CN112006726B

CN112006726B - Pneumatic tissue biopsy system

Info

Publication number: CN112006726B
Application number: CN202010894246.3A
Authority: CN
Inventors: 史文勇
Original assignee: Hocer Beijing Medical Technologies Co ltd
Current assignee: Hocer Beijing Medical Technologies Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-05-03
Anticipated expiration: 2040-08-31
Also published as: CN112006726A

Abstract

The embodiment of the invention discloses a pneumatic tissue biopsy system, which comprises a biopsy instrument and a pneumatic assembly, wherein the biopsy instrument comprises: the biopsy instrument comprises a housing, a puncture cutter assembly, a cutting cutter assembly and a vacuum system, wherein the puncture cutter assembly comprises an outer sleeve, the outer sleeve is arranged on the housing, and the outer sleeve comprises an axial groove for biopsy sampling; the cutting tool assembly comprises a cutting tool and a driving part, the driving part comprises a power piston, the cutting tool is arranged in the outer sleeve and fixedly arranged on the power piston, a cavity is formed in the cutting tool, the edge of the far end of the cutting tool is sharp, the pneumatic assembly drives the driving part, the driving part drives the cutting tool to axially move, and the vacuum system is used for forming vacuum in the puncture tool assembly. The pneumatic tissue biopsy system provided by the invention adopts the pneumatic system to provide the power for tissue cutting, and the cutting tool can ensure that the tissue is completely cut off when the tissue is sampled because the pressurized gas power is sufficient and the power is controllable.

Description

Pneumatic tissue biopsy system

Technical Field

The invention relates to a minimally invasive surgery device, in particular to a biopsy system.

Background

In the diagnosis and treatment of breast cancer, it is often necessary to remove multiple tissue samples from a suspicious mass. If the preliminary examination reveals a suspicious mass, the mass must be evaluated by biopsy to determine whether the mass is malignant or benign. Early diagnosis of breast cancer and other forms of cancer can prevent cancer cells from spreading to other parts of the body and ultimately preventing fatal outcomes. Due to the fact that the power of the conventional vacuum auxiliary biopsy equipment is insufficient, a cutting tool often cannot completely cut off tissues when the tissues are sampled, and medical accidents occur due to adhesion between the tissues and a human body when the tissues are sampled in a vacuum environment; failure to completely sever the tissue even after the first advancement of the cutting blade results in the necessary second advancement of the cutting blade, thereby extending the operative time, which greatly affects the trauma to the patient. Therefore, there is a need in the market for a biopsy instrument that ensures that a successful and complete cut is made each time a biopsy is taken, and that minimizes the time of the procedure.

In addition, the current vacuum assisted biopsy device uses electric energy as a driving energy source, a motor is required to be arranged, and the generated electromagnetic radiation can influence the normal operation of MRI (magnetic resonance imaging), so that the device cannot be used with MRI (magnetic resonance imaging), and MR I (magnetic resonance imaging) is the most accurate mode capable of determining the tumor margin at present.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a pneumatic tissue biopsy system, comprising a biopsy instrument and a pneumatic assembly, wherein the biopsy instrument comprises: the biopsy instrument comprises a housing, a puncture cutter assembly, a cutting cutter assembly, a pneumatic assembly and a vacuum system, wherein the puncture cutter assembly comprises an outer sleeve, the outer sleeve is arranged on the housing, and the outer sleeve comprises an axial groove for biopsy sampling; the cutting tool assembly comprises a cutting tool and a driving part, the driving part comprises a power piston, the power piston is arranged in the shell, the cutting tool is arranged in the outer sleeve, a cavity is formed in the cutting tool, the edge of the far end of the cutting tool is sharp, the pneumatic assembly drives the driving part, the driving part drives the cutting tool to move axially, and the vacuum system is used for forming vacuum in the puncture tool assembly.

