Buffering three-way pipe with pressure monitoring device

Abstract

The invention relates to the technical field of medical three-way pipes, in particular to a buffering three-way pipe with a pressure monitoring device, which comprises a hose, a liquid outlet end of the hose is provided with a liquid outlet head, and a liquid inlet end of the hose is provided with a first liquid inlet head and a second liquid inlet head; a pressure sensor communicated with the interior of the hose is arranged on the hose; the hose is provided with a buffer joint for controlling the liquid flow pressure; in the switching process of the two solutions, when the pressure rises instantly, a pushing force is also generated on a column body, the column body retracts when overcoming the pre-tightening force of a spring, so that the internal space of a flowing channel is expanded immediately, the purpose is to absorb part of pressure change through expansion of a containing cavity, pressure fluctuation can be relieved or relieved easily, and the stability of the solution is improved. Therefore, the peak value of liquid pressure is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical three-way tubes, and specifically relates to a buffer three-way tube with a pressure monitoring device. Background Art

[0002] In the medical field, it is necessary to connect a three-way tube to a high-pressure syringe. This high-pressure syringe is filled with two cylinders of different solutions. One cylinder contains a contrast agent for injection, and the other cylinder contains normal saline. The two ends of the three-way tube are respectively connected to the two cylinders of solutions of the high-pressure syringe, and one end of the three-way tube is connected to the patient access. In clinical practice, the contrast agent is injected first, and then normal saline is injected. When switching from the contrast agent to normal saline, due to the change in liquid viscosity, a pressure bulge peak appears, and the instantaneous pressure increases. This will cause the contrast agent-saline mixture to break through the blood vessel wall, especially causing extravasation in the elderly, children, and parts with fragile blood vessel walls.

[0003] As Figure 7 shown, when the bolus injection rates of the contrast agent and normal saline are 4 mL / s, the pressure-time curve shows a "double-peak" pattern. The first peak is the gadolinium contrast bolus peak (indicated by the red arrow), and the second peak is the gadolinium contrast agent-saline mixture peak (indicated by the green arrow).

[0004] When the injection plan of the observation group boluses the contrast agent in the first stage, the blood vessel pressure rises rapidly. Taking a 75-kg patient as an example, in the first-stage bolus dose of 15 mL, at a bolus rate of 4 mL / s, the pressure can reach a peak of 88 (PSI) within 4 seconds. At this time, the pressure has not reached the cut-off upper limit of 325 (PSI), indicating that the bolus injection proceeds smoothly and the patient has no risk of extravasation. As the first-stage contrast agent bolus injection is completed, the bolus push of normal saline is replaced in the T-shaped connecting tube, and the contrast agent concentration in the sleeve decreases, and the viscous force decreases, and the pressure climbs instantaneously again (as shown by the green arrow in the figure). The principle of hydrodynamics shows that when a liquid flows in a circular tube, the flow velocity at the center of the tube is the largest, and the flow velocity is smaller the closer it is to the tube wall. Therefore, the gadolinium contrast agent-saline mixture directly causes the non-uniformity of the liquid homogeneity in the lumen, and the pressure climbs to 104 (PSI). At the same time, the T-shaped connecting tube is mostly a curved and winding structure, which makes it easier to place the lower-concentration normal saline in the center of the lumen, and the pressure will be concentrated at the center point. At this time, the instantaneous change in blood vessel pressure in the patient after the bolus injection may become the direct cause of breaking through the blood vessel wall and causing extravasation. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to propose a buffer three-way tube with a pressure monitoring device to solve the technical problem that when switching from the contrast agent of the high-pressure syringe to normal saline, a pressure bulge peak appears due to the change in liquid viscosity and the instantaneous pressure increases.

[0006] For the above purposes, the present invention provides a buffer three-way pipe with a pressure monitoring device, including a hose. The liquid outlet end of the hose is provided with a liquid outlet head, and the liquid inlet end of the hose is provided with a first liquid inlet head and a second liquid inlet head; A pressure sensor communicating with the inside of the hose is provided on the hose; A buffer joint for controlling the liquid flow pressure is provided on the hose.

