Continuous oxyhemoglobin saturation monitoring probe placed in central venous catheter

Abstract

The utility model discloses a continuous oxyhemoglobin saturation monitoring probe arranged in a central venous catheter, and relates to the technical field of medical instruments. In the prior art, an oxyhemoglobin saturation monitoring probe is arranged on the outer wall of a central venous catheter body, the oxyhemoglobin saturation monitoring probe and the central venous catheter are directly integrally designed, however, the oxyhemoglobin saturation monitoring probe only needs to be used under specific conditions, and the medical cost is increased. The utility model provides a continuous oxyhemoglobin saturation monitoring probe arranged in a central venous catheter, an oxyhemoglobin saturation probe is fixedly connected with the head end of a guide wire, the guide wire is electrically connected with an oxyhemoglobin connecting wire, and a sealing cap is fixedly connected at the junction of the guide wire and the oxyhemoglobin connecting wire. The oxyhemoglobin saturation probe can be directly pushed into the central venous catheter through the guide wire and is exposed out of the head, and the oxyhemoglobin saturation of the central vein can be continuously monitored in real time.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a continuous blood oxygen saturation monitoring probe that can be inserted into a central venous catheter. Background Technology

[0002] Central venous oxygen saturation is an important indicator of the body's oxygen supply and demand balance. Recent studies have shown its significant clinical value in guiding blood transfusions and early detection of hypoxia. A continuous oxygen saturation monitoring probe inserted into a central venous catheter is an instrument for measuring blood oxygen saturation. The sensor consists of two light-emitting diodes and one photoelectric diode, allowing for timely monitoring of blood oxygen levels during surgical procedures or in the care of critically ill patients. During surgery, central venous blood oxygen saturation is required (to monitor oxygen supply and demand balance). Currently, there are only two methods: one is to draw blood from the patient's central venous system for blood gas analysis, which is not real-time; the other is to directly insert a central venous catheter with oxygen saturation monitoring capabilities.

[0003] A search revealed Chinese patent CN213993537U, which discloses a central venous catheter device, including a blood oxygen saturation probe installed inside the catheter and a blood oxygen connection line electrically connected to the blood oxygen saturation probe. It can monitor the blood oxygen saturation of blood returning from the internal jugular vein, with high measurement accuracy and convenient operation for measuring blood oxygen saturation.

[0004] The existing technology has the following problems: the existing central venous catheter is an integrated device, but the utilization rate of monitoring central venous blood oxygen saturation is low. Monitoring is only required in specific situations, and when monitoring is required, the cost of use is high, resulting in poor practicality of the central venous catheter device. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a continuous oxygen saturation monitoring probe that can be inserted into a central venous catheter. When needed, the probe can be directly inserted into the patient's existing central venous catheter to continuously monitor the patient's central venous oxygen saturation in real time.

[0006] The main idea of ​​the technical solution adopted in this utility model is to achieve electrical connection between the blood oxygen saturation probe and the blood oxygen connection line through the guide wire, and at the same time push the blood oxygen saturation probe into the central venous catheter through the guide wire, and seal it with a sealing cap, so as to achieve continuous real-time monitoring of central venous blood oxygen saturation with a simple structure.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A continuous blood oxygen saturation monitoring probe placed in a central venous catheter, comprising a blood oxygen saturation probe and a blood oxygen connection line. It is characterized in that the blood oxygen saturation probe is electrically connected to a guide wire and the blood oxygen connection line. The probe is directly placed into the central venous catheter through the guide wire, and the guide wire and the blood oxygen connection line pass through a sealing cap and are fixedly connected to the sealing cap;

[0009] [[ID=,3]]Among them, the sealing cap is in the shape of a "mountain", and a cylindrical groove is penetrated through the center.

[0010] Through the above technical solutions, further: The cylindrical groove includes a large cylindrical groove and a small cylindrical groove, and the large cylindrical groove and the small cylindrical groove are adjacent and arranged in a stepped shape.

[0011] Through the above technical solutions, further: The small cylindrical groove is arranged at the head end of the sealing cap for installing the guide wire.

[0012] Through the above technical solutions, further: The large cylindrical groove is arranged at the tail end of the sealing cap for installing the sealing ring.

[0013] Through the above technical solutions, further: The sealing ring is provided with small holes, and the small holes are in interference fit with the blood oxygen connection line.

[0014] Through the above technical solutions, further: The protruding structure of the sealing cap is an inner plug.

[0015] Through the above technical solutions, further: The socket groove formed between the outer wall of the sealing cap and the inner plug.

