Double-cavity indwelling needle for drug-loaded myocardial perfusion examination

Abstract

The invention provides a double-cavity indwelling needle for drug-loaded myocardial perfusion examination, and belongs to the field of medical instruments. Comprising a heparin cap and a catheter seat arranged on one side of the heparin cap, and a branch pipe is fixedly connected to a liquid inlet of the catheter seat; the connecting sleeve is fixedly connected to the end opening of the heparin cap, a connecting pipe is fixedly connected to the end opening of the connecting sleeve, and one end of the connecting pipe is fixedly connected with the branch pipe. Through cooperation of parts such as a threaded sleeve, after a worker punctures a rubber block and injects a medicament into the threaded sleeve, the medicament can flow into a circulating pipe through a second flow guide hole and a first guide hole, and a second soft film is burst open, so that the medicament flows into the body of a patient; therefore, a developer and adenosine injection can be injected into the device at the same time, a worker does not need to conduct needle insertion operation on a patient for many times, pain caused by repeated puncture of the patient is avoided, and the overall practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more particularly to a double-lumen indwelling needle for drug-loaded myocardial perfusion examination. Background Art

[0002] When doing a myocardial drug stress test, adenosine injection needs to be continuously pumped, and the contrast agent needs to be injected halfway through the pumping. The standard practice is to insert a needle in each hand, one to pump the drug and the other to inject the contrast agent, but it will be painful for the patient, and sometimes if the patient's vascular condition is not good, several needles will be required, which is difficult for the patient to accept.

[0003] Currently, when acupuncture is performed on one hand, the clinically used indwelling needle has only one channel. This will result in a transient overdose of adenosine and the occupation of the same channel by the contrast agent when pumping adenosine. As a result, the adenosine injection cannot be continuously pumped in a short period of time. For this reason, we provide a double-lumen indwelling needle for drug-loaded myocardial perfusion examination to solve the above problem. Summary of the Invention

[0004] In view of the problem in the prior art that an indwelling needle cannot simultaneously inject a contrast agent and adenosine injection, the present invention aims to provide a double-lumen indwelling needle for drug-loaded myocardial perfusion examination.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A double-lumen indwelling needle for drug-loaded myocardial perfusion examination comprises: a heparin cap and a catheter seat arranged on one side of the heparin cap, with a branch tube fixedly connected to the liquid inlet of the catheter seat; a connecting sleeve, the connecting sleeve is fixedly connected to the port of the heparin cap, the port of the connecting sleeve is fixedly connected to a connecting tube, one end of the connecting tube is fixedly connected to the branch tube; a needle head, the needle head is mounted on the end of the catheter seat, and a puncture needle is fixedly connected to the inner side of the branch tube, and one end of the puncture needle extends to the outside of the catheter seat; a double-lumen injection structure, located on one side of the connecting sleeve and penetrating to the inner side of the catheter seat, for simultaneously injecting two drugs.

[0007] Optionally, the dual-cavity injection structure includes a flow tube fixedly connected to one side of the connecting sleeve, and one end of the flow tube passes through the connecting sleeve and extends to the interior of the catheter seat through the branch pipe. The interior of the catheter seat is fixedly connected to a guide shell, and the liquid inlet of the guide shell is connected to the flow tube. One end of the flow tube is fixedly connected to a fixing cap.

[0008] Optionally, the dual-chamber injection structure also includes a soft sleeve fixedly connected to the liquid outlet of the catheter seat, the inner side of the soft sleeve is fixedly connected to a first soft film, and the first soft film is attached to the outer wall of the puncture needle, a guide groove is provided between the first soft film and the soft sleeve, a guide port communicating with the guide groove is opened inside the guide shell, and a piston assembly is provided inside the fixed cap.

[0009] Optionally, a connecting sleeve is fixedly connected to the bottom of the soft sleeve, a second soft film is fixedly connected to the bottom of the first soft film, and the second soft film is attached to the bottom of the connecting sleeve.

[0010] Optionally, the piston assembly includes a threaded groove, a second straight groove and a first straight groove formed on the inner side of the fixing cap, the inner side of the threaded groove is threadedly connected to a threaded sleeve, the interior of the threaded sleeve is provided with a second guide hole extending to the outside, and the inner side of the threaded groove is provided with a first guide hole communicating with the second straight groove.

