Puncture indicating device and system and method using puncture indicating device

Abstract

The invention relates to the technical field of medical instruments, and provides a puncture indicating device and a system and method using the puncture indicating device. Comprising a puncture needle and a hard bottle body which can be connected with each other, wherein at least one end part of the hard bottle body is provided with a sealing element, and the sealing element can keep the sealing state of the hard bottle body before and after the liquid medicine is injected; the hard bottle body is at least partially transparent and is used for observing the descending distance of the liquid level in the vertical liquid cavity in the hard bottle body. The device has the beneficial effects that liquid medicine (normal saline) is injected into the sealed hard bottle body which is at least partially transparent in advance, and the liquid medicine extrudes a gas medium in the hard bottle body to compress the gas medium; firstly, the puncture needle is punctured into a human body, then the hard bottle body and the puncture needle are connected, and then puncture is continued; when the puncture needle penetrates through the ligamentum flavum (entering the epidural space) of a human body, the liquid level height of the liquid medicine in the hard bottle body is obviously reduced under the action of the pressure of the compressed gas medium in the bottle no matter whether the pressure in the epidural space is negative pressure or weak positive pressure lower than the tissue pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a puncture indication device and a system and method using the same. Background Art

[0002] Epidural and combined spinal-epidural anesthesia / analgesia are important neuroaxial block anesthesia / analgesia techniques. Their implementation relies on highly difficult puncture techniques, requiring the anesthesiologist to use a puncture needle to puncture layer by layer to reach the epidural space and the deeper subarachnoid space. During the puncture process, traditionally, it is necessary to experience whether there is a sense of emptiness to determine whether the yellow ligament has been broken through and the epidural space has been reached; and the resistance disappearance method and negative pressure method are used to determine whether the puncture needle has reached the epidural space.

[0003] The prior art mainly determines whether the puncture needle reaches the epidural space in the following manner.

[0004] Chinese patent CN221331385U discloses an epidural space puncture positioning device. The discharge port at the right end of the syringe 4 is inserted into the medicine bottle, and then the piston 6 is moved to the left by pulling the support plate 9 to suck the liquid in the medicine bottle into the syringe 4, and then the needle of the needle body 2 is inserted into the patient's body tissue, and then the support plate 9 is pressed to the right to make the liquid in the syringe 4 enter the silicone sleeve 10, and the silicone sleeve 10 expands to squeeze the multiple groups of pressure sensors 13, and at the same time, the limiting plate 5 is used to limit the limiting ball 8 moved to the right side of the limiting plate 5, and after the needle of the needle body 2 is inserted into the patient's epidural space, the liquid in the syringe 4 flows into the patient's epidural space, and at the same time, the liquid in the silicone sleeve 10 flows back into the syringe 4, which is convenient for the doctor to judge the position of the needle by observing the changes in the silicone sleeve 10.

[0005] Chinese patent CN87209815U discloses an automatic resistance vanishing device for epidural puncture. It is composed of an injection syringe, a piston, a pull rod, a spring, a barrel cover, and a handle. It is a judgment locator when injecting anesthetic drugs into the epidural space. This product uses the force of the spring to replace the force of pressurizing the syringe by hand. Both hands can control the force and direction of the puncture needle, which increases the safety factor. When the needle tip enters the epidural space, the force of the spring can automatically eliminate the resistance, which is not affected by the negative pressure principle of the epidural space, improves the positioning accuracy, is easy to operate clinically, can be sterilized by high pressure, and is safe and reliable.

[0006] A syringe is disclosed in US Pat. No. 005902273A, which is designed to be used with an epidural needle to identify the epidural space and protect the punctured dura mater when a loss of positive pressure occurs. The syringe housing of the present invention has a plunger having a longitudinal hole for pressurization, and the plunger is connected to a pressure chamber through a one-way valve that only allows air to flow from the syringe housing into the pressurization chamber. The needle is airtightly connected to the pressurization chamber through a needle connection device. A pressure indicator connected to the pressurization chamber objectively indicates the loss of positive pressure when the needle enters the epidural space.

