Automatically adjustable trocar

Abstract

The present invention relates to a puncture device with automatically adjustable specifications, which includes a puncture needle and a puncture sheath matched with the puncture needle; the puncture sheath includes a puncture sheath tube and a sheath tube seat arranged at the upper end of the puncture sheath tube, the sheath tube seat is provided with a puncture channel connected to the puncture sheath tube, the puncture channel is provided with a deformable annular seal, the upper and lower sides of the annular seal are fixed on the puncture channel, and a cavity is formed in the middle. The purpose of the present invention is to provide a puncture device with automatically adjustable specifications, which can realize automatic adjustment according to surgical instruments of different specifications to ensure sealing, reduce surgical trauma and operation time of patients, and facilitate surgical operations. The advantages of the present invention are: the present invention provides a deformable annular seal on the puncture channel, and the annular seal can automatically change the size of its inner diameter according to the inserted instrument to adapt to surgical instruments of different specifications.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a puncture device capable of automatically adjusting specifications. Background Art

[0002] Currently, most of the disposable laparoscopic puncture devices on the market are of a single specification. Although there are products that allow the trial use of instruments of different sizes, most of them have air leaks, high resistance, or require manual switching of different instrument channels, which is extremely inconvenient for doctors to operate.

[0003] When a trocar of a single specification is used during surgery, multiple wounds need to be created for the patient. Disposable trocars for laparoscopy of different specifications are used to provide channels for instruments of different specifications during surgery, which increases the trauma caused by the surgery and prolongs the operation time. When an existing trocar with adjustable specifications is used during surgery, it needs to be manually adjusted by the doctor or assistant, which is not only inconvenient for the operation but also increases the possibility of misoperation. Moreover, products with large resistance or poor sealing are even more unacceptable to doctors. Summary of the invention

[0004] The purpose of the present invention is to provide a trocar with automatically adjustable specifications, which can realize automatic adjustment according to surgical instruments of different specifications to ensure sealing, reduce surgical trauma and operation time for patients, and facilitate surgical operations.

[0005] The objective of the present invention is achieved through the following technical solutions: a puncture device with automatically adjustable specifications, comprising a puncture needle and a puncture sheath cooperating with the puncture needle; the puncture sheath comprises a puncture sheath tube and a sheath tube seat arranged at the upper end of the puncture sheath tube, the sheath tube seat is provided with a puncture channel connected with the puncture sheath tube, the puncture channel is provided with a deformable annular seal, the upper and lower sides of the annular seal are fixed on the puncture channel, and a cavity is formed in the middle thereof; a sealing chamber connected with the middle cavity of the annular seal is provided on the outer peripheral side of the puncture channel, a pressure compensation mechanism is provided in the sealing chamber, the pressure compensation mechanism comprises a compensation chamber connected with the sealing chamber and a piston slidably arranged in the compensation chamber, and the piston changes the volume in the compensation chamber by displacement; the sealing chamber, the cavity and the compensation chamber are filled with a pressure body, and the annular seal is deformed by the compression of the insertion instrument, and the piston is driven to slide by the pressure body.

[0006] Compared with the prior art, the advantages of the present invention are:

[0007] 1. The present invention provides a deformable annular seal on the puncture channel, and the annular seal can automatically change the size of its inner diameter according to the inserted instrument to adapt to surgical instruments of different specifications.

[0008] 2. A sealing chamber connected to the middle cavity of the annular seal is provided on the outer peripheral side of the puncture channel. A pressure compensation mechanism is provided in the sealing chamber, which can adjust the pressure according to the deformation degree of the annular seal to ensure that the annular seal has an optimal sealing pressure on the inserted instrument.

[0009] 3. A reset member is provided on the pressure compensation mechanism. When the surgical instrument is withdrawn from the puncture device, the reset member provides elastic force for the piston to restore the annular seal to its initial state. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a structural schematic diagram of an embodiment of a trocar capable of automatically adjusting specifications (initial state).

[0011] Figure 2 The present invention is a structural schematic diagram of an embodiment (working state) of a puncture device capable of automatically adjusting specifications.

[0012] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0013] Figure 4 yes Figure 1 Enlarged view of point A in the middle.

[0014] Figure 5 yes Figure 2 Enlarged view at center C.

[0015] Explanation of reference numerals: 1 puncture needle, 2 sheath seat, 2-1 puncture channel, 2-2 sealing chamber, 3 puncture sheath, 4 annular sealing member, 4-1 cavity, 4-2 pressing piece, 5 pressure compensation mechanism, 5-1 compensation cavity, 5-2 piston, 5-3 reset member, 5-4 pressing plate, 5-5 sealing ring, 5-6 retaining ring. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0017] like Figures 1 to 5 Shown is a schematic diagram of an embodiment of a puncture device with automatically adjustable specifications provided by the present invention.

[0018] A puncture device capable of automatically adjusting specifications, comprising a puncture needle 1 and a puncture sheath matched with the puncture needle 1; the puncture sheath comprises a puncture sheath tube 3 and a sheath tube seat 2 arranged at the upper end of the puncture sheath tube 3, the sheath tube seat 2 is provided with a puncture channel 2-1 connected with the puncture sheath tube 3, the puncture channel 2-1 is provided with a deformable annular seal 4, the upper and lower sides of the annular seal 4 are fixed on the puncture channel 2-1, and a cavity 4-1 is formed in the middle thereof;

[0019] The outer peripheral side of the puncture channel 2-1 is provided with a sealing chamber 2-2 connected to the middle cavity 4-1 of the annular seal 4, and a pressure compensation mechanism 5 is provided in the sealing chamber 2-2. The pressure compensation mechanism 5 includes a compensation chamber 5-1 connected to the sealing chamber 2-2 and a piston 5-2 slidably arranged in the compensation chamber 5-1. The piston 5-2 changes the volume of the compensation chamber 5-1 by displacement;

[0020] The sealing chamber 2-2, the cavity 4-1 and the compensation cavity 5-1 are filled with a pressure body. After the annular seal 4 is compressed and deformed by the insertion instrument, the piston 5-2 is driven to slide by the pressure body.