[0011] Optionally, a rubber block is fixedly connected to the inner side of the threaded sleeve and is used to block the threaded sleeve from communicating with the outside.

[0012] Optionally, the piston assembly further comprises a fixing ring fixedly connected to the bottom of the threaded sleeve, and a sealing rubber is fixedly connected to the outer side of the fixing ring.

[0013] Optionally, a tapered groove is provided between the first straight groove and the second straight groove, and the sealing rubber is compressed through the tapered groove.

[0014] Optionally, the diameter of the first straight groove is smaller than the diameter of the sealing rubber, and the diameter of the sealing rubber is larger than the diameter of the thread groove.

[0015] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0016] In the above solution, by arranging the threaded sleeve and other parts to cooperate, when the staff punctures the rubber block and injects the medicine into the threaded sleeve, the medicine can flow into the circulation tube through the second guide hole and the first guide hole, and then break the second soft membrane to flow into the patient's body. In this way, the device can simultaneously inject the contrast agent and adenosine injection solution, eliminating the need for the staff to perform multiple needle operations on the patient, thus avoiding the pain caused by repeated punctures. Each puncture may cause infection or blood vessel damage (such as hematoma, phlebitis). A single puncture can reduce the incidence of such complications. It is particularly suitable for patients with long-term infusion or fragile blood vessels, thereby improving the overall practicality of the device.

[0017] By arranging the cooperation of parts such as the second soft membrane, before the medical staff performs puncture, they can rotate the fixing ring at the bottom of the threaded sleeve to the position of the first straight groove by observing the fixing cap. Due to the influence of the sealing rubber seal, suction is generated inside the circulation tube, and then the inside of the guide groove is first sucked, so that negative pressure is generated inside the guide groove, so that the second soft membrane can bulge inward under the action of negative pressure. Therefore, when the puncture needle performs puncture, the pressure in the blood vessel will cause blood to flow rapidly into the guide groove under the action of negative pressure, forming an obvious blood return phenomenon (such as red liquid filling the guide groove), helping medical staff to immediately judge whether the needle has accurately entered the blood vessel and avoid blind puncture. The negative pressure suction makes the blood return signal more sensitive, especially for patients with thinner or less elastic blood vessels (such as elderly patients and children), which can shorten the puncture judgment time and reduce complications such as blood vessel damage and hematoma caused by multiple punctures, thereby improving the accuracy of puncture and further improving the overall practicality of the device.

[0018] By arranging the cooperation of parts such as sealing rubber, when the medical staff completes the injection of the medicine, they can rotate the threaded sleeve again, observe that the sealing rubber moves to the inside of the conical groove, and plug the conical groove, thereby isolating the circulation tube from the outside world, preventing external air, bacteria or pollutants from entering the interior of the indwelling needle and the patient's blood vessels through the circulation tube, and reducing the risk of complications such as phlebitis and bloodstream infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 is a cross-sectional view of the catheter adapter of the present invention;

[0022] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0024] Figure 5 This is a structural schematic diagram of the initial position of the threaded sleeve of the present invention;

[0025] Figure 6 This is a structural schematic diagram of the threaded sleeve of the present invention when it moves to the maximum position;

[0026] Figure 7 This is a schematic diagram of the sealing rubber of the present invention blocking the tapered groove;

[0027] Figure 8 Exploded view of the fixed cap and threaded sleeve of the present application.

[0028] [Reference signs]

[0029] 1. Heparin cap; 2. Connecting sleeve; 3. Connecting tube; 4. Catheter seat; 5. Puncture needle; 6. Fixed cap; 7. Flow tube; 8. Needle; 9. Branch tube; 10. Flow guide shell; 11. Soft sleeve; 12. Flow guide port; 13. First soft film; 14. Flow guide groove; 15. Connecting spacer sleeve; 16. Second soft film; 17. Threaded sleeve; 18. Fixed ring; 19. Sealing rubber; 20. First straight groove; 21. Conical groove; 22. First guide hole; 23. Second straight groove; 24. Second flow guide hole; 25. Threaded groove; 26. Rubber block.

[0030] As shown in the drawings, in order to clearly realize the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application in this specific structure, device and environment, and those skilled in the art can adjust or modify these devices and environment according to specific needs. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to the drawings and specific embodiments. It should be noted here that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be used by those skilled in the art to implement them; and the drawings are only used to describe the embodiments more specifically, and are not intended to specifically limit the present application.