[0007] Preferably, the buffer joint includes a first joint pipe and a second joint pipe. The first joint pipe and the second joint pipe are communicated with each other, and the mutually communicated inside is a flow-through channel; A pressure stabilizing pipe, a liquid outlet pipe and a detection pipe are provided on the first joint pipe, and a pressure relief component is arranged inside the pressure stabilizing pipe; A first liquid inlet pipe and a second liquid inlet pipe are provided on the second joint pipe. The first liquid inlet head and the second liquid inlet head are respectively connected to the first liquid inlet pipe and the second liquid inlet pipe.

[0008] Preferably, a connecting pipe is provided at the detection pipe, and the end of the connecting pipe is connected to the detection end of the pressure sensor.

[0009] Preferably, the liquid outlet pipe of the first joint is sleeved on the liquid inlet end of the hose and fixedly connected thereto. A silica gel one-way valve is arranged inside the liquid outlet pipe, and the opening of the silica gel one-way valve faces the direction of the hose discharge head.

[0010] Preferably, a sealing ring is arranged inside the liquid outlet pipe, and both sides of the sealing ring are respectively in contact with the silica gel one-way valve and the end of the hose.

[0011] Preferably, the pressure relief component includes a column body. One end of the column body is in a spherical structure, and a limiting piece is arranged at the other end of the column body; An annular boss is formed on the inner wall of one end of the pressure stabilizing pipe communicating with the flow-through channel. The column body penetrates through the annular boss, and the spherical structure end faces the flow-through channel. The limiting piece is inside the pressure stabilizing pipe, and the outer diameter of the limiting piece is larger than the inner diameter of the annular boss; A rubber ring is arranged on the inner wall of the annular boss and is slidably and sealingly connected with the outer wall of the column body; A spring is arranged inside the pressure stabilizing pipe for pushing the limiting piece to make the column body extend into the flow-through channel.

[0012] Preferably, the pressure relief component further includes a screwing piece and a sleeve arranged on one side of the screwing piece. The sleeve is threadedly connected with the inner wall of the pressure stabilizing pipe; One end of the spring is connected to the limiting piece, and the other end of the spring is connected to the screwing piece.

[0013] Preferably, a heating pipe and a micro solenoid valve are sequentially arranged between the hose and the liquid outlet head.

[0014] Preferably, the heating pipeline includes an inner pipe body, which is made of metal. The two ends of the inner pipe are respectively connected to the liquid outlet of the hose and one end of the micro solenoid valve. A heating tape is laid on the outer wall of the heating pipeline, and a heat insulation layer is also sleeved outside the heating pipeline. The heating pipeline is also provided with a temperature sensor probe, which sequentially penetrates through the heating layer and the inner pipeline, and the detection part of the temperature sensor probe is inside the inner pipeline.

[0015] Preferably, the heating tape is arranged in a straight-laying manner and fixed to the outer wall of the inner pipeline by straps.

[0016] Advantages of the present invention: In the present invention, when the pressure will instantaneously increase during the switching process between the two solutions, a driving force will also be generated on the column body. The column body retracts by overcoming the pre-tightening force of the spring, causing the internal space of the flow-through channel to expand immediately. The purpose is to absorb part of the pressure change through the expansion of the cavity, which helps to slow down or relieve the pressure fluctuation, thereby reducing the peak value of the liquid pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is an internal structure schematic diagram of the present invention; Figure 4 For Figure 3 the enlarged view at A of Figure 5 It is a three-dimensional structure schematic Figure 2 ; Figure 6 It is a three-dimensional exploded structure schematic diagram of the heating pipeline of the present invention; Figure 7 It is a dynamic curve graph of the injection pressure of gadolinium contrast agent bolus.

