A puncture needle set capable of indicating pressure and preventing backflow

Abstract

The present application relates to a kind of puncture needle kits of indicating pressure and anti-reflux, belong to medical instrument technical field.The puncture needle kit includes puncture needle and puncture needle cylinder, puncture needle and puncture needle cylinder between being equipped with a three-way pipe, three-way pipe includes channel one to puncture needle head, channel two to needle cylinder tail end and lateral branch pipe one;With channel one communication's lateral branch pipe one is equipped with movable pressure indicating member;Channel one and channel two between being provided with the anti-reflux component of blocking the channel between channel two and lateral branch pipe one, anti-reflux component is equipped with the one-way valve from channel two to channel one.The present application is indicated by setting pressure indicating component, the position of puncture needle tip;And by setting anti-reflux component, avoid body fluid loss, guarantee the safety of patient, improve the accuracy and safety of anesthetist puncture.

Description

Technical Field

[0001] This invention relates to a puncture needle kit that can indicate pressure and prevent backflow, belonging to the field of medical device technology. Background Technology

[0002] When performing spinal anesthesia, clinical anesthesiologists often rely on the sensation of puncturing the ligamentum flavum to determine the needle tip's location. However, this method is prone to misjudgment in women and the elderly with weak ligamentum flavum, leading to the needle tip penetrating the subdural space. This not only results in the loss of cerebrospinal fluid but may also damage the patient's nerves, jeopardizing both the patient's life and the anesthesiologist's occupational safety. Currently, there is no effective solution in existing technologies. Therefore, this field urgently needs a puncture needle that can indicate the needle tip's location through pressure changes and prevent cerebrospinal fluid loss due to puncture errors using an anti-backflow component, thereby ensuring patient safety and improving the accuracy and safety of anesthesiologist punctures.

[0003] Furthermore, during deep vein puncture, there is often a risk of accidentally puncturing an artery, which is often difficult to detect through changes in blood color. Previously, pressure was tested using a flat-tipped needle, resulting in arterial blood loss. Therefore, there is an urgent need in this technical field for a puncture needle that can identify whether the needle has punctured an artery through pressure changes, and that uses an anti-backflow component to prevent arterial blood loss, ensuring patient safety and improving the accuracy and safety of anesthesiologist punctures. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problem of how to obtain a puncture needle that can indicate the position of the puncture needle tip through pressure changes and prevent backflow of puncture fluid through an anti-backflow component, so as to ensure patient safety and improve the accuracy and safety of anesthesiologist puncture.

[0005] To address the aforementioned problems, the present invention provides a pressure-indicating and backflow-preventing puncture needle kit, comprising a puncture needle and a puncture syringe barrel. A three-way tube is provided between the puncture needle and the puncture syringe barrel. The three-way tube includes a channel one leading to the puncture needle tip, a channel two leading to the syringe barrel tail end away from the puncture needle tip, and a side branch tube one. A movable pressure indicator is provided in the side branch tube one, which communicates with the channel one. An anti-backflow component is provided between the channel one and the channel two to block the channel between the channel two and the side branch tube one. The anti-backflow component is provided with a one-way valve leading from the channel two to the channel one.

[0006] Preferably, one end of the side branch tube is provided with a tube interface leading to the puncture needle, and the other end of the side branch tube is provided with an opening; a movable pressure indicator is provided in the opening.

[0007] Preferably, the pressure indicator includes a protrusion one located at one end outside the opening of the side branch pipe, a protrusion two located at one end inside the side branch pipe, and a connecting rod connecting the protrusion one and the protrusion two; the connecting rod passes through the opening, and a movable seal is provided between the connecting rod and the opening.

[0008] Preferably, the connecting rod is provided with a scale.

[0009] Preferably, the three-way pipe is further provided with a second side branch pipe, one end of the anti-backflow component is provided in the second side branch pipe, and the second side branch pipe is provided with a one-way cavity for the anti-backflow component to move in one direction into the second side branch pipe.

[0010] Preferably, the second protrusion abuts against the anti-backflow component to push the anti-backflow component into the second side branch pipe; the opening of the first side branch pipe is provided with a one-way baffle, and the connecting rod of the pressure indicator is provided with a one-way movement blocking structure that matches the one-way baffle and is used to prevent the pressure indicator from moving outward from the opening.

[0011] Preferably, the unidirectional movement-stopping structure is a protrusion.

[0012] Preferably, the second side branch pipe is provided with an elastic one-way baffle for preventing the anti-backflow component from entering the cavity of the second side branch pipe.

