JP2009297405A - Device for preventing needle detachment and for detecting inserting direction - 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: 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. An oscillator 13 is connected to the ultrasonic transducer 9 on one dialysis needle 7 out of the dialysis needles 7, 8, and a signal detecting device 14 is connected to the ultrasonic transducer 10 on the other dialysis needle 8 out of the dialysis needles 7, 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a needle removal prevention and insertion direction detection device capable of preventing a dialysis needle from coming out of a blood vessel and detecting an incorrect insertion direction.

  Conventionally, as shown in FIG. 5, a dialysis needle leakage sensor has electrodes 2, 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, 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.

  The present invention includes two dialysis needles connected to an artificial dialysis machine each equipped with an ultrasonic vibrator, an oscillator connected to the ultrasonic vibrator of one of the two dialysis needles, and the oscillator In order to detect the ultrasonic wave irradiated by the oscillation output inputted to the ultrasonic vibrator of one of the dialysis needles, it is connected to the ultrasonic vibrator attached to the other dialysis needle of the two dialysis needles When the ultrasonic wave irradiated from the ultrasonic vibrator of the one dialysis needle is not detected by the ultrasonic vibrator attached to the other dialysis needle, the needle removal of the dialysis needle is prevented. A second detector is connected to the ultrasonic transducer of the one dialysis needle, and a second oscillator is connected to the ultrasonic transducer attached to the other dialysis needle, Wave reception when the one dialysis needle is inserted in the direction of blood flow No. and by the other dialysis needle is detected in each of the signal detection apparatus wherein a received signal when it is inserted in the flow direction opposite to the blood vessel, is to determine the correct direction of insertion of dialysis needles.

  In the needle omission prevention and insertion direction detection device of the present invention, an oscillation output is applied from an oscillator to an ultrasonic vibrator mounted on one of two dialysis needles, and irradiation is performed from the ultrasonic vibrator of one dialysis needle. The detected ultrasonic wave is detected by a signal detector connected to the ultrasonic transducer attached to the other dialysis needle through the blood vessel, so that the ultrasonic wave emitted from the ultrasonic transducer of one dialysis needle is signal-detected. If it is not detected by the device, the needle dropout is detected immediately, and an oscillator is connected to each of the ultrasonic transducers of the two dialysis needles, and a signal detection device is connected to each of the ultrasonic transducers of the two dialysis needles. By connecting, the received signal when one dialysis needle is inserted in the direction of blood flow and the received signal when the other dialysis needle is inserted in the direction opposite to the direction of blood flow are the respective signal detection devices. Dialysis by detecting with There is an advantage that it is possible to determine the correct insertion direction.

  In the present invention, an ultrasonic vibrator is attached to each of two dialysis needles connected to an artificial dialysis machine, an oscillator is connected to one ultrasonic vibrator, and a signal detection device is connected to the other ultrasonic vibrator. When the received signal is not detected by detecting the ultrasonic wave irradiated from the ultrasonic transducer of one dialysis needle with the signal detector of the other ultrasonic transducer, the needle from the blood vessel of the dialysis needle This is to detect missing.

  FIG. 1 is a block diagram of a needle drop prevention and insertion direction detection device according to an embodiment of the present invention. The dialysis needles 7 and 8 have ultrasonic transducers 9 and 10 mounted in the middle, respectively. Each is connected to a dialysis machine 11, the other end is inserted into a blood vessel 12, an oscillator 13 is connected to the ultrasonic vibrator 9 of one of the dialysis needles 7, 8, and the other dialysis of the dialysis needles 7, 8 is connected. A signal detection device 14 is connected to the ultrasonic transducer 10 of the needle 8.

  In the needle omission prevention device of the present embodiment configured as described above, first, when an oscillation output is applied from the oscillator 13 to the ultrasonic vibrator 9 of one dialysis needle 7, the dialysis needle 7 inserted into the blood vessel 12. , 8 is not removed from the blood vessel 12, the ultrasonic wave irradiated from the ultrasonic vibrator 9 is transmitted to the dialysis needles 7, 8, transmitted to the ultrasonic vibrator 10, and connected to the ultrasonic vibrator 10. 2 is detected after the oscillation line A in FIG. 2, and it is informed that there is no abnormality.

  Here, as shown in FIG. 2, when either one of the dialysis needles 7 and 8 is removed, the received wave B of the ultrasonic wave transmitted through the blood vessel 12 is not detected by the signal detection device 14, so that this ultrasonic wave As soon as B is no longer detected by the signal detection device 14, a buzzer or the like reporting an abnormality is reported from the signal detection device 14.

  FIG. 3 is a block diagram of a needle omission prevention and insertion direction detection device according to another embodiment of the present invention. 7, 8 are dialysis needles, 9, 10 are ultrasonic vibrators, 11 is a dialysis machine, 12 is a blood vessel, Is an oscillator, and 14 is a signal detection device. Since these configurations are the same as those in the above embodiment, the description is omitted. In this embodiment, a signal detection device 15 is connected to the ultrasonic transducer 9, and An oscillator 16 is connected to the ultrasonic transducer 10.

