Central venous catheter assembly

Abstract

The utility model provides a central venous catheter assembly, which comprises a puncture needle, a central venous catheter, a central venous catheter and a central venous catheter, the puncture needle is sleeved with the catheter, and the needle tip of the puncture needle is exposed out of the front end of the catheter; the blood stop valve is arranged at the rear end of the catheter, the blood stop valve is connected with a branch pipe, the branch pipe is provided with a Robert clamp, and a three-way connector is arranged at the tail end of the branch pipe; the standard Luer taper is connected to the tail end of the puncture needle, the standard Luer taper is connected with the blood stop valve, and the standard Luer taper is connected with an external injector or a plug; the needle holder is arranged on the catheter and used for clamping the catheter in the catheter pushing process; and the sensor module is arranged on the catheter and is used for monitoring the physical sign data, processing the physical sign data, comparing the processed physical sign data with a standard threshold value, and generating a warning signal when a preset threshold value is reached. According to the utility model, whether the catheter displaces or leaks liquid can be monitored in real time, so that a clinician can find complications caused by catheter displacement as soon as possible.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, and it is a kind of central venous catheter assembly. BACKGROUND

[0002] The basic configuration of the existing central venous catheter kit generally includes a central venous catheter, a puncture needle, a guide wire and a dilator. When used, the puncture needle is first inserted into the central vein, then the guide wire is placed, and then the central venous catheter is placed with the help of the dilator. The existing method needs four steps of puncture-guide wire placement-skin expansion-infusion catheter placement to complete the placement of the central venous catheter, and the operation process is complex and difficult to operate, which is prone to operation errors and risks to the life safety of patients.

[0003] During the operation process, the body temperature regulation and monitoring of the patient is crucial, especially the phenomenon of low body temperature of the patient during the operation process is widespread, and low body temperature can cause serious harm to the body, leading to serious postoperative complications and adversely affecting the recovery of the patient. Therefore, during the central venous catheter operation process, correct and effective body temperature regulation and monitoring is crucial, and the rectal temperature, tongue temperature, axillary temperature, bladder temperature and nasopharyngeal temperature are commonly used to measure the body temperature of the human body. However, these body temperature measurement methods cannot accurately reflect the body temperature of the patient.

[0004] In addition, during the operation process, problems such as catheter displacement or liquid leakage may occur, which can lead to serious complications such as pleural effusion. UTILITY MODEL CONTENT

[0005] In view of the problems in the background art, the purpose of the utility model is to provide a central venous catheter assembly which can insert the central venous catheter at one time and simplify the operation process. It can accurately monitor the body temperature of the patient during the operation, accurately monitor the problems such as catheter displacement or liquid leakage, and reduce the risk of surgical complications.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a central venous catheter assembly, which comprises a puncture needle, the puncture needle is a hollow needle, a catheter is sleeved on the puncture needle, the needle tip of the puncture needle is exposed at the front end of the catheter, a blood flow stop valve is arranged at the rear end of the catheter, the blood flow stop valve is connected with a branch pipe, the branch pipe is provided with a Robert clamp, and a three-way joint is arranged at the end of the branch pipe. A standard luer joint is connected to the end of the puncture needle, the standard luer joint is connected with the blood flow stop valve, the standard luer joint is connected with an external syringe or a plug, a needle holder is arranged on the catheter for clamping the catheter during the pushing process of the catheter, and a sensor module is arranged on the catheter for monitoring the vital sign data and comparing each vital sign data with a standard threshold value after processing, and a warning signal is generated when the predetermined threshold value is reached.

[0007] In an embodiment, the sensor module comprises: a sensor for detecting various vital signs; a transmission line arranged in the catheter and connected to the sensor, the transmission line being sealedly connected to the catheter; and a signal processor arranged in the blood flow stop valve and connected to the transmission line for receiving and processing the detected signals.

[0008] In an embodiment, the sensor is arranged in or outside the catheter, preferably outside the catheter.