[0007] Chinese patent CN102488545A discloses an epidural space puncture needle, which includes a needle body, a needle core and a water-containing device. The needle core is sleeved in the needle body, and the water-containing device is installed at the tail of the needle core. The tail end of the needle core is a cone with a large bottom and a small top. The front end of the cone is a torus, and the front ends of the torus are a connector and a core body in sequence; the core body is a straight rod plus an arc elbow at its front end, and there is a longitudinal water-passing cavity on the needle core. The water-passing cavity is provided from the arc elbow to the outer bevel of the arc elbow, and a diaphragm is attached to the outer bevel; the water-containing device includes a connecting sleeve, a silicon capsule, and a plastic capsule. The present invention uses the continuous shrinkage of the silicon capsule to judge that the needle tip has entered the epidural space and stops the puncture operation, which overcomes the difference in hand sensitivity of different operators, brings great convenience to the operator, reduces the mental stress during the operation, and more importantly, reduces the pain of repeated punctures for patients, and will not puncture the dura mater to bring life-threatening danger to patients.

[0008] Since it is uncertain whether the epidural space is negative pressure, if it is non-negative pressure (weak positive pressure lower than tissue pressure), the use of some of the above devices has certain limitations. The above structure is slightly complicated, the production is difficult, the clinical operation is also difficult, the practicality is poor, and it is not convenient for clinical application. In view of this, the present invention is proposed. Summary of the invention

[0009] The object of the present invention is to provide a puncture indication device and a system and method using the same, so as to solve the technical problems existing in the prior art.

[0010] To achieve the above object, the technical solution adopted by the present invention is: a puncture indication device, comprising: a puncture needle and a hard bottle body that can be connected to each other; wherein at least one end of the hard bottle body is provided with a sealing member, and the sealing member can maintain the sealing state of the hard bottle body before and after the injection of the liquid medicine;

[0011] The hard bottle body is at least partially transparent, and is used to observe the descending distance of the liquid level in the vertical liquid cavity in the hard bottle body;

[0012] Before the puncture needle is connected to the hard bottle body, liquid medicine is injected into the hard bottle body, and the liquid medicine compresses the gas medium in the hard bottle body; after the puncture needle is connected to the hard bottle body, the compressed gas medium provides at least part of the power for the flow of the liquid medicine.

[0013] In an optional embodiment, the hard bottle body and the puncture needle are connected to each other via a connecting component.

[0014] In an optional embodiment, the connecting component includes a first connecting end and a second connecting end, the first connecting end is connected to the needle seat of the puncture needle, and the first connecting end is an outer conical joint.

[0015] In an optional embodiment, the second connecting end is connected to a steel needle, and the steel needle passes through or is pulled out of the sealing member.

[0016] In an optional embodiment, a sealing cutout is provided on the sealing member, the second connecting end is an outer conical joint, and the second connecting end passes through or is pulled out of the sealing member through the sealing cutout.

[0017] In an optional embodiment, a sealing member is disposed at the second end of the hard bottle body, and the first end of the hard bottle body is connected to the needle seat of the puncture needle.

[0018] In an optional embodiment, a plunger is provided in the plunger cavity between the first end of the hard bottle body and the vertical liquid cavity, and a liquid channel is provided on the plunger;

[0019] The first end of the hard bottle body and the vertical liquid chamber can be opened or closed by rotating the rotary handle at the end of the plunger.

[0020] On the other hand, the present invention further provides a puncture system, comprising the puncture indication device as described above.

[0021] On the other hand, the present invention also provides a method for using the puncture indication device as described above, comprising:

[0022] S1: injecting the liquid medicine into the hard bottle through the sealing member, so that the liquid medicine compresses the gas medium in the hard bottle;

[0023] S2: First, insert the puncture needle into the human body, then connect the hard bottle body and the puncture needle, and then continue puncturing;

[0024] S3: When the puncture needle passes through the yellow ligament of the human body and enters the epidural space, the liquid level in the vertical liquid cavity of the hard bottle body drops significantly under the pressure of the gas medium compressed in the hard bottle body.

[0025] In an optional embodiment, a vertical liquid cavity marking line is provided on the outer surface of the hard bottle body; and the pressure in the epidural space is calculated by the drop distance of the liquid level in the vertical liquid cavity of the hard bottle body.

[0026] The beneficial effects of the present invention are:

[0027] A drug solution (normal saline) is pre-injected into a sealed, at least partially transparent hard bottle body, and the drug solution squeezes the gas medium in the hard bottle body to compress it; the puncture needle is first inserted into the human body, and then the hard bottle body and the puncture needle are connected, and then the puncture is continued; when the puncture needle passes through the yellow ligament of the human body (enters the epidural space), the liquid level of the drug solution in the hard bottle body will drop significantly under the action of the pressure of the compressed gas medium in the bottle, regardless of whether the epidural space is under negative pressure or a weak positive pressure lower than the tissue pressure.