[0013] Preferably, the second one-way baffle is an annular valve disposed on the inner side wall of the second side branch pipe; the annular valve is disposed around the anti-backflow component and is sealed to the anti-backflow component to prevent the movement of the anti-backflow component.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention uses a pressure indicator component to indicate the position of the puncture needle tip based on pressure changes within the puncture syringe; and it also incorporates an anti-backflow component to prevent fluid loss during the procedure, thus ensuring patient safety and improving the accuracy and safety of punctures performed by anesthesiologists. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the second side branch pipe structure of the present invention.

[0019] Reference numerals in the attached diagram: 1. Pressure indicator; 2. Anti-backflow assembly; 3. T-connector; 4. Needle tip; 5. Syringe tail end; 6. One-way valve; 7. One-way baffle one; 8. One-way baffle two; 9. Side branch one; 10. Side branch two; 11. Channel one; 12. Channel two; 13. Protrusion one; 14. Protrusion two; 15. Opening; 16. Connecting rod. Detailed Implementation

[0020] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0021] like Figure 1-3 As shown, the technical solution adopted by the present invention is to provide a puncture needle kit that can indicate pressure and prevent backflow, including a puncture needle and a puncture needle barrel. A three-way tube 3 is provided between the puncture needle and the puncture needle barrel. The three-way tube 3 includes a channel 11 leading to the puncture needle tip, a channel 12 leading to the tail end 5 of the needle barrel away from the puncture needle tip, and a side branch tube 9. A movable pressure indicator 1 is provided in the side branch tube 9, which is connected to the channel 11. An anti-backflow component 2 is provided between the channel 11 and the channel 12 to block the channel between the channel 12 and the side branch tube 9. The anti-backflow component 2 is provided with a one-way valve 6 leading from the channel 12 to the channel 11. One end of the side branch tube 9 is provided with a tube interface leading to the puncture needle tip, and the other end of the side branch tube 9 is provided with an opening 15. The movable pressure indicator 1 is provided in the opening 15. The pressure indicator 1 includes a protrusion 13 located at one end outside the opening 15 of the side branch pipe 1 9, a protrusion 2 14 located at one end inside the side branch pipe 1 9, and a connecting rod 16 connecting the protrusion 13 and the protrusion 2 14. The connecting rod 16 passes through the opening 15, and a movable seal is provided between the connecting rod 16 and the opening 15. The connecting rod 16 is provided with a scale. The tee pipe 3 is also provided with a side branch pipe 2 10, one end of the anti-backflow component 2 is located in the side branch pipe 2 10, and the side branch pipe 2 10 is provided with a one-way cavity for the one-way movement of the anti-backflow component 2 into the side branch pipe 2 10. The protrusion 2 14 abuts against the anti-backflow component 2 to push the anti-backflow component 2 into the side branch pipe 2 10. A one-way baffle 7 is provided at the opening 15 of the side branch pipe 1 9, and the connecting rod 16 of the pressure indicator 1 is provided with a one-way movement blocking structure that matches the one-way baffle 7 to prevent the pressure indicator 1 from moving outward from the opening 15. The one-way movement prevention structure is a protrusion 13. The side branch pipe 2 10 is equipped with an elastic one-way baffle 2 8 to prevent the anti-backflow component 2 from entering the lumen of the side branch pipe 2 10. The one-way baffle 2 8 is an annular valve located on the inner wall of the side branch pipe 2 10; the annular valve is located around the anti-backflow component 2 and is sealed to the anti-backflow component 2 to prevent its movement.

[0022] Example

[0023] This invention can improve the accuracy of spinal anesthesia puncture and deep vein puncture, and avoid the loss of body fluids such as cerebrospinal fluid and arterial blood during the corresponding procedures.

[0024] The present invention includes a puncture needle and a puncture needle barrel, and a three-way tube 3 is provided between the puncture needle and the puncture needle barrel. The three-way tube 3 includes a channel 11 leading to the tip 4 of the puncture needle, a channel 12 leading to the tail 5 of the needle barrel, and a side branch tube 9. A pressure indicator 1 that can move up and down is provided in the side branch tube 9 that communicates with the channel 11. The pressure indicator 1 can indicate the pressure in the needle cavity by communicating with the puncture needle tip.

[0025] When the pressure indicator component 1 rises at the opening 15, it indicates that the pressure inside the needle cavity is a large positive pressure; when the pressure indicator component 1 falls at the opening 15, it indicates that the pressure inside the needle cavity is a small pressure or a negative pressure.