[0009] In an embodiment, the sensor is a temperature sensor and a pressure sensor.

[0010] In an embodiment, the temperature sensor is arranged at a distance of 2-120 mm from the front end of the catheter.

[0011] In an embodiment, the pressure sensor is arranged in three, i.e., a first pressure sensor, a second pressure sensor and a third pressure sensor, the first pressure sensor being arranged at a distance of 10 mm from the front end of the catheter, the second pressure sensor being arranged at a distance of 30 mm from the first pressure sensor, and the third pressure sensor being arranged at a distance of 30 mm from the second pressure sensor.

[0012] In an embodiment, the signal processor is connected to a remote intelligent device.

[0013] In an embodiment, the remote intelligent device is a monitor and / or a mobile device of a medical staff and / or a smart phone of a patient.

[0014] In an embodiment, the data transmission is wired transmission and / or wireless transmission, the wireless transmission including one of Bluetooth, radio frequency, Rfid and radar signal.

[0015] In an embodiment, the catheter is pushed into the central vein under a visualization technique, and the puncture injury can be avoided under visual assistance.

[0016] The utility model discloses the beneficial effects are as follows:

[0017] 1. The utility model discloses simple structure, one -time insertion central vein catheter, simplifies operation procedure.

[0018] 2. The utility model discloses set up sensor module, can accurate monitoring in -operation central body temperature, and the temperature of anus temperature, tongue temperature, axillary temperature, bladder temperature, nasopharyngeal temperature has medical guidance significance more.

[0019] 3. The utility model discloses can real -time monitoring whether the catheter is displaced or leaks, thereby make clinical doctor can discover the complication caused by catheter displacement early. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the present application, the drawings used in the embodiments will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0021] Figure 1 Front view of the central venous catheter assembly according to the present application (gripper not shown).

[0022] Figure 2 Rear view of the central venous catheter assembly according to the present application (gripper not shown).

[0023] Figure 3 Right view of the central venous catheter assembly according to the present application (gripper not shown).

[0024] Figure 4 Perspective view of the central venous catheter assembly according to the present application (gripper not shown).

[0025] Figure 5 Top view of the central venous catheter assembly according to the present application (gripper not shown).

[0026] Figure 6 Front view of Figure 5 Enlarged view of the local position A (puncture needle not shown).

[0027] Figure 7 Perspective view of the central venous catheter assembly according to the present application (puncture needle not shown).

[0028] Figure 8 Front view of an embodiment of the central venous catheter assembly according to the present application.

[0029] Figure 9 Right view of Figure 8 the embodiment.

[0030] Figure 10 Perspective view of Figure 8 the embodiment.

[0031] Figure 11 Front view of another embodiment of the central venous catheter assembly according to the present application.

[0032] Figure 12 Right view of Figure 11 the embodiment.

[0033] Figure 13 Perspective view of Figure 11 the embodiment.

[0034] Figure 14is a front view perspective view of still another embodiment of the central venous catheter assembly according to the utility model.

[0035] Figure 15 is Figure 14 a perspective view of an embodiment.

[0036] illustration:

[0037] 1 puncture needle, 2 catheter, 3 blood flow stop valve, 31 branch pipe, 32 Robert clamp, 33 tee joint, 4 standard luer joint, 41 external syringe, 42 plug, 5 needle holder, 6 sensor module, 61 temperature sensor, 62 pressure sensor, 63 transmission line, 64 signal processor DETAILED DESCRIPTION

[0038] The preferred embodiments of the utility model will be described in more detail below with reference to the drawings. Although the preferred embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments set forth here.