[0021] The side wall of the puncture channel 2-1 is open, and the upper and lower sides of the annular seal 4 are fixed at the side wall opening through a pressing sheet 4-2.

[0022] The pressure body is a gas or a liquid. The pressure body needs to be non-toxic, harmless, non-reactive, and other adverse conditions to the human body, such as distilled water, pure oxygen, etc.

[0023] The annular sealing member 4 is an elastic capsule.

[0024] The annular seal 4 is made of special materials and can withstand the insertion and withdrawal of various medical instruments without being torn, punctured, penetrated or other damage.

[0025] The outer surface of the annular seal 4 is provided with a lubricating coating for reducing blockage of the instrument.

[0026] The pressure compensation mechanism 5 further includes a reset member 5-3 for providing a restoring force to the piston 5-2. The reset member 5-3 may be a reset spring.

[0027] The upper end surface of the sheath tube seat 2 is provided with a vertical slide groove extending into the sealing chamber 2-2, the piston 5-2 is slidably arranged in the vertical slide groove, a retaining ring 5-6 is provided at the bottom of the vertical slide groove, and a pressure plate 5-4 is provided at the upper end opening of the vertical slide groove.

[0028] The clamping ring 5-6, the vertical slide groove and the pressure plate 5-4 form a compensation cavity 5-1.

[0029] A sealing ring 5-5 is provided between the piston 5-2 and the inner wall of the vertical slide groove.

[0030] The reset member 5 - 3 is arranged between the pressure plate 5 - 4 and the piston 5 - 2 .

[0031] The pressure plate 5-4 is provided with a through hole for accommodating the rear end of the piston 5-2 to extend out.

[0032] The method of using the present invention is as follows:

[0033] Initially, the annular seal 4 is in its original state and has a smaller inner diameter; when the surgical instrument is used, the surgical instrument presses the annular seal 4, and the pressure body in the annular seal 4 enters the sealing chamber 2-2, and the inner diameter becomes larger, allowing the surgical instrument to pass smoothly; because the pressure body is squeezed by the annular seal 4, the piston 5-2 is prompted to move upward, and the excess pressure body enters the compensation chamber 5-1 generated by the upward movement of the piston 5-2; the reset member 5-3 exerts a downward force on the piston 5-2, prompting the pressure body to inflate the annular seal 4, thereby achieving the effect of sealing the surgical instrument.

Claims

1. A puncture device capable of automatically adjusting specifications, comprising a puncture needle (1) and a puncture sheath matched with the puncture needle (1); the puncture sheath comprises a puncture sheath tube (3) and a sheath tube seat (2) arranged at the upper end of the puncture sheath tube (3); the sheath tube seat (2) is provided with a puncture channel (2-1) connected to the puncture sheath tube (3), characterized in that: The puncture channel (2-1) is provided with a deformable annular sealing member (4), the upper and lower sides of the annular sealing member (4) are fixed on the puncture channel (2-1), and a cavity (4-1) is formed in the middle thereof; A sealing chamber (2-2) is provided on the outer peripheral side of the puncture channel (2-1) and is connected to the central cavity (4-1) of the annular sealing member (4). A pressure compensation mechanism (5) is provided in the sealing chamber (2-2). The pressure compensation mechanism (5) comprises a compensation chamber (5-1) connected to the sealing chamber (2-2) and a piston (5-2) slidably arranged in the compensation chamber (5-1). The piston (5-2) changes the volume of the compensation chamber (5-1) by displacement. The sealing chamber (2-2), the cavity (4-1) and the compensation cavity (5-1) are filled with a pressure body, and the annular sealing member (4) is deformed by the insertion instrument and then drives the piston (5-2) to slide through the pressure body; The pressure compensation mechanism (5) further comprises a restoring member (5-3) for providing a restoring force for the piston (5-2); The upper end surface of the sheath tube seat (2) is provided with a vertical slide groove extending into the sealing chamber (2-2), the piston (5-2) is slidably arranged in the vertical slide groove, a clamping ring (5-6) is provided at the bottom of the vertical slide groove, and a pressure plate (5-4) is provided at the upper end opening of the vertical slide groove; A sealing ring (5-5) is provided between the piston (5-2) and the inner wall of the vertical slide groove; The reset element (5-3) is arranged between the pressure plate (5-4) and the piston (5-2).

2. The trocar with automatically adjustable specifications according to claim 1, characterized in that: The pressure body is gas or liquid.

3. The trocar with automatically adjustable specifications according to claim 1, characterized in that: The annular sealing member (4) is an elastic capsule.

4. The trocar with automatically adjustable specifications according to claim 1, characterized in that: The outer surface of the annular seal (4) is provided with a lubricating coating for reducing blockage of the instrument.

5. The trocar with automatically adjustable specifications according to claim 1, characterized in that: The pressure plate (5-4) is provided with a through hole for accommodating the rear end of the piston (5-2) to extend out.

Images