[0032] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes this specific feature, structure or property. In addition, when a specific feature, structure or property is described in combination with an embodiment, it should be within the knowledge of those skilled in the related art to realize this feature, structure or property in combination with other embodiments (whether or not explicitly described).

[0033] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures, or characteristics, in the plural. In addition, the term "based on" can be understood as not necessarily requiring exclusively factors for which it is based on, but instead can allow for existence of other factors not expressly described, at least in part, depending at least in part on the context.

[0034] It is to be understood that the terms "on", "over", and "above" in the present application should be interpreted in the broadest context to mean not only "directly on" something but also to include the meaning of being "on" something with intervening features or layers therebetween, and not only "over" or "above" something but also to include the meaning of being "over" or "above" something with no intervening features or layers therebetween.

[0035] In addition, spatially relative terms, such as "under", "below", "lower", "over", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein can similarly be interpreted accordingly.

[0036] As shown in Figures 1 to 8 The embodiment of the present application provides a double-lumen indwelling needle for drug-loaded myocardial perfusion examination, which comprises a heparin cap 1, a catheter seat 4 arranged on one side of the heparin cap 1, a branch pipe 9 fixedly connected to a liquid inlet of the catheter seat 4, a connecting sleeve 2 fixedly connected to a port of the heparin cap 1, a connecting pipe 3 fixedly connected to the port of the connecting sleeve 2, one end of the connecting pipe 3 fixedly connected to the branch pipe 9, a needle 8 installed at an end of the catheter seat 4, a puncture needle 5 fixedly connected to the inner side of the branch pipe 9, one end of the puncture needle 5 extending to the outside of the catheter seat 4, a double-lumen injection structure arranged on one side of the connecting sleeve 2 and penetrating to the inner side of the catheter seat 4, used for simultaneously injecting two kinds of drugs, the double-lumen injection structure comprising a flow pipe 7 fixedly connected to one side of the connecting sleeve 2, one end of the flow pipe 7 penetrating the connecting sleeve 2 and extending to the inside of the catheter seat 4 through the branch pipe 9, a flow guide shell 10 fixedly connected to the inside of the catheter seat 4, a liquid inlet of the flow guide shell 10 in communication with the flow pipe 7, one end of the flow pipe 7 fixedly connected to a fixed cap 6, the double-lumen injection structure further comprising a soft sleeve 11 fixedly connected to a liquid outlet of the catheter seat 4, the inner side of the soft sleeve 11 fixedly connected to a first soft film 13, the first soft film 13 adhered to the outer wall of the puncture needle 5, a flow guide groove 14 arranged between the first soft film 13 and the soft sleeve 11, a flow guide hole 12 arranged in the inside of the flow guide shell 10 and in communication with the flow guide groove 14, a piston assembly arranged in the inside of the fixed cap 6, a connecting spacer 15 fixedly connected to the bottom of the soft sleeve 11, a second soft film 16 fixedly connected to the bottom of the first soft film 13, and the second soft film 16 adhered to the bottom of the connecting spacer 15.

[0037] First, when an indwelling needle is needed, after the indwelling needle is produced in the production workshop, the bottom of the fixing ring 18 is set at the bottom of the first straight groove 20. Then, when the user needs to use the side circulation tube 7 to inject the developer and adenosine injection at the same time, the staff can first rotate the threaded sleeve 17 so that the first guide hole 22 is aligned with the second guide hole 24. Then, the staff can pierce the rubber block 26 through other parts, and then install the two syringes on the threaded sleeve 17 and the heparin cap 1 respectively (since how the syringe is connected to the heparin cap 1 for injection is a prior art, it is not described in detail in this solution). After the staff punctures the rubber block 26 and injects the medicine into the threaded sleeve 17, it can flow into the circulation tube 7 through the second guide hole 24 and the first guide hole 22, and break the second soft membrane 16 to flow into the patient's body. In this way, the device can simultaneously inject the contrast agent and adenosine injection solution, eliminating the need for the staff to perform multiple needle-piercing operations on the patient, avoiding the pain caused by repeated punctures. Each puncture may cause infection or vascular damage (such as hematoma, phlebitis). A single puncture can reduce the incidence of such complications, which is especially suitable for patients with long-term infusion or fragile blood vessels, thereby improving the overall practicality of the device.