[0039] Referring to Figures 1 to 15 , the central venous catheter assembly according to the utility model comprises: a puncture needle 1, which is a hollow needle; a catheter 2, which is sleeved on the puncture needle 1, with the needle tip of the puncture needle 1 exposed at the front end of the catheter 2; a blood flow stop valve 3, which is arranged at the rear end of the catheter 2, connected with a branch pipe 31, the branch pipe 31 is provided with a Robert clamp 32, and the distal end of the branch pipe 31 is provided with a tee joint 33; a standard luer joint 4, which is connected to the distal end of the puncture needle 1, connected with the blood flow stop valve 3, and connected with an external syringe 41 or a plug 42; a needle holder 5, which is arranged on the catheter 2 and used for clamping the catheter 2 during the pushing of the catheter 2; and a sensor module 6, which is arranged on the catheter 2, monitors the vital sign data, compares each vital sign data with a standard threshold value after processing, and generates an alarm signal when the predetermined threshold value is reached.

[0040] In the central venous catheter assembly according to the utility model, the puncture needle 1 can be a hollow needle made of medical stainless steel or made of other materials. The distal end of the puncture needle 1 is provided with a beveled surface, the distal end of which forms a tip for penetrating into the body tissue, and the inside of the puncture needle 1 has a hollow channel for the flow of liquid. After the puncture needle 1 successfully punctures into the central vein, blood will flow through the hollow channel of the puncture needle 1 due to the negative pressure of liquid extraction and the blood pressure in the central vein. The catheter 2 is provided with a blood flow stop valve 3, the standard luer joint 4 is connected with the blood flow stop valve 3, the standard luer joint 4 is connected with an external syringe 41, and Figure 14 and Figure 15 At this time, whether the puncture needle 1 has successfully punctured in place can be judged by visual observation or the blood pressure data detected by the sensor module 6.

[0041] In the central venous catheter assembly according to the present application, the puncture needle 1 enters the catheter 2 and extends in the catheter 2, the proximal end of the bevel of the puncture needle 1 extends beyond the tip of the front end of the catheter 2 by less than 1 mm. The outer diameter of the front end of the catheter 2 is gradually tapered and intersects with the inner surface of the catheter 2 at the tip, i.e. the outer diameter gradually decreases to the same as the inner diameter, and the inner diameter of the catheter 2 can be set to be not less than the outer diameter of the puncture needle 1. It should be noted that the inner diameter of the front end of the catheter 2 and the outer diameter of the puncture needle 1 remain constant along their lengths. When the puncture needle 1 enters the catheter 2 and the proximal end of the distal bevel thereof extends beyond the tip of the catheter 2, since the outer diameter of the front end of the catheter 2 is gradually tapered to the same as the inner diameter, the outer surface of the assembly composed of the puncture needle 1 and the catheter 2 is a continuous surface, facilitating the penetration of both into the central vein. After the puncture needle 1 enters the central vein, the catheter 2 also enters the skin. When the puncture is completed, the catheter 2 is manually pushed forward by a certain distance and the puncture needle 1 is withdrawn. This operation does not cause the catheter 2 to be withdrawn, and at this time the catheter 2 remains in the central vein, so that subsequent injection operations can be continued. Through such a structure, relative movement between the puncture needle 1 and the catheter 2 during the process of entering the central vein can be effectively prevented, and the catheter 2 is not brought out during the reverse withdrawal from the central vein, and the structure is simple and convenient to operate.

[0042] When the user operates the central venous catheter assembly, after successfully puncturing the puncture needle 1 into the central vein, the front end of the catheter 2 is slowly sent into the central vein by a small distance, and then the puncture needle 1 is slowly withdrawn towards the proximal end while the catheter 2 is continuously sent into the central vein. The external syringe 41 connected to the standard luer joint 4 can be removed, and the standard luer joint 4 can be connected to the plug 42. Through the three-way joint 33, multiple operations can be performed, including liquid injection operation, or in-situ blood sampling to accurately detect blood drug concentration. The three-way joint can quickly take blood without the need for additional blood sampling, which is convenient for in-situ operation. Sampling and drug infusion can be performed simultaneously, and the plug can be inserted or removed at any time. The central venous catheter assembly of the present application simplifies the puncture process, and the steps of puncture-placing a guide wire-expanding the skin-placing a transfusion catheter in the prior art are simplified to puncture-pushing the catheter, which avoids adverse conditions such as displacement of the puncture point, disengagement of the guide wire, and over-expansion of the skin, improves the puncture success rate, and effectively reduces the operation time.