  In the needle omission prevention and insertion direction detection device of this embodiment configured as described above, first, when an oscillation output is applied from the oscillators 13 and 16 to the ultrasonic vibrators 9 and 10 of the dialysis needles 7 and 8, In a state where the dialysis needles 7 and 8 inserted into the blood vessel 12 do not come out of the blood vessel 12, the ultrasonic waves irradiated from the ultrasonic vibrators 9 and 10 are transmitted to the ultrasonic vibrators 9 and 10 through the blood vessel 12, respectively. Therefore, it is detected by the signal detection devices 15 and 14 connected to the ultrasonic transducers 9 and 10, and the ultrasonic reception wave B is detected after the oscillation line A in FIG. Is informed.

   Here, when either one of the dialysis needles 7 and 8 is removed, the ultrasonic reception wave B transmitted through the blood vessel 12 is not detected by the signal detection devices 15 and 14. When the signal detectors 15 and 14 are no longer detected, the signal detector 15 or 14 immediately reports a buzzer or the like that notifies the abnormality.

  3, when an oscillation output is applied to the ultrasonic vibrator 9 from the oscillator 13 connected to the ultrasonic vibrator 9 attached to the dialysis needle 7, the ultrasonic vibrator 9 to the dialysis needle 7. The ultrasonic wave is irradiated to the blood vessel 12 via the signal, and the received signal is detected by the signal detection device 15, and as shown in the waveform of FIG. When the oscillation output is detected and applied to the ultrasonic vibrator 10 from the oscillator 13 connected to the ultrasonic vibrator 10 attached to the dialysis needle 8, the ultrasonic vibrator 10 passes through the dialysis needle 8. The blood vessel 12 is irradiated with ultrasonic waves, and the received signal is detected by the signal detection device 15. As shown in FIG. 4B, the ultrasonic wave reception B1 is detected after the oscillation line A1, and the forward direction and In the reverse direction, the transmission time of the ultrasonic reception waves B and B1 is shifted.

  Therefore, before starting dialysis, the dialysis needles 7 and 8 are inserted into the blood vessel 12, and the oscillation output is applied to the oscillators 13 and 16 connected to the ultrasonic vibrators 9 and 10 of the dialysis needles 7 and 8, respectively. 4A and 4B, when the received signals B and B1 of the ultrasonic waves are generated with respect to the oscillation waves A and A1 by detecting the received signals from the detectors 15 and 14, respectively. In FIGS. 4 (a) and 4 (b), when the ultrasonic reception waves B and B1 are not emitted with respect to the oscillation waves A and A1, the needle is removed, and FIGS. 4 (a) and 4 (b). In FIG. 5, when the ultrasonic wave B is emitted in the opposite direction of B1 with respect to the oscillation waves A and A1, it is normal that the dialysis needles 7 and 8 are inserted by inserting the blood vessels 12 in reverse. By doing so, the burden on the patient is reduced.

  The needle drop prevention and insertion direction detection device of the above embodiment can be used to prevent needle drop such as blood transfusion and infusion.

It is a block diagram of the needle omission prevention and insertion direction detection apparatus of the Example of this invention. FIG. 2 is a reception waveform diagram of ultrasonic waves detected by the ultrasonic transducer of FIG. 1. It is a block diagram of the needle | hook removal prevention and insertion direction detection apparatus of the other Example of this invention. FIG. 4 is a reception waveform diagram of ultrasonic waves detected by the ultrasonic transducer of FIG. 3. 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, 16 Oscillator 14, 15 Signal detection device

Claims (2)

  Two dialysis needles connected to an artificial dialysis machine each equipped with an ultrasonic vibrator, an oscillator connected to an ultrasonic vibrator of one dialysis needle of the two dialysis needles, and one dialysis from the oscillator A signal detection device connected to an ultrasonic transducer attached to the other dialysis needle of the two dialysis needles in order to detect the ultrasonic wave irradiated by the oscillation output input to the ultrasonic transducer of the needle; And detecting the needle omission of the dialysis needle when the ultrasonic wave irradiated from the ultrasonic transducer of the one dialysis needle is not detected by the ultrasonic transducer attached to the other dialysis needle. A feature of preventing needle dropout and insertion direction detection.   A second detection device is connected to the ultrasonic transducer of the one dialysis needle, a second oscillator is connected to the ultrasonic transducer attached to the other dialysis needle, and the one dialysis needle is connected to the blood vessel. Correct detection of the dialysis needle by detecting the received signal when the other dialysis needle is inserted in the flow direction and the received signal when the other dialysis needle is inserted in the direction opposite to the blood flow direction. The needle removal prevention and insertion direction detection device according to claim 1, wherein the direction is determined.

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