Furthermore, the pneumatic assembly comprises a piston cylinder, an air passage and a power cavity, the piston cylinder compresses air in the piston cylinder by adopting a piston, the compressed air acts on the power piston of the power cavity through the air passage, the cutting tool is fixedly arranged on the power piston, a return spring is also fixedly arranged on the power piston, and the other end of the return spring abuts against the far end of the inner wall of the power cavity.

Furthermore, the biopsy instrument also comprises an air valve.

Furthermore, the biopsy instrument also comprises an air pressure sensor, and the air pressure sensor is electrically connected with the air valve switch through a circuit.

The pneumatic tissue biopsy system provided by the invention adopts the pneumatic system to provide the power for tissue cutting, and the cutting tool can ensure that the tissue is completely cut off when the tissue is sampled because the pressurized gas power is sufficient and the power is controllable. The pneumatic tissue biopsy system provided by the invention can be used in combination with MRI (magnetic resonance imaging), can determine the tumor margin more accurately, and is favorable for accurately positioning pathological change tissues to accurately sample tissues.

Drawings

FIG. 1 is a schematic view of a pneumatic biopsy system according to the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the "proximal end" is the end of the electrocoagulation biopsy knife that is relatively close to the operator when the operator is holding the electrocoagulation biopsy knife, and correspondingly, the "distal end" is the end of the electrocoagulation biopsy knife that is relatively far from the operator when the operator is holding the electrocoagulation biopsy knife.

Example 1

As shown in fig. 1, a pneumatic biopsy system 1 includes a biopsy instrument 2 and a pneumatic assembly 8, the biopsy instrument 2 being hand-holdable. The biopsy instrument 2 comprises: the biopsy instrument comprises a shell 3, a puncture cutter assembly 4, a cutting cutter assembly 5, a tissue container 6 and a vacuum system 7, wherein the shell 3 is used for supporting various parts and structures of the biopsy instrument 2, the puncture cutter assembly 4 comprises an outer sleeve 41, the outer sleeve 41 comprises an axial notch 42 used for biopsy sampling, the proximal end of the puncture cutter assembly 4 is arranged on the shell 3, after the biopsy sampling operation is started, the puncture cutter assembly 4 enters the position near to the tissue to be cut in the body through a guide port entering the body, and the axial notch 42 of the outer sleeve 41 faces the tissue to be cut to wait for the execution of the cutting action; the vacuum system 7 is used for forming vacuum in the puncture cutter assembly 4, at the moment, the vacuum system 7 starts the vacuumizing action, negative pressure is formed in the puncture cutter assembly 4 relative to the outside due to the vacuumizing, and the tissue to be cut outside the axial slot 42 is sucked into the axial slot 42; the cutter assembly 5 comprises a cutter 51 and a drive member, the cutter 51 is disposed in the outer sleeve and is fixedly disposed on the power piston, the cutter 51 has a cavity therein, the distal edge of the cutter 51 is sharp, the tissue can be cut rapidly, the driving part comprises a power piston 52 and a return spring 53, the power piston 52 is arranged in the shell 3 and is in airtight contact with the inside of the shell 3, the driving part is powered by a pneumatic assembly 8, the driving part drives the cutting tool 51 to move, the tissue to be cut is sucked into the axial groove 42, the pneumatic assembly 8 drives the power piston 52 to move towards the far end in the axial direction, the cutting blade 51 cuts the tissue drawn into the axial slot 42 and the cut tissue is drawn through the lumen of the cutting blade 51 by the vacuum system 7 and into the tissue receptacle 6, the tissue receptacle 6 being adapted to receive the cut tissue.

The pneumatic assembly 8 comprises a piston cylinder having an open end in which a piston is arranged, the piston being axially movable within the piston cylinder and being in gas-tight contact with the piston cylinder, an air passage 82 and a power chamber 83.

