JP2006175191A - Manual or automatic syringe and its equivalent medical appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual or automatic syringe or its equivalent medical appliance capable of easily and accurately finding a vein, equipped with a diffusion-type semiconductor pressure sensor which can perform an injection, a blood transfusion, a blood collection, an intravenous drip injection, a contrast injection, or the like without giving piercing or other pains to a patient. <P>SOLUTION: When a needle tip of this syringe for transmitting the blood flow of a vein has pierced the vein, the diffusion-type semiconductor pressure sensor 6 for responding to the vascular pressure therein is attached to an appropriate position on the syringe. The pressure strain in a diagram on sensing elements depending on the blood flow transmitted from a pressure port P of the above-mentioned sensor is converted into resistance variations in the strain gauge, and then these variations are taken out in a form of electric signals. These feeble signals are received by a wireless 9 or wired receiver to be amplified, and converted into visible or audible signals, so that the sensor can recognize the penetration of the needle into the vein. Then, it starts performing such medical treatments as the injection, the blood transfusion, the blood collection, and the intravenous drip injection by manipulating the piston of the sylinge. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

Detailed Description of the Invention

    The present invention comprises a manual or automatic injector or its equivalent medical device, more specifically a diffusion type semiconductor pressure sensor sensitive to blood flow, and pressure distortion due to blood transmitted to this is converted into an electrical signal at its output terminal. Manually, configured to perform subsequent medical processing without deriving blood backflow according to this signal, captured by a wireless or wired receiver, converted into a visible or audible signal The present invention relates to a medical instrument such as an automatic syringe.

      Conventionally, in pharmaceutical injection, blood collection, blood transfusion, etc., the upper arm is generally tightened with a rubber band to lift the vein, and an injection needle is inserted into this for injection or blood collection, but depending on the person In patients who do not easily see veins and are constantly injecting, the skin or blood vessels harden and the needles are difficult to pass, and inexperienced medical workers have difficulty in treatment, and for patients, needle sticks are difficult. It was repeated and sometimes felt frightened and even a painful treatment.

In order to eliminate such difficulties or pains, only a hypodermic syringe has been proposed in the past. For example, in the injection of diabetic patients, the following special syringes have been proposed.
Japanese Patent Application 2000-60969

      However, the technology of the above Japanese Patent Application No. 2000-60969 relates to a portable automatic injector and an injection unit for diabetic patients, and an enzyme body (302) attached to the tip of an injection needle (3-11), for example, glucosoxyta. When Z is pierced under the patient's skin together with the injection needle, it forms a charge according to the blood glucose level of the cortex and passes through the conductors (305) (306) of the sucrose sensor (307). After being taken out as an electric current and amplified by an amplifier (311), the microcomputer and the motor are driven to drive the syringe at a necessary speed. (See FIGS. 27, 28 and 29)

Therefore, it cannot be used for medical activities such as intravenous injection, blood transfusion, blood collection, drip, contrast injection, etc., which is the most frequently used drug solution. .
An object of the present invention is to overcome the disadvantages and inconveniences of this kind of intravenous injection and increase the medical use efficiency.

Means to solve the problem

        In order to solve such a problem, in the present invention, a diffusion type semiconductor pressure sensor sensitive to a blood flow to be changed to a simple sucrose injection is attached to an appropriate position inside and outside the syringe cylinder to which the blood flow is transmitted. When the blood flow is transmitted, the change in strain of the electrode on the sensing element corresponding to the change in the strain resistance of the diaphragm of the sensing element depending on the pressure is captured as an electrical signal, and this change is received by wired or wireless reception outside the syringe. It is received by a machine, converted into a visible or audible signal, and the contact state of the injection needle with the venous blood flow is confirmed accurately, and the use of a medical device such as injection and blood collection after sputum is performed smoothly and accurately. It is characterized by having been configured.

The invention's effect

        Therefore, if the operation of a visible or audible signal on a syringe is confirmed by inserting a needle into a specific blood vessel part of the human body, for example, one vascular vein of the upper arm, only medical treatment is performed after sputum. , Technical superiority and inferiority are irrelevant, and discrimination based on the patient's body shape, constitution or medical history, for example, discrimination of blood vessels and difficulty of needle insertion, or technical discrimination due to epithelial hardening for repeated needle insertion It can be ignored, and both the pain and pain of the patient's treatment due to discrimination such as the thickness and thinness of the blood vessels and the degree of relief can be removed.

        In addition, it eliminates the need for beginners' education, practical training, training, etc., and allows them to concentrate on their duties, while at the same time saving rubber bands, extra injection needles, disinfectants, gauze, etc. Medical personnel costs and expenses will be reduced.

