Combined artery blood sampling device

Abstract

The utility model relates to a combined type artery blood sampling device which comprises a puncture drainage portion, a blood sampling portion, a blood sampling portion, a blood sampling portion, a blood sampling portion, a blood sampling portion and a blood sampling portion, and the puncture drainage portion comprises an artery indwelling needle and a drainage tube used for draining blood. The collecting part comprises a first needle cylinder which is arranged at the other end of the drainage tube and is used for extracting return blood, and a second needle cylinder which is arranged on the side wall, close to the other end, of the drainage tube and is used for extracting arterial blood; the switching part is arranged on the side wall, close to the other end, of the drainage tube, located between the first needle cylinder and the second needle cylinder and used for switching the passage state of the first needle cylinder and the passage state of the second needle cylinder. According to the utility model, the two needle cylinders with different purposes are combined together, and the passage states between the two needle cylinders and the drainage tube are creatively switched, so that the three steps of extracting return blood, extracting arterial blood and re-injecting the return blood can be completed without repeatedly pulling and inserting the needle cylinders, the steps of collecting the arterial blood for a seriously ill patient are effectively simplified, and the working efficiency is improved. The problems of blood pollution and the like are also avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a combined arterial blood collection device. Background Technology

[0002] In clinical practice, arterial blood gas analysis is a common procedure for clinical diagnosis and emergency treatment of patients. The method of arterial blood gas collection has a significant impact on the results. For critically ill patients, frequent blood gas sampling is required. Therefore, for these patients, the usual method for collecting arterial blood gas is as follows: first, a syringe is inserted into the artery to draw back blood, then a blood gas syringe is connected to draw back arterial blood, and finally the syringe is repositioned and reinjected into the patient. This procedure requires repeatedly removing and repositioning the syringe, increasing the risk of bloodborne infection, and is also cumbersome. Summary of the Invention

[0003] The purpose of this invention is to provide a combined arterial blood collection device to overcome the problems of infection and cumbersome procedures when collecting arterial blood from seriously ill patients for blood gas analysis.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] The technical solution of this utility model is to provide a combined arterial blood collection device, comprising:

[0006] The puncture drainage section includes an indwelling arterial needle and a drainage tube for draining blood, wherein one end of the indwelling arterial needle is connected to the drainage tube;

[0007] The collection unit includes a first syringe located at the other end of the drainage tube for drawing back blood, and a second syringe located on the side wall of the drainage tube near the other end for drawing arterial blood.

[0008] A switching unit is located on the side wall of the drainage tube near the other end and between the first syringe and the second syringe, for switching the passage status of the first syringe and the second syringe.

[0009] In some specific embodiments, the switching unit includes a gear that rotates longitudinally near the side wall of the drainage tube, a rack connected to the gear and moving linearly in a direction perpendicular to the rotation of the gear, a second magnetic strip disposed on the top of the rack and used to close the second syringe passage, a first magnetic strip disposed on the bottom of the side wall of the rack away from the second syringe and used to close the first syringe passage, and a handle with one end connected to the gear and used to rotate the gear, the other end of the handle passing through the side wall of the drainage tube.

[0010] In some specific embodiments, the length of the first magnetic strip is at least the distance from the sidewall connected to the rack to the point covering the connection between the drainage tube and the first syringe.

[0011] In some specific embodiments, the length range of the second magnetic strip satisfies the following conditions: when the gear meshes with the lowest tooth on the rack, the end of the second magnetic strip is higher than the connection between the second syringe and the drainage tube; when the gear meshes with the highest tooth on the rack, the end of the second magnetic strip is lower than the connection between the second syringe and the drainage tube.

[0012] In some specific embodiments, the drainage tube has a slot on its sidewall for the handle to pass through, and the slot sidewall is also provided with a sealing gasket.

[0013] In some specific embodiments, iron plates for attracting and fixing the first magnetic stripe and the second magnetic stripe are respectively provided on the outer wall of the connection between the drainage tube and the first syringe and the second syringe.

[0014] In some specific embodiments, the switching part further includes a fixing plate disposed on the inner wall of the drainage tube and used to support the rack, and a limiting member disposed on the fixing plate and used to surround and limit the rack.

[0015] In some specific embodiments, two limiting members are provided, located at both ends of the rack respectively.

[0016] In some specific embodiments, the other end of the drainage tube is provided with a first interface for connecting the first syringe;

[0017] The drainage tube has a second interface on its side wall for connecting the second syringe.