The piston is connected with a driving motor through a driving shaft, the driving motor drives the piston to continuously move back and forth in the axial direction of the piston, so that the pressure level in the power cavity is increased and reduced, when the piston is driven by a driving motor 85 to move towards the axial far end direction, the piston compresses gas in a piston cylinder, the compressed gas enters the power cavity 83 through an air channel 82, the power piston 52 is in air-tight contact with the inside of the shell 3, the power piston 52 moves towards the axial far end under the action of the compressed gas, and the cutting tool 51 is fixedly arranged on the power piston 52 and moves towards the axial far end to realize cutting action. The power piston 52 is also provided with a return spring 53, and the other end of the return spring 53 is abutted against the far end of the inner wall of the power cavity. When the cutting tool 51 moves towards the axial far end to realize the cutting action, the return spring 53 is compressed, and after the cutting action is finished, the driving motor 85 drives the piston 84 to move towards the near end along the axial direction, the pressure in the power cavity 83 is reduced, the return spring 53 returns to the original position, and meanwhile, the cutting tool 51 is driven to move towards the near end original position axially.

The biopsy instrument 2 comprises an air valve, one end of the air valve is communicated with the piston cylinder, and the other end of the air valve is a pressurized air source inlet.

The biopsy instrument 2 further comprises an air pressure sensor, one end of the air pressure sensor is communicated with the piston cylinder to detect air pressure in the piston cylinder, and the air pressure sensor is electrically connected with a control switch, and the control switch can be a triode switch. The control switch is electrically connected with the air valve, when the air pressure sensor senses that the pressure value in the piston cylinder is lower than a preset value, the air pressure sensor transmits a low-pressure signal to the control switch, the control switch conducts the air valve, pressurized air of the pressurized air source is conducted to enter the piston cylinder, when the air pressure sensor senses that the pressure value in the piston cylinder reaches the preset value, the air pressure sensor transmits a pressure signal to the control switch, the control switch closes the air valve, and the process of introducing the pressurized air is finished.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pneumatic tissue biopsy system comprising a biopsy instrument and a pneumatic assembly, the biopsy instrument comprising: a housing, a piercing cutter assembly, a cutting cutter assembly, a tissue receptacle and a vacuum system, the piercing cutter assembly including an outer sleeve disposed on the housing, the outer sleeve including an axial slot for biopsy sampling; the cutting tool assembly comprises a cutting tool and a driving part, the driving part comprises a power piston arranged in a shell, the cutting tool is arranged in an outer sleeve and is fixedly arranged on the power piston, the edge of the far end of the cutting tool is sharp, a cavity is arranged in the cutting tool, the pneumatic assembly drives the driving part, the driving part drives the cutting tool to axially move, and the vacuum system is used for forming vacuum in the puncture tool assembly;

starting a vacuum pumping action of the vacuum system, pumping vacuum in the puncture cutter assembly, and sucking the tissue to be cut outside the axial slot into the axial slot;

the pneumatic assembly is started, the driving motor drives the piston in the piston cylinder to move towards the axial far-end direction, the piston compresses gas in the piston cylinder, the compressed gas enters the power cavity and enables the power piston to drive the cutting tool to move towards the axial far-end direction and compress the return spring, the cutting tool cuts off tissues sucked into the axial grooving, and the cut tissues are pumped out through the inner cavity of the cutting tool under the action of the vacuum system and enter the tissue container;

and starting the driving motor to enable the piston to move towards the near end along the axial far end, reducing the pressure in the power cavity, and enabling the return spring to restore to the original position and simultaneously driving the cutting tool to axially move to the near end original position.

2. The pneumatic biopsy system of claim 1, wherein the pneumatic assembly comprises the piston cylinder, an air passage and the power chamber, the power chamber is formed by a biopsy instrument housing, a power piston is arranged in the power chamber, the piston cylinder compresses air in the piston cylinder by the piston, the compressed air acts on the power piston of the power chamber through the air passage, the power piston is further fixedly provided with the return spring, and the other end of the return spring abuts against the far end of the inner wall of the power chamber.

3. The pneumatic tissue biopsy system of claim 2, wherein the biopsy instrument further comprises a gas valve.

4. The pneumatic tissue biopsy system of claim 3, wherein: the biopsy instrument further comprises an air pressure sensor, and the air pressure sensor is electrically connected with the air valve switch through a circuit.