[0043] In an embodiment of the sensor module 6, with reference to Figure 1 , Figure 5 and Figure 6The sensor module 6 can include: a sensor for detecting various vital parameters; a transmission line 63 arranged in the catheter 2 and connected to the sensor, the transmission line 63 being in sealed connection with the catheter 2; and a signal processor 64 arranged in the blood flow stop valve 3 and connected to the transmission line 63 for receiving and processing the detected signals. The transmission line 63 is a metal wire wrapped with plastic on the outer surface. The transmission line 63 does not affect the infusion of the catheter 2. The sealed connection can be achieved by using UV glue curing sealing. The sensor can include a temperature sensor 61 and a pressure sensor 62. The sensor can be arranged inside or outside the catheter, and is preferably arranged outside the catheter.

[0044] In the central venous catheter assembly of the present application, the total length of the catheter 2 can be 10-30 cm, preferably 18-25 cm, and in the embodiment shown, the length of the catheter 2 is 204 mm, but the present application is not limited thereto. Generally, the length of the catheter 2 inserted into the blood vessel is about 12-15 cm, and in clinical practice, the length is determined according to the physical condition of the patient, such as the height and weight of the patient. Figure 5 In the embodiment shown, the length of the catheter 2 is 204 mm, but the present application is not limited thereto. Generally, the length of the catheter 2 inserted into the blood vessel is about 12-15 cm, and in clinical practice, the length is determined according to the physical condition of the patient, such as the height and weight of the patient.

[0045] In an embodiment, the temperature sensor 61 can be 2-120 mm away from the front end of the catheter 2. Preferably, the distance is 5-80 mm. In clinical practice, the distance is selected according to the patient's condition. After the catheter 2 is inserted into the vein, the temperature sensor 61 is preferably located inside the blood vessel to ensure that the measured data are all blood temperature data. This arrangement can ensure that the measured temperature data are not affected by the injection liquid in the inner cavity of the catheter 2. For example, if the distance is more than 120 mm, the temperature sensor 61 can be buried in the subcutaneous tissue outside the blood vessel, and the temperature data monitored by the temperature sensor 61 outside the blood vessel cannot accurately reflect the central body temperature of the patient. Figure 6 In the embodiment shown, the temperature sensor 61 is arranged inside the catheter 2, but the present application is not limited thereto. The temperature sensor 61 of the present application is preferably arranged outside the catheter 2.

[0046] The temperature monitored by the temperature sensor 61 of the present application is the central blood temperature (central body temperature) of the patient. As known by those skilled in the art, the blood temperature represents the central body temperature of the body. Compared with the body temperature measured by the conventional method, the temperature is more accurate and can better represent the central temperature of the body, which is more meaningful for clinical diagnosis. Body temperature regulation and monitoring are of great significance in surgical operations. Correct and effective body temperature regulation and monitoring can reduce the risk of surgery and promote the recovery of patients. A suitable body temperature monitoring method can help medical staff to understand the body temperature of the patient in real time, adjust in time, and ensure the safe and smooth progress of the operation. The present application can accurately measure the intraoperative body temperature, has high accuracy, thereby improving the quality of the operation and protecting the safety and health of the patient.

[0047] In the central venous catheter assembly, the signal processor 64 of the sensor module 6 compares the temperature data detected by the temperature sensor 61 with the set temperature threshold (generally 36.5-37.5 degrees), determines the difference, and generates an alarm signal when the difference reaches a predetermined threshold. Monitor whether the patient has hypothermia or hyperthermia during the operation.