[0038] like Figures 1 to 8 As shown, the piston assembly includes a threaded groove 25, a second straight groove 23 and a first straight groove 20 formed on the inner side of the fixing cap 6. The inner side of the threaded groove 25 is threadedly connected to a threaded sleeve 17. A second guide hole 24 extending to the outside is formed inside the threaded sleeve 17. A first guide hole 22 communicating with the second straight groove 23 is formed on the inner side of the threaded groove 25. A rubber block 26 for blocking the threaded sleeve 17 from communicating with the outside is fixedly connected to the inner side of the threaded sleeve 17. The piston assembly also includes a fixing ring 18 fixedly connected to the bottom of the threaded sleeve 17, and a sealing rubber 19 is fixedly connected to the outer side of the fixing ring 18.

[0039] Furthermore, a tapered groove 21 is provided between the first straight groove 20 and the second straight groove 23 , and the sealing rubber 19 is compressed by the tapered groove 21 . The diameter of the first straight groove 20 is smaller than the diameter of the sealing rubber 19 , and the diameter of the sealing rubber 19 is larger than the diameter of the thread groove 25 .

[0040] The fixing cap 6 is made of a transparent material. First, before the medical staff performs the puncture, they can rotate the fixing ring 18 at the bottom of the threaded sleeve 17 to the notch of the first straight groove 20 by looking at the fixing cap 6. Due to the influence of the sealing rubber 19, suction is generated inside the circulation tube 7, and then the inside of the guide groove 14 is first sucked, thereby generating a negative pressure inside the guide groove 14, so that the second soft membrane 16 can bulge inward under the action of the negative pressure. Therefore, when the puncture needle 5 performs the puncture, the pressure in the blood vessel will cause the blood to flow rapidly into the guide groove 14 under the action of the negative pressure, forming an obvious blood return phenomenon (such as red liquid filling the guide groove), helping the medical staff to immediately determine whether the needle has accurately entered the blood vessel and avoid blind puncture. The negative pressure suction makes the blood return signal more sensitive, especially for patients with thinner or less elastic blood vessels (such as elderly patients and children). It can shorten the puncture judgment time and reduce complications such as blood vessel damage and hematoma caused by multiple punctures, thereby improving the accuracy of puncture and thus improving the overall practicality of the device.

[0041] When it is necessary to inject medicine, the staff can continue to rotate the threaded sleeve 17 to move the sealing rubber 19 toward the inside of the second straight groove 23. When the sealing rubber 19 reaches the notch of the second straight groove 23, the threaded sleeve 17 moves to the maximum position. At this time, the initial diameter of the sealing rubber 19 is smaller than the second straight groove 23, so that after the medicine is injected into the threaded sleeve 17, it can flow into the circulation pipe 7 through the second guide hole 24 and the first guide hole 22.

[0042] After the medical staff has finished injecting the medicine, they can rotate the threaded sleeve 17 again, observe that the sealing rubber 19 moves to the inside of the conical groove 21, and plug the conical groove 21, thereby isolating the circulation tube 7 from the outside world, preventing external air, bacteria or pollutants from entering the interior of the indwelling needle and the patient's blood vessels through the circulation tube 7, and reducing the risk of complications such as phlebitis and bloodstream infection.

[0043] The workflow of the technical solution of the present invention is as follows:

[0044] First, when an indwelling needle is needed, when the indwelling needle is produced in the production workshop, the bottom of the fixing ring 18 is set at the bottom of the first straight groove 20. Then, when the user needs to use the side circulation tube 7 to inject the developer and adenosine injection at the same time, the staff can first rotate the threaded sleeve 17 to make the sealing rubber 19 move toward the inside of the second straight groove 23. When the sealing rubber 19 rests on the notch of the second straight groove 23, the threaded sleeve 17 moves to the maximum position. At this time, the first guide hole 22 is aligned with the second guide hole 24. Then the staff can pierce the threaded groove 25 through other parts, and then install the two syringes on the threaded sleeve 17 and the heparin cap 1 respectively. After the staff pierces the rubber block 26 and injects the medicine into the threaded sleeve 17, it can flow into the circulation tube 7 through the second guide hole 24 and the first guide hole 22, and flush the second soft membrane 16 to flow into the patient's body, so that the device can inject the developer and adenosine injection at the same time, without the need for the staff to perform multiple acupuncture operations on the patient.