[0016] Through the above technical solutions, further: The inner wall of the sealing cap is provided with a spiral joint.

[0017] The beneficial effects of the present utility model are:

[0018] 1. The blood oxygen saturation probe is placed into the central venous catheter through the guide wire, and at the same time, an electrical connection is achieved between the blood oxygen saturation probe and the blood oxygen connection line, realizing continuous real-time monitoring of the central venous blood oxygen saturation; [[ID=,32]]

[0019] 2. An interference fit is used between the sealing cap and the sealing ring, and between the sealing ring and the blood oxygen connection line. Medical sealant is further used to reinforce the seal at the joint between the bottom port of the sealing cap and the blood oxygen connection line, and then it is connected to the infusion head on the central venous catheter infusion pipeline, avoiding blood from overflowing outward through the gap between the guide wire and the central venous catheter, and at the same time avoiding blood backflow;

[0020] 3. The socket groove formed between the outer wall of the sealing cap and the inner plug, and the inner wall of the sealing cap is provided with a spiral joint, which can quickly connect the sealing cap to the infusion head and improve the sealing performance of the sealing cap;

[0021] 4. When using, pinch the sealing cap and apply force to the guidewire to insert the blood oxygen saturation probe into the central venous catheter. At the same time, slowly remove the protective bag to prevent external bacteria from entering the patient's body through the guidewire and causing infection.

[0022] 5. The blood oxygen saturation probe is inserted into a central venous catheter when needed, reducing medical costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0024] Figure 1 This is a schematic diagram of a continuous oxygen saturation monitoring probe inserted into a central venous catheter according to the present invention.

[0025] Figure 2 This is an exploded schematic diagram of a continuous oxygen saturation monitoring probe inserted into a central venous catheter according to the present invention.

[0026] Figure 3 This is a schematic diagram of the installation of a continuous oxygen saturation monitoring probe inserted into a central venous catheter according to the present invention.

[0027] Figure 4 This is a schematic diagram of the installation of a continuous oxygen saturation monitoring probe inserted into a central venous catheter according to the present invention.

[0028] Figure 5 This is a schematic diagram of the sealing cap structure of this utility model;

[0029] Figure 6 This is a cross-sectional view of the sealing cap of this utility model;

[0030] Figure 7 This is a sectional view of the sealing cap of this utility model after installation;

[0031] In the diagram: 1. Oxygen saturation probe; 2. Guide wire; 3. Oxygen connection wire; 4. Sealing cap; 401. Large cylindrical groove; 402. Small cylindrical groove; 403. Sealing ring; 404. Spiral connector; 5. Central venous catheter. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0034] In practice, the inventors found that when performing blood oxygen saturation monitoring, it is necessary to remove the ordinary central venous catheter and replace it with a central venous catheter with a blood oxygen saturation probe. This is not only inconvenient, but also increases the invasive operation of the patient. Thirdly, it is simply impossible to replace the catheter again during the operation, resulting in poor practicability of the central venous catheter device; and blood oxygen saturation monitoring is only required under specific circumstances, resulting in high medical costs for the venous catheter with an integrated design of the blood oxygen saturation monitoring probe and the central venous catheter.

[0035] Based on the above findings, the present application proposes a continuous blood oxygen saturation monitoring probe placed in a central venous catheter, which can directly place the probe into the central venous catheter when blood oxygen saturation in the central vein needs to be monitored, and continuously and real-time monitor the blood oxygen saturation of the patient's central vein. Embodiment

[0036] Refer to Figures 1-7 , the present application discloses a continuous blood oxygen saturation monitoring probe placed in a central venous catheter, including a blood oxygen saturation probe 1, a guide wire 2, a blood oxygen connection line 3, and a sealing cap 4. The blood oxygen saturation probe 1 is electrically connected between the guide wire 2 and the blood oxygen connection line 3. The probe is directly placed into the central venous catheter 5 through the guide wire 2, and the guide wire 2 and the blood oxygen connection line 3 pass through the sealing cap 4 and are fixedly connected to the sealing cap 4.

[0037] Among them, the sealing cap 4 is in a "mountain" shape, and a cylindrical groove is formed through the center. The cylindrical groove includes a large cylindrical groove 401 and a small cylindrical groove 402. The large cylindrical groove 401 and the small cylindrical groove 402 are adjacent and in a stepped shape. The small cylindrical groove 402 is arranged at the head end of the sealing cap 4 for installing the guide wire 2. The aperture of the small cylindrical groove 402 is slightly larger than the diameter of the guide wire 2, and the height of the small cylindrical groove 402 is about 3 times the height of the large cylindrical groove 401. The large cylindrical groove 401 is arranged at the tail end of the sealing cap 4 for installing the sealing ring 403. The sealing ring 403 is blocked by the bottom port of the sealing cap 4 to prevent the sealing ring 403 from falling out of the sealing cap 4.