[0048] In the central venous catheter assembly, the pressure sensor 62 of the sensor module 6 can be provided in multiple, and the signal processor 64 of the sensor module 6 can compare the pressure data monitored by each pressure sensor 62 with the threshold to determine the difference, and generate an alarm signal when the difference reaches a predetermined threshold. Multi-point monitoring of central venous pressure can make clinical evaluation more accurate. In addition, the utility model sets multiple pressure sensors 62, and if the pressure data of the multiple pressure sensors 62 is not the same and differs by more than a predetermined threshold, the patient can be diagnosed as displaced or leaking. In an embodiment, the pressure sensor 62 can be provided as two or three. Preferably, the pressure sensor 62 is provided at a position 1-8 cm from the front end of the catheter 2.

[0049] In a preferred embodiment, referring to Figure 5 and Figure 6 , the pressure sensor 62 is provided as three, which are a first pressure sensor, a second pressure sensor, and a third pressure sensor, the first pressure sensor is 10 mm from the front end of the catheter 2, the second pressure sensor is 30 mm from the first pressure sensor, and the third pressure sensor is 30 mm from the second pressure sensor. If the signal processor 64 of the sensor module 6 receives different pressure data detected by the three pressure sensors 62, the patient can be diagnosed as displaced or leaking. For example, when the pressure of the first pressure sensor 62 is monitored to be 0 or negative, it can be diagnosed that the front end of the catheter 2 has broken through the heart and is displaced outside the heart, which is a serious medical problem. Through the device, it can be detected automatically as soon as possible to avoid causing serious complications such as pleural effusion and infusion of liquid into the chest cavity. The utility model judges the position of the catheter tip (piercing the heart, breaking through the heart, entering the chest cavity, etc.) by setting multiple pressure detection. The catheter is not limited to the central venous catheter described in the utility model, but also includes PICC catheters, infusion tubes and other infusion catheters.

[0050] In the central venous catheter assembly of the utility model, the signal processor 64 of the sensor module 6 is connected to the remote intelligent device. The signal processor 64 transmits the monitored data to the remote intelligent device. The remote intelligent device outputs the relevant output data to the doctor or patient, outputs the warning signal and records the result. The output data includes: the sign data detected by the sensor, and other data and warning signals based on calculation and processing, for example, the warning signal of the displacement of the catheter 2. In an embodiment, the remote intelligent device can be a monitor and / or a mobile device of medical staff and / or a smart phone of the patient. The data can be transmitted to the monitor or the APP of the doctor's mobile phone, facilitating real-time monitoring and remote monitoring of the doctor.

[0051] In the central venous catheter assembly of the utility model, the data transmission between the sensor module 6 and the remote intelligent device can be through wired or wireless connection, preferably through wireless connection. The wireless connection includes one of Bluetooth, radio frequency, Rfid and radar signal. For example: after the wireless connection is completed, the doctor or nurse starts to monitor the central venous temperature, venous pressure and the position of the catheter 2 of the patient through the mobile application program on the remote intelligent device. Auditory and visual notifications can also be received directly from the intelligent device.

[0052] The central venous catheter assembly of the utility model pushes the catheter 2 into the central vein under the visualization technology, and the puncture injury can be avoided under the visual assistance. The visualization technology can be ultrasonic guidance. The utility model can push the catheter 2 into the central vein under the ultrasonic guidance, and the puncture injury can be avoided under the visual assistance. The development of the puncture needle 1 can accurately position the puncture position. The puncture needle 1 can also be enhanced to develop, so as to be more accurately positioned. In an embodiment, the puncture needle 1 is enhanced to develop, and the puncture needle 1 is provided with a developing agent.

[0053] In an embodiment, the needle holder 5 can be a clamp type needle holder (refer to Figures 8 to 10 ) or a clip type needle holder (refer to Figures 11 to 13 ). The material of the part of the needle holder 5 in contact with the catheter 2 is silicone rubber. The anti-skid effect of the silicone rubber is better.

[0054] In an embodiment, the material of the catheter can be one of PP, PE, TPU and TPE soft material.

[0055] In an embodiment, the surface of the catheter and the puncture needle can be provided with a super-smooth coating. The super-smooth coating can reduce the puncture resistance, so that the traditional blood vessel expansion can not be done. In an embodiment, the super-smooth coating is one of paclitaxel coating, Teflon coating and hydrophilic coating.

