preset to ensure that the jaws do not exceed the predetermined range during operation. Optionally, when the handle is pulled outward, the adjusting rod 8 can be pulled outward via a knob structure, which allows for more precise control of the pulled distance and better stability. In addition, the inner surface of the jaws is provided with fine teeth arranged in an alternating pattern, which can increase the clamping force of the jaws on the tissue and ensure the integrity and stability of the sample.

[0023] Example 2: Biopsy forceps with pressure feedback device

[0024] To improve operational safety, this embodiment adds a pressure sensing device 4 and a pressure feedback device to embodiment 1, such as... Figure 3 As shown. The pressure sensing device 4 is mounted on the first jaw 31 and the second jaw 32. It outputs data to the pressure feedback device via a data cable or wireless transmission to monitor the clamping pressure of the jaws on the tissue in real time, preventing tissue damage due to excessive clamping force. The pressure sensing device 4 can electronically transmit the monitored pressure data to the pressure feedback device inside the handle 1. The operator can use the pressure feedback device to understand the clamping force of the jaws in real time and make corresponding adjustments.

[0025] During operation, the pressure sensing device 4 continuously monitors the pressure applied when the forceps clamp the tissue. When the clamping force reaches the set upper limit, the pressure feedback device will issue a warning signal, reminding the operator to reduce the force applied to avoid excessive pressure damaging the tissue. Furthermore, the pressure feedback device can display the real-time pressure value, allowing the operator to make precise controls according to the specific situation. For example, during biopsies of certain fragile or sensitive tissues, the operator can appropriately reduce the clamping force of the forceps based on the prompts from the pressure feedback device, ensuring the safety of the biopsy process.

[0026] It is important to note that in medical devices, selecting a suitable sensor requires consideration of factors such as accuracy, size, response speed, biocompatibility, and resistance to high-temperature sterilization. The following are some pressure sensor types that can be used in different implementation methods:

[0027] Strain gauge sensor:

[0028] Working principle: A strain gauge is a sensor that converts mechanical deformation into a change in resistance. When the jaws are subjected to force, a tiny deformation occurs. The strain gauge can detect this deformation and reflect the force situation through the change in resistance.

[0029] Advantages: Small size, high sensitivity, stable performance, suitable for detecting minute force changes.

[0030] Application method: Strain gauges can be attached to the key stress points of the jaws, and the clamping pressure can be measured by detecting the deformation of the jaws.

[0031] Piezoelectric sensor:

[0032] Working principle: Piezoelectric materials generate electric charge when subjected to pressure, and the amount of charge is proportional to the applied pressure.

[0033] Advantages: Fast response speed, suitable for dynamic pressure measurement, and high accuracy.

[0034] Application method: The piezoelectric sensor is embedded between the jaws to directly sense the pressure applied by the jaws.

[0035] Force Sensitive Resistor (FSR):

[0036] Working principle: When a force-sensitive resistor is subjected to pressure, its resistance changes; the greater the pressure, the lower the resistance.

[0037] Advantages: Simple structure, low cost, and easy integration.

[0038] Application method: Place a thin-film force sensor in the area where the two jaws contact each other to measure the resistance change caused by pressure.

[0039] Microelectromechanical system (MEMS) sensors:

[0040] Working principle: MEMS sensors use micromechanical structures to detect changes in pressure or force, and typically contain miniature force-sensitive elements and circuits.

[0041] Advantages: Ultra-small size, low power consumption, and high integration.

[0042] Application method: Integrate MEMS sensors into the jaws or adjustment mechanism to monitor clamping pressure in real time.

[0043] Fiber Optic Pressure Sensor:

[0044] Working principle: Pressure is measured by utilizing the changes in the optical properties of optical fibers when they are under pressure.

[0045] Advantages: Unaffected by electromagnetic interference, suitable for special environments, and highly sensitive.

[0046] Application method: The fiber optic sensor is embedded in the clamp structure to detect changes in the optical signal caused by pressure.

[0047] In a preferred embodiment of this invention, considering that biopsy forceps need to be used in a surgical environment, the sensor must meet the following requirements:

[0048] Biocompatibility: The material needs to be harmless to the human body and avoid causing allergic or rejection reactions.

[0049] High-temperature sterilization resistance: Surgical instruments need to be sterilized under high temperature and high pressure, and the sensors must be able to withstand the sterilization process.

[0050] Compact size: The sensor needs to be small enough not to affect the normal opening and closing of the jaws and operation.

[0051] Stable and reliable: During the operation, the sensor needs to provide accurate and real-time pressure data and cannot malfunction.

[0052] Based on the above requirements, strain gauge sensors and MEMS sensors are preferred embodiments of this invention. Optionally, the strain gauge is attached to the force-bearing part of the jaws, resulting in a simple structure and easy installation. Optionally, the MEMS sensor is integrated inside the jaws or adjusting rod, providing high-precision pressure measurement.

[0053] Signal transmission method:

[0054] Because the clamp head and handle need to move freely, a wired connection might interfere with operation. Therefore, wireless signal transmission is a better choice. Common wireless transmission methods include:

[0055] Bluetooth Low Energy (BLE): Low power consumption, fast transmission speed, and good compatibility.

[0056] Zigbee: Large network capacity and high security, suitable for medical environments.

[0057] Radio Frequency Identification (RFID): Can be used for simple data transmission with extremely low power consumption.

[0058] In this embodiment of the biopsy forceps, a built-in miniature wireless transmitter module is used to transmit data from the pressure sensor to the receiving device in the handle in real time. The pressure feedback device in the handle then provides feedback to the operator through a display screen, indicator lights, or vibration.