[0028] It should be noted that, since the epidural space may be under negative pressure or a weak positive pressure lower than the tissue pressure, when the puncture needle passes through the yellow ligament and enters the epidural space and the epidural space is under a weak positive pressure lower than the tissue pressure, the liquid level of the medicine in the hard bottle will drop significantly under the pressure of the compressed gas medium; if it is under negative pressure, the drop in the liquid level will be more obvious; based on the drop in the liquid level of the medicine in the hard bottle, it can be accurately determined whether the puncture needle has entered the epidural space. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The overall structure of the puncture indication device provided by one embodiment of the present invention is schematically shown in FIG. Figure 1 .

[0031] Figure 2 The overall structure of the puncture indication device provided by one embodiment of the present invention is schematically shown in FIG. Figure 2 .

[0032] Figure 3 The overall structure of the puncture indication device provided by one embodiment of the present invention is schematically shown in FIG. Figure 3 .

[0033] Figure 4 A schematic cross-sectional view of a plunger provided in one embodiment of the present invention.

[0034] Figure 5 A schematic diagram of an open state of a plunger provided in one embodiment of the present invention.

[0035] Figure 6 A schematic diagram of a closed state of a plunger provided in one embodiment of the present invention.

[0036] Among them, the accompanying drawings are marked as follows:

[0037] 1-puncture needle, 11-needle seat; 2-connecting component, 21-first connecting end, 22-second connecting end, 23-steel needle; 3-hard bottle body, 31-seal, 311-seal incision, 32-vertical liquid cavity, 321-vertical liquid cavity marking line, 33-plunger cavity, 34-plunger, 341-liquid channel, 342-rotating handle, 35-first end, 36-second end. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly specifying the number of technical features. "Multiple" means two or more, and "several" means any number including one, unless otherwise clearly and specifically defined.

[0040] Embodiment 1

[0041] Please refer to the attached Figure 1The purpose of this embodiment is to provide an epidural space puncture indication device, comprising: a puncture needle 1 and a hard bottle body 3 that can be connected to each other, and the outer surface of the hard bottle body 3 is provided with a vertical liquid cavity marking line 321; wherein, at least one end of the hard bottle body 3 is provided with a sealing member 31, and the sealing member 31 can maintain the sealing state of the hard bottle body 3 before and after the injection of the liquid medicine; the hard bottle body 3 is at least partially transparent, and is used to observe the descending distance of the liquid level in the vertical liquid cavity 32 in the hard bottle body 3; before the puncture needle 1 is connected to the hard bottle body 3, the liquid medicine is injected into the hard bottle body 3, and the liquid medicine compresses the gas medium in the hard bottle body 3; firstly, the puncture needle 1 is inserted into the human body, and then the hard bottle body 3 and the puncture needle 1 are connected, and then the puncture is continued, and at this time, the compressed gas medium provides at least part of the power for the flow of the liquid medicine.

[0042] In this embodiment, the puncture needle 1 and the hard bottle body 3 are connected to each other through the connecting component 2. The connecting component 2 includes a first connecting end 21 and a second connecting end 22. The first connecting end 21 is connected to the needle seat 11 of the puncture needle 1, and the first connecting end 21 is an outer conical joint. The second connecting end 22 is connected to the steel needle 23, and the steel needle 23 passes through or is pulled out of the sealing member 31.

[0043] When in use, the liquid medicine is injected into the hard bottle body 3 through the sealing member 31, and the liquid medicine compresses the gas medium in the hard bottle body 3; first, the puncture needle 1 is connected through the first connecting end 21 of the connecting component 2, and the second connecting end 22 is connected to the steel needle 23. After the puncture needle 1 pierces the human body, the hard bottle body 3 and the steel needle 23 are connected, and the steel needle 23 passes through the sealing member 31 and enters the hard bottle body 3, and then continues to puncture; when the puncture needle 1 passes through the yellow ligament of the human body and enters the epidural space, the liquid level in the vertical liquid cavity 32 of the hard bottle body 3 drops significantly under the pressure of the compressed gas medium in the hard bottle body 3. Finally, the pressure in the epidural space is calculated by the drop distance of the liquid level in the vertical liquid cavity 32 of the hard bottle body 3.