[0038] Specifically, the protruding structure of the sealing cap 4, that is, the long end of the "mountain" shape is an inner plug. The inner plug is inserted into the infusion head on the infusion pipeline of the central venous catheter 5. The socket groove formed between the outer wall of the sealing cap 4 and the inner plug, and a spiral joint 404 is provided on the inner wall of the sealing cap 4, which can quickly connect the sealing cap 4 with the infusion head and improve the sealing performance of the sealing cap 4.

[0039] The outer diameter of the sealing ring 403 is larger than the diameter of the large cylindrical groove 401, preventing blood from seeping out from the gap between the sealing ring 403 and the large cylindrical groove 401. Simultaneously, the inner diameter of the sealing ring 403 is smaller than the diameter of the oxygen supply line 3, resulting in an interference fit with the oxygen supply line 3. This prevents the oxygen supply line 3 from sliding out of the sealing ring 403 or rotating within it, thus preventing blood outflow. Alternatively, medical sealant can be used to further reinforce the seal at the junction of the bottom port of the sealing cap 4 and the side wall of the oxygen supply line 3, ensuring a good seal.

[0040] It is worth noting that the guidewire 2 is slightly longer than the infusion tubing length of the central venous catheter 5, ensuring that the oxygen saturation probe 1 extends beyond the central venous catheter 5 without being too long and causing harm to the patient.

[0041] One usage procedure in this embodiment is as follows: Cut open the protective bag of the blood oxygen saturation monitoring probe from both the front and rear ends. Pinch the guide wire 2 outside the protective bag and push the blood oxygen saturation monitoring probe out from the front end of the protective bag. Insert the blood oxygen saturation monitoring probe into the infusion head. Then, continue to push the guide wire 2 into the infusion tubing and infusion head of the central venous catheter 5. At the same time, pull the protective bag back towards the rear end. When the sealing ring 403 is close to the infusion head, remove the protective bag from the rear end and pinch the sealing ring 403. Quickly connect the sealing ring 403 to the infusion head. At this time, the blood oxygen saturation monitoring probe just protrudes from the central venous catheter 5. Finally, connect the blood oxygen connection line 3 to the device to continuously monitor the patient's central venous blood oxygen saturation in real time.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A continuous blood oxygen saturation monitoring probe for placement in a central venous catheter, comprising a blood oxygen saturation probe (1) and a blood oxygen connection line (3), characterized in that, The blood oxygen saturation probe (1) is electrically connected to the guide wire (2) and the blood oxygen connection line (3). The probe is directly inserted into the central venous catheter (5) through the guide wire (2). The guide wire (2) and the blood oxygen connection line (3) pass through the sealing cap (4) and are fixedly connected to the sealing cap (4). Among them, the sealing cap (4) is in the shape of a "mountain", and a cylindrical groove is provided through the center thereof.

2. The continuous blood oxygen saturation monitoring probe for implantation in a central venous catheter according to claim 1, characterized in that: The cylindrical groove includes a large cylindrical groove (401) and a small cylindrical groove (402). The large cylindrical groove (401) and the small cylindrical groove (402) are arranged adjacent to each other in a stepped shape.

3. The continuous blood oxygen saturation monitoring probe for implantation in a central venous catheter according to claim 2, characterized in that: The small cylindrical groove (402) is provided at the head end of the sealing cap (4) for installing the guide wire (2).

4. The continuous blood oxygen saturation monitoring probe for implantation in a central venous catheter according to claim 2, characterized in that: The large cylindrical groove (401) is provided at the tail end of the sealing cap (4) for installing the sealing ring (403).

5. The continuous blood oxygen saturation monitoring probe for placement in a central venous catheter of claim 4, wherein: The sealing ring (403) is provided with small holes, and the small holes are in interference fit with the blood oxygen connection line (3).

6. The continuous blood oxygen saturation monitoring probe for placement in a central venous catheter of claim 1, wherein: The protruding structure of the sealing cap (4) is an inner plug.

7. The continuous blood oxygen saturation monitoring probe for placement in a central venous catheter of claim 6, wherein: An insertion socket groove is formed between the outer wall of the sealing cap (4) and the inner plug.

8. The continuous blood oxygen saturation monitoring probe for placement in a central venous catheter of claim 1, wherein: A spiral joint (404) is provided on the inner wall of the sealing cap (4).

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