[0059] Example 3: Biopsy forceps with memory function

[0060] To improve the efficiency and accuracy of surgical procedures, this embodiment incorporates a memory function device within the handle portion 1. This device records the opening and closing angles of the jaws and the clamping pressure data, facilitating reference by the operator in subsequent operations. The memory function device can store multiple different operating parameter settings, allowing the operator to select the appropriate settings for various operational scenarios.

[0061] Specifically, the memory function can record the maximum opening angle of the jaws set by the adjustment lever 8, and the clamping pressure of the jaws monitored by the pressure sensor 4. The operator can use the memory function to recall previously used parameter settings and quickly adjust the opening angle and clamping force of the jaws. For example, when performing multiple biopsies on the same site, the operator can directly recall the previous parameter settings without repeated adjustments, greatly improving surgical efficiency.

[0062] The memory function device can also be connected to a computer or other external devices via an external interface, facilitating data export and analysis. By analyzing data such as clamping pressure and opening angle during different biopsy procedures, operators can further optimize the operation process to ensure optimal results for each operation.

[0063] Example 4: Adjustable limit pin design

[0064] like Figure 2 As shown, this embodiment improves upon the design of the first limiting pin 6 and the second limiting pin 7 based on the jaw structure. The first limiting pin 6 is connected to the first jaw 31 via a second adjustable thread, and the second limiting pin 7 is connected to the second jaw 32 via a third adjustable thread. Through the adjustable threads, the operator can adjust the position of the limiting pins according to actual needs, thereby changing the opening and closing range of the jaws.

[0065] The advantage of this design is that it allows the operator to flexibly adjust the opening angle of the jaws according to the thickness and hardness of different tissues during operation. For example, for thicker tissues, the limiting pin can be adjusted to a larger opening angle so that the jaws can completely clamp the target tissue. For thinner tissues, the limiting pin can be adjusted to a smaller opening angle to avoid unnecessary damage to surrounding tissues caused by excessive jaw opening.

[0066] Furthermore, the adjustable stop pin can extend the lifespan of the jaws. When the stop pin wears out after repeated use, the operator can adjust the thread position to continue using it without frequent replacements, thus reducing the maintenance costs of the biopsy forceps.

[0067] Example 5: Inner Surface Design of the Jaws

[0068] like Figure 3 As shown, in order to further improve the gripping stability of the jaws on the tissue, this embodiment features a special design for the inner surface of the jaws. Specifically, the inner surfaces of the first jaw 31 and the second jaw 32 are provided with staggered fine teeth. These fine teeth can increase the friction between the jaws and the tissue, preventing the tissue from slipping out during gripping.

[0069] The staggered arrangement of fine teeth not only increases the clamping force of the forceps but also distributes pressure more evenly during clamping, preventing tissue damage caused by excessive local pressure. This design is particularly suitable for fragile or slippery tissue types, effectively improving the operability of biopsy forceps.

[0070] The biopsy forceps provided by this invention solves the problems of difficult-to-control jaw opening and closing range, unstable clamping force, and lack of pressure feedback in existing technologies through several innovative designs. By combining an adjusting rod, a limiting pin, and a pressure sensing device, the operator can more precisely control the jaw opening angle and clamping force, ensuring sample integrity and surgical safety. Furthermore, the introduction of auxiliary structures such as a rotating shaft and a memory function device further enhances the flexibility and intelligence of the biopsy forceps.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A biopsy forceps, characterized in that, include: Handle, connecting rod, and pliers head; One end of the connecting rod is connected to the handle portion, and the other end is connected to the pliers head; The clamp head includes a first jaw, a second jaw, a first limiting pin, a second limiting pin, an adjusting rod, and a pressure sensing device; The first jaw and the second jaw are connected by a hinge so that the first jaw and the second jaw can be opened and closed; The first limiting pin passes through the root of the first jaw; The second limiting pin passes through the root of the second jaw; The adjusting rod is used to adjust the opening angle of the first jaw and the second jaw in real time; The pressure sensing device is located at the first jaw and / or the second jaw, and is used to monitor the clamping pressure of the first jaw and the second jaw on the tissue in real time.

2. The biopsy forceps according to claim 1, characterized in that, Also includes: Pressure feedback device; The pressure feedback device is disposed inside the handle and is electrically connected to the pressure sensing device, and is used to provide feedback on the clamping pressure of the first jaw and the second jaw on the tissue as monitored by the pressure sensing device.

3. The biopsy forceps according to claim 1, characterized in that, Also includes: Memory function device; The memory function device is disposed inside the handle and is used to record the opening and closing angles of the first jaw and the second jaw as limited by the adjustment rod, and to record the clamping pressure of the first jaw and the second jaw on the tissue as monitored by the pressure sensing device.

4. The biopsy forceps according to claim 2, characterized in that, Also includes: Spring mechanism; The spring mechanism is located inside the handle portion and is used to provide the restoring force of the connecting rod.

5. The biopsy forceps according to claim 1, characterized in that: The adjusting rod includes a first adjusting rod and a second adjusting rod; One end of the first adjusting rod is connected to the first jaw, and the other end is connected to the second adjusting rod via a first adjustable thread. One end of the second adjusting rod is connected to the first adjusting rod via the first adjustable thread, and the other end is connected to the second jaw.

6. The biopsy forceps according to claim 5, characterized in that, Also includes: Scale indicator; The scale indicator is located near the first adjustable thread and is used to indicate the lengths of the first adjusting rod and the second adjusting rod.

7. The biopsy forceps according to claim 1, characterized in that: The first limiting pin is connected to the first jaw via a second adjustable thread; The second limiting pin is connected to the second jaw via a third adjustable thread.

8. The biopsy forceps according to claim 1, characterized in that: The inner surfaces of the first jaw and the second jaw are provided with fine teeth, which are arranged in an alternating pattern.

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