[0044] Embodiment 2

[0045] Please refer to the attached Figure 2 The purpose of this embodiment is to provide an epidural space puncture indication device, comprising: a puncture needle 1 and a hard bottle body 3 that can be connected to each other, and the outer surface of the hard bottle body 3 is provided with a vertical liquid cavity marking line 321; wherein, at least one end of the hard bottle body 3 is provided with a sealing member 31, and the sealing member 31 can maintain the sealing state of the hard bottle body 3 before and after the injection of the liquid medicine; the hard bottle body 3 is at least partially transparent, and is used to observe the descending distance of the liquid level in the vertical liquid cavity 32 in the hard bottle body 3; before the puncture needle 1 is connected to the hard bottle body 3, the liquid medicine is injected into the hard bottle body 3, and the liquid medicine compresses the gas medium in the hard bottle body 3; the puncture needle 1 is first inserted into the human body, and then the hard bottle body 3 and the puncture needle 1 are connected, and then the puncture is continued, and the compressed gas medium provides at least part of the power for the flow of the liquid medicine.

[0046] In this embodiment, the puncture needle 1 and the hard bottle body 3 are connected to each other through the connecting component 2. The connecting component 2 includes a first connecting end 21 and a second connecting end 22. The first connecting end 21 is connected to the needle seat 11 of the puncture needle 1, and the first connecting end 21 is an outer conical joint. A sealing cutout 311 is provided on the sealing member 31, and the second connecting end 22 is also an outer conical joint, and the second connecting end 22 passes through or is pulled out of the sealing member 31 through the sealing cutout 311.

[0047] When in use, the liquid medicine is injected into the hard bottle body 3 through the sealing member 31, and the liquid medicine compresses the gas medium in the hard bottle body 3; first, the puncture needle 1 is connected through the first connecting end 21 of the connecting member 2, and after the puncture needle 1 pierces the human body, the second connecting end 22 of the connecting member 2 passes through the sealing member incision 311 of the sealing member 31 and enters the hard bottle body 3, and then continues to puncture; when the puncture needle 1 passes through the yellow ligament of the human body and enters the epidural space, the liquid level in the vertical liquid cavity 32 of the hard bottle body 3 drops significantly under the pressure of the compressed gas medium in the hard bottle body 3. Finally, the pressure in the epidural space is calculated by the drop distance of the liquid level in the vertical liquid cavity 32 of the hard bottle body 3.

[0048] Embodiment 3

[0049] Please refer to the attached Figure 3-6 The purpose of this embodiment is to provide an epidural space puncture indication device, comprising: a puncture needle 1 and a hard bottle body 3 that can be connected to each other, and the outer surface of the hard bottle body 3 is provided with a vertical liquid cavity marking line 321; wherein, at least one end of the hard bottle body 3 is provided with a sealing member 31, and the sealing member 31 can maintain the sealing state of the hard bottle body 3 before and after the injection of the liquid medicine; the hard bottle body 3 is at least partially transparent, and is used to observe the descending distance of the liquid level in the vertical liquid cavity 32 in the hard bottle body 3; before the puncture needle 1 is connected to the hard bottle body 3, the liquid medicine is injected into the hard bottle body 3, and the liquid medicine compresses the gas medium in the hard bottle body 3; after the puncture needle 1 is inserted into the human body, the puncture needle 1 and the hard bottle body 3 are connected, and the puncture is continued, and the compressed gas medium provides at least part of the power for the flow of the liquid medicine.

[0050] In this embodiment, a sealing member 31 is provided at the second end 36 of the hard bottle body 3, and the first end 35 of the hard bottle body 3 is connected to the needle seat 11 of the puncture needle 1. A plunger 34 is provided in the plunger cavity 33 between the first end 35 of the hard bottle body 3 and the vertical liquid cavity 32, and a liquid channel 341 is provided on the plunger 34; the first end 35 of the hard bottle body 3 and the vertical liquid cavity 32 can be opened or closed by rotating a rotating handle 342 at the end of the plunger 34.

[0051] When in use, firstly, the plunger 34 is in a closed state, and the liquid medicine is injected into the hard bottle body 3 through the sealing member 31, and the liquid medicine compresses the gas medium in the hard bottle body 3; firstly, the puncture needle 1 is inserted into the human body, and then the needle seat 11 of the puncture needle 1 is connected through the first end 35; then the plunger 34 is in an open state by rotating the rotating handle 342 at the end of the plunger 34, and then the puncture needle 1 continues to puncture; when the puncture needle 1 passes through the yellow ligament of the human body and enters the epidural space, the liquid level in the vertical liquid cavity 32 of the hard bottle body 3 drops significantly under the pressure of the compressed gas medium in the hard bottle body 3. Finally, the pressure in the epidural space is calculated by the drop distance of the liquid level in the vertical liquid cavity 32 of the hard bottle body 3.

[0052] Embodiment 4

[0053] The purpose of this embodiment is to provide a puncture system, including the epidural space puncture indication device in the above embodiment.