[0026] An anti-backflow component 2 is installed between channel 11 and channel 22, which blocks the passage between channel 22 and side branch tube 9. Simultaneously, the anti-backflow component 2 is equipped with a one-way valve 6 leading from channel 22 to channel 11. The anesthetic can first enter channel 22 from the tail end of the syringe, then enter channel 11 through the one-way valve 6, and finally be output from the tip of the puncture needle.

[0027] One end of the side branch tube 9 is provided with a tube interface leading to the channel 11, and the other end of the side branch tube 9 is provided with an opening 15; a movable pressure indicator 1 is provided in the opening 15. The pressure indicator 1 is a float-shaped indicator that floats up and down at the opening 15 according to the pressure change in the syringe cavity.

[0028] The pressure indicator 1 includes a protrusion 13 located at one end outside the opening 15 of the side branch pipe 1 9, a protrusion 2 14 located at one end inside the side branch pipe 1 9, and a connecting rod 16 connecting the protrusion 13 and the protrusion 2 14; the rod body of the connecting rod 16 passes through the opening 15, and a movable seal is provided between the rod body of the connecting rod 16 and the opening 15. The connecting rod 16 is provided with a scale.

[0029] In one embodiment, a one-way baffle 7 is provided at the opening 15 of the side branch tube 9. The one-way baffle 7 can only open to one side inside the side branch tube 9, opening the passage of the opening 15. The connecting rod 16 of the pressure indicator 1 is provided with a one-way movement blocking structure that matches the one-way baffle 7 and is used to prevent the pressure indicator 1 from moving outward from the opening 15. The one-way movement blocking structure is located on the outside of the opening 15. This one-way movement blocking structure can be a protrusion 13. The pressure indicator 1 is a float-shaped indicator. Normally, due to the blocking effect of the one-way baffle 7 and the protrusion 13, the pressure indicator 1 floats up and down at the opening 15 according to the pressure change in the syringe cavity. However, when the protrusion 13 is squeezed by an external force, the one-way baffle 7 opens to one side inside the side branch tube 9, opening the passage of the opening 15. After the protrusion 13 enters the side branch tube 9 through the one-way baffle 7, the pressure indicator 1 cannot move outward from the opening 15 in the opposite direction. Pressure indicator 1 is stuck in side branch pipe 9, below opening 15.

[0030] The tee pipe 3 is also equipped with a second side branch pipe 10. One end of the anti-backflow component 2 is located in the second side branch pipe 10. The second side branch pipe 10 is a one-way cavity that can only move in one direction. The anti-backflow component 2 can only enter the second side branch pipe 10 and cannot move out in the opposite direction. The second side branch pipe 10 is equipped with an elastic one-way baffle 8 to prevent the anti-backflow component 2 from entering the cavity of the second side branch pipe 10. The one-way baffle 8 is an annular valve located on the inner wall of the second side branch pipe 10. The annular valve is located around the anti-backflow component 2 and is sealed to the anti-backflow component 2 to prevent the movement of the anti-backflow component 2. Under normal circumstances, when there is no external force pushing the anti-backflow component 2, the anti-backflow component 2 is held tightly by the annular valve and cannot move into the second side branch pipe 10.

[0031] When the protrusion 13 of the pressure indicator 1 is pressed by an external force, the one-way baffle 7 is opened to one side of the side branch pipe 9, opening the channel of the opening 15. The protrusion 13 enters the side branch pipe 9 through the one-way baffle 7. Since the protrusion 14 of the pressure indicator 1 corresponds to the anti-backflow component 2, during the process of the pressure indicator 1 entering the side branch pipe 9, the protrusion 14 first abuts against the anti-backflow component 2, and then continues to press against the anti-backflow component 2, pushing the anti-backflow component 2 into the side branch pipe 10. When the anti-backflow component 2 gradually enters the side branch pipe 10, the channels 11 and 12 are connected. The external force continues to press the protrusion 13 until the pressure indicator 1 is blocked in the side branch pipe 9, located below the opening 15. At this time, the protrusion 14 abuts against the anti-backflow component 2, and the anti-backflow component 2 enters the side branch pipe 10, and the channels 11 and 12 are connected.