[0019] The reference numerals in the figure are: 1 - Hose; 2 - Liquid outlet head; 3 - First liquid inlet head; 4 - Second liquid inlet head; 5 - Pressure sensor; 51 - Connecting pipe; 6 - Buffer joint; 61 - First joint pipe; 611 - Pressure stabilizing pipe; 6111 - Annular boss; 612 - Liquid outlet pipe; 6121 - Silicone one - way valve; 6122 - Sealing ring; 613 - Detection pipe; 62 - Second joint pipe; 621 - First liquid inlet pipe; 622 - Second liquid inlet pipe; 7 - Pressure relief component; 71 - Cylinder; 72 - Limiting piece; 73 - Spring; 74 - Screwing piece; 75 - Sleeve; 8 - Heating pipeline; 81 - Inner pipeline; 82 - Heating tape; 83 - Heat insulation layer; 84 - Temperature sensor probe; 9 - Micro - solenoid valve. Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in combination with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly. Embodiment

[0022] The present invention proposes a buffer three - way pipe with a pressure monitoring device, as Figures 1 to 4 shown, including a hose 1. The liquid outlet end of the hose 1 is provided with a liquid outlet head 2, and the liquid inlet end of the hose 1 is provided with a first liquid inlet head 3 and a second liquid inlet head 4; A pressure sensor 5 communicating with its interior is provided on the hose 1; A buffer joint 6 for controlling the liquid flow pressure is provided on the hose 1.

[0023] The buffer joint 6 includes a first joint pipe 61 and a second joint pipe 62. The first joint pipe 61 and the second joint pipe 62 are in communication, and the mutually - communicating interior is a flow - through channel; The first joint pipe 61 is provided with a pressure stabilizing pipe 611, a liquid outlet pipe 612 and a detection pipe 613, and a pressure relief component 7 is arranged inside the pressure stabilizing pipe 611; A first liquid inlet pipe 621 and a second liquid inlet pipe 622 are arranged on the second joint pipe 62, and a first liquid inlet head 3 and a second liquid inlet head 4 are respectively connected to the first liquid inlet pipe 621 and the second liquid inlet pipe 622.

[0024] A connecting pipe 51 is arranged at the detection pipe 613, and the end of the connecting pipe 51 is connected to the detection end of the pressure sensor 5.

[0025] The liquid outlet pipe 612 of the first joint is sleeved on the liquid inlet end of the hose 1 and fixedly connected thereto. A silica gel one-way valve 6121 is arranged inside the liquid outlet pipe 612, and the opening of the silica gel one-way valve 6121 faces the direction of the discharge head of the hose 1.

[0026] A sealing ring 6122 is arranged inside the liquid outlet pipe 612, and both sides of the sealing ring 6122 are respectively in contact with the silica gel one-way valve 6121 and the end of the hose 1.

[0027] The pressure relief assembly 7 includes a cylinder body 71, one end of the cylinder body 71 is in a spherical structure, and a limiting piece 72 is arranged at the other end of the cylinder body 71; An annular boss 6111 is formed on the inner wall of one end of the voltage stabilizing pipe 611 communicating with the flow-through channel. The cylinder body 71 penetrates through the annular boss 6111, and the spherical structure end faces the flow-through channel. The limiting piece 72 is inside the voltage stabilizing pipe 611, and the outer diameter of the limiting piece 72 is larger than the inner diameter of the annular boss 6111; A rubber ring is arranged on the inner wall of the annular boss 6111 and is slidably and sealingly connected to the outer wall of the cylinder body 71; A spring 73 is arranged inside the voltage stabilizing pipe 611 for pushing the limiting piece 72 to make the cylinder body 71 extend into the flow-through channel.

[0028] The pressure relief assembly 7 further includes a screwing piece 74 and a sleeve 75 arranged on one side of the screwing piece 74. The sleeve 75 is threadedly connected to the inner wall of the voltage stabilizing pipe 611; One end of the spring 73 is connected to the limiting piece 72, and the other end of the spring 73 is connected to the screwing piece 74.