[0018] In some specific implementations, the second interface is a positive pressure interface.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention combines two syringes for different purposes and creatively switches the flow path between the two syringes and the drainage tube using a switching unit. This allows for the completion of the three steps of drawing back blood, drawing arterial blood, and re-injecting the back blood without repeatedly inserting and removing the syringe. This effectively simplifies the process of collecting arterial blood from critically ill patients, avoids problems such as blood contamination, and greatly improves and ensures testing efficiency and patient health. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the switching part in this utility model.

[0023] The diagram is labeled as follows:

[0024] 1 is the drainage tube, 2 is the first syringe, 3 is the second syringe, 4 is the switching part, 4-1 is the handle, 4-2 is the gear, 4-3 is the rack, 4-4 is the first magnetic strip, 4-5 is the second magnetic strip, 4-6 is the fixing plate, and 4-7 is the limiting component. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] In the following embodiments, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0029] Example 1:

[0030] like Figure 1-2 The diagram shows a combined arterial blood collection device, comprising: a puncture and drainage section, a collection section, and a switching section. The puncture and drainage section includes an arterial indwelling needle and a drainage tube 1 for draining blood, with the arterial indwelling needle connected to one end of the drainage tube 1. The collection section includes a first syringe 2 located at the other end of the drainage tube 1 for drawing back blood and a second syringe 3 located on the side wall of the drainage tube 1 near the other end for drawing arterial blood. The switching section 4 is located on the side wall of the drainage tube 1 near the other end and between the first syringe 2 and the second syringe 3, for switching the access state of the first syringe 2 and the second syringe 3.

[0031] In this technical solution, by combining the first syringe 2 and the second syringe 3 with the drainage tube 1, and switching the access states of the first syringe 2 and the second syringe 3 through a switching unit, during arterial blood collection, the access at the second syringe 3 is first cut off through the switching unit, and the first syringe 2 draws back blood. After the first syringe 2 finishes drawing back blood, the access at the first syringe 2 is cut off again through the switching unit, and the second syringe 3 draws arterial blood. After the second syringe 3 finishes drawing arterial blood, the access at the second syringe 3 is cut off again through the switching unit, and the first syringe 2 re-injects the drawn back blood into the drainage tube 1 to flow into the human body. This technical solution effectively avoids the problems of blood contamination caused by repeated insertion and removal of syringes and the cumbersome procedures.

[0032] More specifically, the switching unit 4 includes a gear 4-2 that rotates longitudinally near the side wall of the drainage tube 1, a rack 4-3 connected to the gear 4-2 and moving linearly perpendicular to the rotation direction of the gear 4-2, a second magnetic strip 4-5 disposed on the top of the rack 4-3 for closing the passage of the second syringe 3, a first magnetic strip 4-4 disposed on the bottom of the side wall of the rack 4-3 away from the second syringe 3 for closing the passage of the first syringe 2, a handle 4-1 with one end connected to the gear 4-2 for rotating the gear 4-2, a fixing plate 4-6 disposed on the inner wall of the drainage tube 1 for supporting the rack 4-3, and a limiting member 4-7 disposed on the fixing plate 4-6 for encircling and limiting the rack 4-3. Two limiting members 4-7 may be provided, located at opposite ends of the rack 4-3. The other end of the handle 4-1 passes through the side wall of the drainage tube 1. By controlling the rotation of gear 4-2 via handle 4-1 outside the drainage tube 1, the rise or fall of rack 4-3 is adjusted, so that the first magnetic strip 4-4 and the second magnetic strip 4-5 connected to rack 4-3 can respectively fit and seal with the first syringe 2 and the second syringe 3. The length of the first magnetic strip 4-4 is at least the distance from the side wall connected to rack 4-3 to the connection point between the drainage tube 1 and the first syringe 2. The length of the second magnetic strip 4-5 satisfies the following conditions: when gear 4-2 meshes with the lowest tooth of rack 4-3, the end of the second magnetic strip 4-5 (i.e., the end not connected to rack 4-3) is higher than the connection point between the second syringe 3 and the drainage tube 1; when gear 4-2 meshes with the highest tooth of rack 4-3, the end of the second magnetic strip 4-5 (i.e., the end not connected to rack 4-3) is lower than the connection point between the second syringe 3 and the drainage tube 1. This ensures that when the rack 4-3 is raised by the gear 4-2, the second magnetic strip 4-5 also rises with the rack 4-3 until it seals the connection between the second syringe 3 and the drainage tube 1. At this point, the first magnetic strip 4-4 also moves away from the connection between the first syringe 2 and the drainage tube 1, resulting in a closed circuit for the first syringe 2 and a closed circuit for the second syringe 3. When the rack 4-3 is lowered by the gear 4-2, the first magnetic strip 4-4 also descends with the rack 4-3 until it seals the connection between the first syringe 2 and the drainage tube 1. At this point, the second magnetic strip 4-5 also moves away from the connection between the second syringe 3 and the drainage tube 1, resulting in a closed circuit for the first syringe 2 and a closed circuit for the second syringe 3. For example, the outer wall of the connection between the drainage tube 1 and the first syringe 2 and the second syringe 3 is provided with iron plates for attracting and fixing the first magnetic strip 4-4 and the second magnetic strip 4-5, respectively. To enhance the sealing of the handle 4-1, a slot is provided on the side wall of the drainage tube 1 for the handle 4-1 to pass through, and a sealing gasket is also provided on the side wall of the slot.