[0032] The process of using this invention:

[0033] In the initial state: a pressure indicator 1 that can move up and down is installed in the side branch pipe 9; protrusion 13 and protrusion 24 are located on both sides of the one-way baffle 7, with protrusion 13 located on the outside of the one-way baffle 7; the pressure indicator component 1 can indicate the pressure in the needle cavity. An anti-backflow component 2 is installed between channel 11 and channel 212, which blocks the channel between channel 212 and the side branch pipe 9; at the same time, a one-way valve 6 is installed on the anti-backflow component 2, leading from channel 212 to channel 11. One end of the anti-backflow component 2 is located in the side branch pipe 210, and the one-way baffle 28 in the side branch pipe 210 prevents the anti-backflow component 2 from entering the cavity of the side branch pipe 210; at this time, the component is in a "pressure-indicating anti-backflow state";

[0034] Initiating the puncture procedure: During the puncture, the pressure inside the syringe can be determined by the up-and-down movement of the pressure indicator component 1 at opening 15, thus indicating the position of the needle tip. When the needle tip enters the epidural space, where there is negative pressure, the pressure indicator component 1 falls at opening 15, indicating that the pressure inside the needle cavity is low or negative. However, when the needle tip continues to advance into the subarachnoid space, where there is high pressure, the pressure indicator component 1 rises at opening 15, indicating that the pressure inside the needle cavity is high positive pressure. The correct position of the needle tip is determined by the pressure indication of the pressure indicator component 1, and the anesthetic is then injected through the one-way valve 6; the one-way valve 6 also prevents the backflow of bodily fluids.

[0035] Aspiration of bodily fluids: After successful puncture, press down on pressure indicator component 1. Due to external force, protrusion 13 of pressure indicator 1 squeezes one-way baffle 7, which opens to one side of the side branch tube 9, opening the channel of opening 15. Protrusion 13 enters the side branch tube 9 through one-way baffle 7. Since protrusion 14 of pressure indicator 1 corresponds to anti-backflow component 2, during the process of pressure indicator 1 entering the side branch tube 9, protrusion 14 first abuts against anti-backflow component 2, and then continuously squeezes anti-backflow component 2, pushing anti-backflow component 2 into side branch tube 10. When anti-backflow component 2 gradually enters side branch tube 10, channel 11 and channel 12 are connected. External force continues to squeeze protrusion 13 until protrusion 13 crosses one-way baffle 7 and enters side branch tube 9. At this time, pressure indicator 1 can no longer move outward from opening 15. Pressure indicator 1 is blocked in side branch pipe 9, located below opening 15. At this time, protrusion 14 abuts against anti-backflow component 2, and anti-backflow component 2 enters side branch pipe 10, allowing channel 11 and channel 12 to remain continuously connected. This allows for convenient aspiration of body fluid.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A pressure-indicating and backflow-preventing puncture needle kit, comprising a puncture needle and a puncture needle barrel, characterized in that, A three-way tube is provided between the puncture needle and the puncture syringe. The three-way tube includes a channel 1 leading to the puncture needle tip, a channel 2 leading to the syringe tail end away from the puncture needle tip, and a side branch tube 1. A movable pressure indicator is provided in the side branch tube 1, which is connected to the channel 1. An anti-backflow component is provided between the channel 1 and the channel 2 to block the channel between the channel 2 and the side branch tube 1. The anti-backflow component is provided with a one-way valve leading from the channel 2 to the channel 1. One end of the side branch tube is provided with a tube interface leading to the puncture needle, and the other end of the side branch tube is provided with an opening; a movable pressure indicator is provided in the opening. The pressure indicator includes a protrusion 1 located at one end outside the opening of the side branch pipe, a protrusion 2 located at one end inside the side branch pipe, and a connecting rod connecting the protrusion 1 and the protrusion 2; the connecting rod passes through the opening, and a movable seal is provided between the connecting rod and the opening. The three-way pipe is also provided with a second side branch pipe. One end of the anti-backflow component is located in the second side branch pipe. The second side branch pipe is provided with a one-way cavity for the anti-backflow component to enter the second side branch pipe. The second protrusion abuts against the anti-backflow component to push the anti-backflow component into the second side branch pipe; the opening of the first side branch pipe is provided with a one-way baffle, and the connecting rod of the pressure indicator is provided with a one-way movement blocking structure that matches the one-way baffle and is used to prevent the pressure indicator from moving outward from the opening.

2. The puncture needle kit with pressure indication and backflow prevention according to claim 1, characterized in that, The connecting rod is marked with graduations.

3. A pressure-indicating and backflow-preventing puncture needle kit according to claim 1, characterized in that, The unidirectional movement-stopping structure is a protrusion.

4. A pressure-indicating and backflow-preventing puncture needle kit according to claim 3, characterized in that, The second side branch pipe is equipped with an elastic one-way baffle to prevent the anti-backflow component from entering the cavity of the second side branch pipe.

5. A pressure-indicating and backflow-preventing puncture needle kit according to claim 4, characterized in that, The second one-way baffle is an annular valve located on the inner wall of the second side branch pipe; the annular valve is located around the anti-backflow component and is sealed to the anti-backflow component to prevent the movement of the anti-backflow component.

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