[0029] In this embodiment, it is necessary to connect the buffer three-way pipe to a high-pressure syringe. This high-pressure syringe is filled with two cylinders of different solutions, one cylinder is for injecting contrast agent and the other cylinder is for normal saline. This high-pressure syringe is a mature existing device, so it will not be elaborated here. The first liquid inlet head 3 and the second liquid inlet head 4 at the liquid inlet end of the hose 1 of the buffer three-way pipe are respectively communicated with the two cylinders of solutions of the high-pressure syringe, and the liquid outlet end of the hose 1 is connected to the patient access through the liquid outlet head 2; In clinical practice, the contrast agent is injected first, and then the normal saline is injected. When switching from the contrast agent to the normal saline, due to the change in liquid viscosity, a pressure bulge peak appears and the pressure rises instantaneously; Since both solutions need to pass through the flow channel formed by the first connecting pipe 61 and the second connecting pipe 62, and the spherical surface of the cylinder 71 is also within the flow channel, when the pressure surges instantaneously during the switching of the two solutions, a driving force will also be generated on the cylinder 71. The cylinder 71 retracts by overcoming the pre-tightening force of the spring 73, causing the internal space of the flow channel to expand immediately. Its purpose is to absorb part of the pressure change through the expansion of the cavity, which helps to slow down or relieve the pressure fluctuation, thereby reducing the peak value of the liquid pressure; During this process, the pressure sensor 5 connected to the connecting pipe 51 can be used to detect the pressure of the solution in the flow channel, so as to judge the stability of the solution pressure. If the pressure generated by the solution still surges, the screwing piece 74 can be rotated to reduce the compressed state of the spring 73. The elastic force of the spring 73 is determined by its degree of compression or stretching. Reducing the compression amount will reduce the elastic force generated by the spring 73 when it is compressed within the same distance. Therefore, the retraction distance and retraction speed of the cylinder 71 when the solution pressure surges can be increased, thereby reducing the surge of the liquid pressure.

[0030] Embodiment 2, as Figure 5 and Figure 6 A heating pipe 8 and a micro solenoid valve 9 are sequentially arranged between the hose 1 and the liquid outlet head 2; The heating pipe 8 includes an inner pipe body, the inner pipe body is made of metal material, and both ends of the inner pipe are respectively connected to the liquid outlet of the hose 1 and one end of the micro solenoid valve 9. A heating tape 82 is laid on the outer wall of the heating pipe 8, and a heat insulation layer 83 is also sleeved outside the heating pipe. The heat insulation layer 83 can be made of rock wool, polyurethane foam or rubber insulation layer, etc., but not limited thereto; The heating pipe 8 is also provided with a temperature sensor probe 84. The temperature sensor probe 84 sequentially penetrates through the heating layer and the inner pipe 81, and the detection part of the temperature sensor probe 84 is inside the inner pipe 81.

[0031] The heating tape 82 is arranged in a straight-laying manner and fixed to the outer wall of the inner pipe 81 by straps. The heating tape 82 can also be arranged in an S-shaped laying manner or a winding laying manner, but attention should be paid to the spacing in the winding laying manner.

[0032] In this example, in order to ensure that the solution injected into the patient's body maintains a body temperature of 37 degrees Celsius so that the pharmacological properties can be most stable, the liquid temperature is controlled by setting a heating pipe 8 at the liquid outlet of the hose 1. The solution flowing through the inner pipe is heated by the heating belt 82. The heating of the solution inside the inner pipe 81 depends on two factors. The length of the inner pipe 81 and the power of the heating belt 82 cooperate with each other to reach the temperature at which the temperature sensor probe 84 finally set at the liquid outlet of the inner pipe 81 detects that the solution conforms to 37 degrees Celsius. Both the pressure sensor 5 and the temperature sensor probe 84 are connected to the control computer. When the signal transmitted by the temperature sensor probe 84 indicates that the temperature is less than 37 degrees Celsius, maintenance can be carried out in a timely manner. When the pressure sensor 5 detects that the liquid flow breaks through the pressure peak value or is 20% or 30% higher than the injection pressure in a certain stage, the micro solenoid valve 9 is activated to stop the liquid flow; The default setting of the sensor in the high-pressure syringe is 325 (PSI). The cut-off end of this sensor is located in the operation room. Even if it stops automatically, some mixed liquid will continue to be injected into the lumen with a delay. Therefore, stopping the liquid flow by the micro solenoid valve 9 helps to stop the injection in the first time and minimize the amount of extravasation as much as possible.