[0033] To accommodate different syringes, the other end of the drainage tube 1 is provided with a first interface for connecting to the first syringe 2; the side wall of the drainage tube 1 is provided with a second interface for connecting to the second syringe 3. The first and second interfaces can be adapted to different syringe types. For example, the second interface is a positive pressure threaded interface, adapted to the second syringe 3 used as a blood gas syringe.

[0034] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A combined arterial blood collection device, characterized in that, include: The puncture drainage section includes an arterial indwelling needle and a drainage tube (1) for draining blood, wherein the arterial indwelling needle is connected to one end of the drainage tube (1); The collection unit includes a first syringe (2) located at the other end of the drainage tube (1) for drawing back blood, and a second syringe (3) located on the side wall of the drainage tube (1) near the other end for drawing arterial blood. The switching unit (4) is located on the side wall of the drainage tube (1) near the other end and between the first syringe (2) and the second syringe (3), and is used to switch the passage state of the first syringe (2) and the second syringe (3).

2. The combined arterial blood collection device according to claim 1, characterized in that, The switching part (4) includes a gear (4-2) that rotates longitudinally near the side wall of the drainage tube (1), a rack (4-3) that is connected to the gear (4-2) and moves linearly in a direction perpendicular to the rotation of the gear (4-2), a second magnetic strip (4-5) located on the top of the rack (4-3) and used to close the passage of the second syringe (3), a first magnetic strip (4-4) located on the bottom of the side wall of the rack (4-3) away from the second syringe (3) and used to close the passage of the first syringe (2), and a handle (4-1) connected at one end to the gear (4-2) and used to rotate the gear (4-2), with the other end of the handle (4-1) passing through the side wall of the drainage tube (1).

3. The combined arterial blood collection device according to claim 2, characterized in that, The length of the first magnetic strip (4-4) is at least the distance from the side wall connected to the rack (4-3) to the point covering the connection between the drainage tube (1) and the first syringe (2).

4. The combined arterial blood collection device according to claim 2, characterized in that, The length range of the second magnetic strip (4-5) satisfies the following conditions: when the gear (4-2) meshes with the lowest tooth on the rack (4-3), the end of the second magnetic strip (4-5) is higher than the connection between the second syringe (3) and the drainage tube (1); when the gear (4-2) meshes with the highest tooth on the rack (4-3), the end of the second magnetic strip (4-5) is lower than the connection between the second syringe (3) and the drainage tube (1).

5. The combined arterial blood collection device according to claim 2, characterized in that, The drainage tube (1) has a slot on its side wall for the handle (4-1) to pass through, and the slot side wall is also provided with a sealing gasket.

6. The combined arterial blood collection device according to claim 2, characterized in that, Iron pieces for attracting and fixing the first magnetic stripe (4-4) and the second magnetic stripe (4-5) are respectively provided on the outer wall of the connection between the drainage tube (1) and the first syringe (2) and the second syringe (3).

7. The combined arterial blood collection device according to claim 2, characterized in that, The switching part (4) further includes a fixing plate (4-6) disposed on the inner wall of the drainage tube (1) and used to support the rack (4-3), and a limiting member (4-7) disposed on the fixing plate (4-6) and used to encircle and limit the rack (4-3).

8. The combined arterial blood collection device according to claim 7, characterized in that, Two limiting members (4-7) are provided, located at both ends of the rack (4-3).

9. The combined arterial blood collection device according to claim 2, characterized in that, The other end of the drainage tube (1) is provided with a first interface for connecting the first syringe (2); The drainage tube (1) has a second interface on its side wall for connecting the second syringe (3).

10. The combined arterial blood collection device according to claim 9, characterized in that, The second interface is a positive pressure interface.

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