[0056] In an embodiment, the surface of the catheter and the puncture needle is provided with an antibacterial coating.

[0057] In one embodiment, the catheter and the needle are provided with an anticoagulant coating.

[0058] In one embodiment, the catheter is provided as a single lumen or a multi-lumen catheter. One lumen can be provided in the catheter, but in some embodiments, two lumens can be provided in the catheter. For example, the two lumens can be separated by a partition extending longitudinally along the length of the catheter, the needle enters the first lumen through the blood flow stop valve and does not puncture into the second lumen. The first lumen and the second lumen can be connected to two infusion tubes, respectively, which are connected to, for example, corresponding infusion sources. However, it is understood that three or more lumens can be provided in the catheter, which is not limited here. By providing multiple lumens in the catheter 2 and connecting them to multiple infusion tubes, respectively, various application scenarios can be applied, making multi-thread operation more convenient.

[0059] In a preferred embodiment, the external syringe connected by the standard luer connector is an automatic negative pressure maintaining syringe.

[0060] The sensor module of the utility model can be provided for monitoring the physical data of the patient, which can not only include body temperature, but also blood pressure, blood sugar, blood oxygen saturation, etc.

[0061] Other embodiments of the utility model will occur to those skilled in the art, having the benefit of the description and practice of the utility model disclosed herein. The utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice in the art to which the utility model pertains. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. A central venous catheter assembly, characterized by, The application relates to a central venous catheter system, comprising: a puncture needle, which is a hollow needle; a catheter, which is sleeved on the puncture needle, and the needle tip of the puncture needle is exposed at the front end of the catheter; a blood flow stop valve, which is arranged at the rear end of the catheter, is connected with a branch pipe, the branch pipe is provided with a Robert clamp, and the end of the branch pipe is provided with a three-way joint; a standard luer joint, which is connected with the end of the puncture needle, is connected with the blood flow stop valve, and is connected with an external syringe or a plug; a needle holder, which is arranged on the catheter, is used for clamping the catheter during pushing the catheter; and a sensor module, which is arranged on the catheter, is used for monitoring physical sign data, comparing the physical sign data with standard threshold values after processing, and generating an alarm signal when a predetermined threshold value is reached. The sensor module comprises a sensor for detecting physical sign parameters, a transmission line arranged in the catheter and connected with the sensor, and a signal processor arranged on the blood flow stop valve and connected with the transmission line for receiving and processing the detected signals. The sensor is arranged in or outside the catheter. The sensor is a temperature sensor and a pressure sensor. The temperature sensor is 2-120 mm away from the front end of the catheter. The pressure sensor is arranged in three parts, namely a first pressure sensor, a second pressure sensor and a third pressure sensor, the first pressure sensor is 10 mm away from the front end of the catheter, the second pressure sensor is 30 mm away from the first pressure sensor, and the third pressure sensor is 30 mm away from the second pressure sensor. The signal processor is connected to a remote intelligent device. The remote intelligent device is a monitor and / or a mobile device of medical staff and / or a smart phone of a patient.

2. The central venous catheter assembly of claim 1, wherein, Data transmission is wired transmission and / or wireless transmission, the wireless transmission comprises one of Bluetooth, radio frequency, Rfid and radar signals.

3. The central venous catheter assembly of claim 1, wherein, The catheter is pushed into a central vein under visual technology, and puncture injury can be avoided under visual assistance.

4. The central venous catheter assembly of claim 1, wherein, ​ 5. The central venous catheter assembly of claim 1, wherein, ​ 6. The central venous catheter assembly of claim 1, wherein, ​ 7. The central venous catheter assembly of claim 2, wherein, ​ 8. The central venous catheter assembly of claim 1, wherein, ​ 9. The central venous catheter assembly of claim 1, wherein, ​ 10. The central venous catheter assembly of claim 1, wherein, ​

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