[0054] A liquid medicine (normal saline) is pre-injected into a sealed at least partially transparent hard bottle body 3, and the liquid medicine squeezes the gas medium in the hard bottle body 3 to compress it; first, the puncture needle 1 is inserted into the human body, and then the hard bottle body 3 and the puncture needle 1 are connected, and then the puncture is continued; when the puncture needle 1 passes through the yellow ligament of the human body (enters the epidural space), the liquid level of the liquid medicine in the hard bottle body 3 will drop significantly under the action of the pressure of the compressed gas medium in the bottle, regardless of whether the epidural space is under negative pressure or a weak positive pressure lower than the tissue pressure.

[0055] It should be noted that, since the epidural space may be under negative pressure or a weak positive pressure lower than the tissue pressure, when the puncture needle 1 passes through the yellow ligament and enters the epidural space, and the epidural space is under a weak positive pressure lower than the tissue pressure, the liquid level of the medicine in the hard bottle 3 will drop significantly under the pressure of the compressed gas medium; if it is under negative pressure, the drop in the liquid level will be more obvious; based on the drop in the liquid level of the medicine in the hard bottle 3, it can be accurately judged whether the puncture needle 1 has entered the epidural space.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A puncture indication device, comprising: A puncture needle (1) and a hard bottle body (3) that can be connected to each other; wherein at least one end of the hard bottle body (3) is provided with a sealing member (31), and the sealing member (31) can maintain the sealing state of the hard bottle body (3) before and after the injection of the liquid medicine; The hard bottle body (3) is at least partially transparent and is used to observe the descending distance of the liquid level in the vertical liquid cavity (32) in the hard bottle body (3); It is characterized in that before the puncture needle (1) is connected to the hard bottle body (3), liquid medicine is injected into the hard bottle body (3), and the liquid medicine compresses the gas medium in the hard bottle body (3); after the puncture needle (1) is connected to the hard bottle body (3), the compressed gas medium provides at least part of the power for the flow of the liquid medicine.

2. The puncture indication device according to claim 1, characterized in that: The hard bottle body (3) and the puncture needle (1) are connected to each other via a connecting component (2).

3. The puncture indication device according to claim 2, characterized in that: The connecting component (2) comprises a first connecting end (21) and a second connecting end (22), wherein the first connecting end (21) is connected to the needle seat (11) of the puncture needle (1), and the first connecting end (21) is an outer conical joint.

4. The puncture indication device according to claim 3, characterized in that: The second connecting end (22) is connected to a steel needle (23), and the steel needle (23) passes through or is pulled out of the sealing member (31).

5. The puncture indication device according to claim 3, characterized in that: The sealing member (31) is provided with a sealing member cutout (311), the second connecting end (22) is an external conical joint, and the second connecting end (22) passes through or is pulled out of the sealing member (31) through the sealing member cutout (311).

6. The puncture indication device according to claim 1, characterized in that: The second end (36) of the hard bottle body (3) is provided with a sealing member (31), and the first end (35) of the hard bottle body (3) is connected to the needle seat (11) of the puncture needle (1).

7. The puncture indication device according to claim 6, characterized in that: A plunger (34) is provided in the plunger cavity (33) between the first end (35) of the hard bottle body (3) and the vertical liquid cavity (32), and a liquid channel (341) is provided on the plunger (34); The first end (35) of the hard bottle body (3) and the vertical liquid chamber (32) can be opened or closed by rotating the rotary handle (342) at the end of the plunger (34).

8. A puncture system, characterized in that: It comprises a puncture indication device as described in any one of claims 1 to 7.

9. A method for using the puncture indication device according to any one of claims 1 to 7, characterized in that: include: S1: injecting the liquid medicine into the hard bottle body (3) through the sealing member (31), so that the liquid medicine compresses the gas medium in the hard bottle body (3); S2: First, the puncture needle (1) is inserted into the human body, and then the hard bottle (3) and the puncture needle (1) are connected, and then the puncture is continued; S3: When the puncture needle (1) passes through the yellow ligament of the human body and enters the epidural space, the liquid level in the vertical liquid cavity (32) of the hard bottle body (3) decreases significantly under the action of the pressure of the gas medium compressed in the hard bottle body (3).

10. The method of use according to claim 9, characterized in that: The outer surface of the hard bottle body (3) is provided with a vertical liquid cavity marking line (321); the pressure in the epidural cavity is calculated by the drop distance of the liquid level in the vertical liquid cavity (32) of the hard bottle body (3).

Images