JP2009297403A - Device for preventing needle detachment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional dialysis needle detachment and blood leakage detecting sensor requires too much time to detect detachment after the detachment of a dialysis needle since it takes a long time to establish electrical continuity between electrodes 2, 3 and branch electrodes 4, 5. <P>SOLUTION: In a device for preventing needle detachment, ultrasonic transducers 9, 10 are respectively mounted in the middle of dialysis needles 7, 8. Each of the dialysis needles 7, 8 has one end connected to a dialyzer 11 and the other end inserted into a blood vessel 12, and the ultrasonic transducers 9, 10 are connected each to a vibration detecting device 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a needle drop prevention device that can prevent a dialysis needle from coming off a blood vessel.

  Conventionally, as shown in FIG. 4, the dialysis needle leakage sensor has electrodes 2 and 3 mounted in parallel on the surface of a water-absorbing substrate 1, and a large number of branch electrodes 4, between these electrodes 2 and 3. 5 has been proposed that protrudes from the electrodes 2 and 3 in the vicinity of the electrodes, and the electrodes 2 and 3 are connected to a sensor circuit.

The dialysis needle leakage sensor configured as described above is placed in the vicinity of the dialysis needle 6, and when the dialysis needle 6 stuck in the blood vessel is removed from the blood vessel, the water-absorbing substrate 1 is wetted by the leaked blood. When the electrodes 2 and 3 and the branch electrodes 4 and 5 are conducted, the sensor circuit detects the conduction, and a buzzer mounted in the sensor circuit reports the sound. It takes a long time for the blood to penetrate through the water-absorbing base material, and the electrodes 2 and 3 and the branch electrodes 4 and 5 become conductive, and it takes too long to detect the removal after the dialysis needle is removed. There was a problem.
JP 2006-55588 A

  The problem to be solved is that, in the conventional dialysis needle leakage sensor, it takes time until the electrodes 2 and 3 and the branch electrodes 4 and 5 become conductive, and until the removal after the dialysis needle is removed is detected. There was a problem that the time was too long.

  In the present invention, a dialysis needle connected to an artificial dialysis machine equipped with an ultrasonic vibrator, and vibration due to blood flow flowing in a blood vessel connected to the ultrasonic vibrator and transmitted to the ultrasonic vibrator are detected. The vibration detecting device detects vibration of the blood flow by the vibration detecting device, and detects the dialysis needle from coming out of the blood vessel by detecting the disturbance or no detection of the blood flow vibration.

  The needle drop prevention device of the present invention has an advantage that when a dialysis needle stuck in a blood vessel comes out, vibration of the blood flow is not transmitted to the ultrasonic transducer at the same time as the needle removal, so that the needle drop is detected immediately. is there.

  In the present invention, an ultrasonic vibrator is attached to a dialysis needle connected to an artificial dialysis machine, and vibration of a blood flow flowing in a blood vessel transmitted to the ultrasonic vibrator is detected by a vibration detection device connected to the ultrasonic vibrator. By detecting this, the needle omission from the blood vessel of the dialysis needle is detected based on disturbance or no detection of the vibration of the blood flow.

  FIG. 1 is a configuration diagram of a needle drop prevention device according to an embodiment of the present invention. Dialysis needles 7 and 8 are each equipped with ultrasonic transducers 9 and 10 in the middle, and one end of each of the dialysis needles 7 and 8 is a dialyzer 11. The other end is inserted into the blood vessel 12 under the skin 14, and the ultrasonic transducers 9 and 10 are connected to the vibration detection device 13, respectively.

  In the needle omission prevention device of this embodiment configured as described above, first, when the dialysis needles 7 and 8 inserted into the blood vessel 12 do not come out of the blood vessel 12, the ultrasonic vibrations of the dialysis needles 7 and 8 respectively. As shown in FIG. 2, the vibration A from the repeated blood flow is transmitted to each of the children 9 and 10, and the vibration A of the blood flow transmitted to the ultrasonic transducers 9 and 10 is detected by the vibration detection device 13. The

  Here, when one of the dialysis needles 7 and 8 has passed through the blood vessel 12, the vibration detection device 13 does not detect blood flow vibration or normal vibration from the blood flow is not detected. When the vibration detection device 13 detects no flow vibration detection or blood flow vibration disturbance, the vibration detection device 13 immediately reports a buzzer or the like notifying the abnormality.

  FIG. 3 is a configuration diagram of a needle omission prevention device according to another embodiment of the present invention, in which 7 is a dialysis needle, 9 is an ultrasonic transducer, 11 is a dialysis machine, 12 is a blood vessel, and 13 is a vibration detection device. Since the configuration is the same as that in the above embodiment, the description is omitted, but in this embodiment, the ultrasonic transducer 9 is mounted near the tip of the dialysis needle.

  In the needle omission prevention device of this embodiment configured as described above, when the dialysis needle 7 is inserted into the blood vessel 12 by being mounted in the vicinity of the distal end of the dialysis needle 7, vibration from the blood flow exceeds the dialysis needle 7. Since the vibration of the blood flow transmitted to the ultrasonic transducer 9 is detected by the vibration detecting device 13 and the dialysis needle 7 is removed, the vibration detecting device is used. 13, vibration from the bloodstream cannot be detected, so that the needle removal of the dialysis needle 7 can be immediately notified by a buzzer or the like attached to the vibration detection device 13.

  In the above embodiment, the ultrasonic vibrators 9 and 10 are attached between the dialysis needles 7 and 8 or the ultrasonic vibrators 9 and 10 near the tip of the dialysis needles 7 and 8 are attached. An ultrasonic transducer may be attached in the middle of either one of 7 and 8, and an ultrasonic transducer may be attached to the tip of the other dialysis needle.

It is sectional drawing of the needle | hook removal prevention apparatus of the Example of this invention. FIG. 2 is a waveform diagram of blood flow vibration detected by the ultrasonic transducer of FIG. 1. It is sectional drawing of the needle | hook removal prevention apparatus of the other Example of this invention. FIG. 6 is a plan view of a conventional dialysis needle leakage sensor.

Explanation of symbols

7, 8 Dialysis needle 9,10 Ultrasonic vibrator 11 Dialysis machine 12 Blood vessel 13 Vibration detection device 14 Skin

Claims (3)

  A dialysis needle connected to an artificial dialysis machine equipped with an ultrasonic transducer, and a vibration detecting device connected to the ultrasonic transducer and detecting vibration due to blood flow flowing in a blood vessel transmitted to the ultrasonic transducer; A needle omission prevention device comprising: detecting vibration of the blood flow by the vibration detection device, and detecting omission of the dialysis needle from a blood vessel based on disturbance or no detection of vibration of the blood flow.   The needle dropout prevention device according to claim 1, wherein the ultrasonic vibrator is mounted inside a tip of the dialysis needle.   2. The needle drop prevention according to claim 1, wherein one ultrasonic transducer of the two dialysis needles is mounted in the middle of the dialysis needle, and the ultrasonic transducer of the other dialysis needle is mounted near the tip. apparatus.

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