[0033] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of brevity, they are not provided in detail.[[ID=~6]]

[0034] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A buffer three-way pipe with a pressure monitoring device, characterized in that, It includes a hose, with a liquid outlet head provided at the liquid outlet end of the hose, and a first liquid inlet head and a second liquid inlet head provided at the liquid inlet end of the hose; A pressure sensor communicating with its interior is provided on the hose; A buffer joint for controlling the liquid flow pressure is provided on the hose.

2. The buffer tee with a pressure monitoring device according to claim 1, wherein The buffer joint includes a first joint pipe and a second joint pipe, the first joint pipe and the second joint pipe are in communication, and the mutually communicating interior is a flow-through channel; A pressure stabilizing pipe, a liquid outlet pipe and a detection pipe are provided on the first joint pipe, and a pressure relief component is arranged inside the pressure stabilizing pipe; A first liquid inlet pipe and a second liquid inlet pipe are provided on the second joint pipe, and the first liquid inlet head and the second liquid inlet head are respectively connected to the first liquid inlet pipe and the second liquid inlet pipe.

3. The buffer tee with a pressure monitoring device according to claim 2, characterized in that, A connecting pipe is provided at the detection pipe, and the end of the connecting pipe is connected to the detection end of the pressure sensor.

4. The buffer tee with a pressure monitoring device according to claim 2, characterized in that, The liquid outlet pipe of the first joint is sleeved on the liquid inlet end of the hose and fixedly connected thereto, and a silica gel one-way valve is arranged inside the liquid outlet pipe, and the opening of the silica gel one-way valve faces the direction of the hose discharge head.

5. The buffer tee with a pressure monitoring device according to claim 4, characterized in that, A sealing ring is arranged inside the liquid outlet pipe, and both sides of the sealing ring are respectively in contact with the silica gel one-way valve and the hose end.

6. The buffer tee with a pressure monitoring device according to claim 2, characterized in that, The pressure relief component includes a cylinder, one end of the cylinder is in a spherical structure, and a limiting piece is arranged at the other end of the cylinder; An annular boss is formed on the inner wall of one end of the pressure stabilizing pipe communicating with the flow-through channel, the cylinder penetrates through the annular boss, and the spherical structure end faces the flow-through channel, the limiting piece is inside the pressure stabilizing pipe, and the outer diameter of the limiting piece is larger than the inner diameter of the annular boss; a rubber ring is arranged on the inner wall of the annular boss and is in sliding seal connection with the outer wall of the cylinder; A spring is arranged inside the pressure stabilizing pipe for pushing the limiting piece to make the cylinder extend into the flow-through channel.

7. The buffer tee with a pressure monitoring device according to claim 6, characterized in that, The pressure relief component further includes a screwing piece and a sleeve arranged on one side of the screwing piece, and the sleeve is in threaded connection with the inner wall of the pressure stabilizing pipe; One end of the spring is connected to the limiting piece, and the other end of the spring is connected to the screwing piece.

8. The buffer tee with a pressure monitoring device according to claim 1, characterized in that, A heating pipeline and a micro solenoid valve are sequentially arranged between the hose and the liquid outlet head.

9. The buffer tee with a pressure monitoring device according to claim 8, characterized in that, The heating pipeline includes an inner pipe body, the inner pipe body is made of metal material, and both ends of the inner pipe are respectively connected to the liquid outlet of the hose and one end of the micro solenoid valve. A heating tape is laid on the outer wall of the heating pipeline, and a heat insulation layer is further sleeved outside the heating pipeline. The heating pipeline is also provided with a temperature sensor probe, the temperature sensor probe sequentially penetrates through the heating layer and the inner pipeline, and the detection part of the temperature sensor probe is inside the inner pipeline.

10. The buffer tee with a pressure monitoring device according to claim 9, characterized in that, The heating tape is arranged in a straight laying manner and fixed to the outer wall of the inner pipeline by a binding band.

Images