[0045] The fixing cap 6 is made of a transparent material. First, before the medical staff performs puncture, they can rotate the fixing ring 18 at the bottom of the threaded sleeve 17 to the notch of the first straight groove 20 by looking at the fixing cap 6. Due to the influence of the sealing rubber 19, suction is generated inside the circulation tube 7, and then the inside of the guide groove 14 is first sucked, so that negative pressure is generated inside the guide groove 14, so that the second soft membrane 16 can bulge inward under the action of the negative pressure. Therefore, when the puncture needle 5 performs puncture, the pressure in the blood vessel will cause the blood to flow rapidly into the guide groove 14 under the action of the negative pressure, forming an obvious blood return phenomenon (such as red liquid filling the guide groove), which helps the medical staff to immediately judge whether the needle has accurately entered the blood vessel and avoid blind puncture. The negative pressure suction makes the blood return signal more sensitive, especially for patients with thinner or less elastic blood vessels (such as elderly patients and children), which can shorten the puncture judgment time and reduce complications such as blood vessel damage and hematoma caused by multiple punctures, thereby improving the accuracy of puncture.

[0046] After the medical staff has finished injecting the medicine, they can rotate the threaded sleeve 17 again and observe that the sealing rubber 19 moves to the inside of the tapered groove 21 to plug the tapered groove 21, thereby isolating the circulation tube 7 from the outside.

[0047] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-lumen indwelling needle for drug stress myocardial perfusion examination, characterized in that: include: A heparin cap and a catheter seat arranged on one side of the heparin cap, wherein a branch tube is fixedly connected to the liquid inlet of the catheter seat; A connecting sleeve, the connecting sleeve being fixedly connected to the port of the heparin cap, a connecting tube being fixedly connected to the port of the connecting sleeve, and one end of the connecting tube being fixedly connected to the branch tube; A needle, the needle being mounted on the end of the catheter seat, and a puncture needle being fixedly connected to the inner side of the branch tube, and one end of the puncture needle extending to the outside of the catheter seat; The dual-lumen injection structure is located on one side of the connecting sleeve and penetrates the inner side of the catheter seat, and is used for injecting two drugs at the same time.

2. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 1, characterized in that: The dual-cavity injection structure includes a flow tube fixedly connected to one side of the connecting sleeve, and one end of the flow tube passes through the connecting sleeve and extends to the interior of the catheter seat through the branch pipe. The interior of the catheter seat is fixedly connected to a guide shell, and the liquid inlet of the guide shell is connected to the flow tube. One end of the flow tube is fixedly connected to a fixing cap.

3. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 2, characterized in that: The dual-chamber injection structure also includes a soft sleeve fixedly connected to the liquid outlet of the catheter seat, a first soft film fixedly connected to the inner side of the soft sleeve, and the first soft film is attached to the outer wall of the puncture needle, a guide groove is provided between the first soft film and the soft sleeve, a guide port communicating with the guide groove is opened inside the guide shell, and a piston assembly is provided inside the fixing cap.

4. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 3, characterized in that: The bottom of the soft sleeve is fixedly connected to a connecting sleeve, the bottom of the first soft film is fixedly connected to a second soft film, and the second soft film is attached to the bottom of the connecting sleeve.

5. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 3, characterized in that: The piston assembly includes a threaded groove, a second straight groove and a first straight groove formed on the inner side of the fixing cap. The inner side of the threaded groove is threadedly connected to a threaded sleeve. A second guide hole extending to the outside is formed inside the threaded sleeve. A first guide hole communicating with the second straight groove is formed inside the threaded groove.

6. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 5, characterized in that: A rubber block is fixedly connected to the inner side of the threaded sleeve and is used to block the threaded sleeve from communicating with the outside.

7. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 6, characterized in that: The piston assembly further comprises a fixing ring fixedly connected to the bottom of the threaded sleeve, and a sealing rubber is fixedly connected to the outer side of the fixing ring.

8. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 7, characterized in that: A tapered groove is provided between the first straight groove and the second straight groove, and the sealing rubber is compressed through the tapered groove.

9. The double-lumen indwelling needle for drug stress myocardial perfusion examination according to claim 8, characterized in that: The diameter of the first straight groove is smaller than the diameter of the sealing rubber, and the diameter of the sealing rubber is larger than the diameter of the thread groove.

Images