        In addition, the production technology of this kind of sensor in recent years has been remarkably improved, and various sizes and shapes are provided, and both manual and automatic syringes using this kind of sensor are relatively inexpensive. Therefore, it is believed that the economic effect of the present invention in the medical device industry is extremely large.

BEST MODE FOR CARRYING OUT THE INVENTION

As described above, the syringe, blood collection device, etc. of the present invention is an extremely small diffusion type semiconductor pressure sensor that can be sensitive to a weak flow of blood, etc., at a location where blood fluid such as a syringe, blood collection device, etc. is transmitted. Attached, the distortion change of the diaphragm due to the pressure of the blood flow is captured as a change in the resistance value of the electrode, and this minute change is taken out as an external electric signal and converted into a light visible signal or an audible signal after amplification. Since the signal generation itself is at the time when the blood vessel tip of the needle tip is pierced, the needle tip of the vein tip at a fixed position of the body is the presence or absence of technology Because it can be easily performed regardless of blood flow, it is possible to accurately perform the treatment without blood regurgitation.
Such medical effects and benefits can be obtained only by using a syringe or the like of this kind of pressure sensor.
Several preferred embodiments of the manual or automatic injector of the present invention will be described below with reference to the drawings.

      The manual or automatic syringe or equivalent medical device (1) with a diffusion type semiconductor pressure sensor of the present invention is mainly composed of a syringe cylinder (2), a piston (3), a syringe needle (4), as usual. These syringe main parts and integral or individual signal part (12) are comprised.

      In this cylinder (2), a stopcock (8) made of an appropriate material is fitted with a pore (8 ') on the inner side of the nearest tip where blood flow is transmitted. A semiconductor pressure sensor (6) is mounted on the upper surface.

      As shown in FIGS. 2 and 3, this semiconductor pressure sensor (6) is provided with a single pressure inlet (pressure port) (P) on the upper surface of the outer container (14), and the pressure of blood flow. Is transmitted to the sensing element (S) from the direction of the arrow, and the diaphragm (15) is deformed, and this deformation is transmitted to the strain gauge provided on the surface, and finally the strain of the strain gauge is deformed. The electric signal is extracted from the conductor (7).

      Thus, the electrical signals from the conductors (7) and (7) are received by the receiving section (9) of the wireless receiver (12) provided separately from the syringe (1) and amplified by the amplifier (10). Then, it is taken out as a light signal from the visible signal device (11), and according to this signal, the syringe piston (3) is pulled up in the (F) direction to collect blood.

      In this way, the blood reaches the pressure port (10) through the injection needle (4) pierced through the vein (8) and its insertion port (5), and transmits a signal as described above. After that, the blood is sucked and drawn through the stopcock (8) into the cylinder (2).

FIG. 4 shows a blood collection device (41) of a wired reception system that replaces the wireless pressure sensor-electrical signal reception system of FIG.
In this blood collection device (41), a diffusion type semiconductor pressure sensor (46) similar to the above is mounted on the outer tip of the piston (43), and the injection needle (44) and its insertion port (45). ) Through which blood flows from the direction of the arrow to generate an electrical signal, which passes through the cord wire (47) and its terminal (48), receiver (49), and amplifier (50) as an optical signal (51). After confirming this signal, the piston (43) is pulled up in the direction of arrow (F) and blood is collected.

FIG. 5 shows a portable syringe (61) with a microfluid injection pump in which an ultra-small diffusion type semiconductor pressure sensor (66) is mounted on the outer or inner tip of a drug solution or blood injection cylinder.
This syringe pump syringe (61), as usual, contains a computer-controlled small electric motor therein, and a piston that is screw-driven in the syringe cylinder (62) by driving the electric motor. According to the minute movement, the liquid medicine or blood is accurately injected. The injection movement is started by the semiconductor pressure sensor (66) similar to the above embodiments (1) and (2). As shown in FIG. 6, for example, as shown in FIG. 6, a connector-connecting portion (63) between the syringe cylinder (62) and the syringe needle connecting tube (65) or the syringe cylinder ( 62) is attached to the inner tip (not shown).

        In its use, a butterfly needle (68) connected to a syringe cylinder (62) filled with an appropriate injection solution is first inserted into or near the patient's vein to locate the blood vessel. When it is pierced and blood flow is transmitted to the pressure sensor (66) in the connector (65) through the tube (67), the electric power output from the sensor is output as described above. The signal is received via a wireless or wired receiver (not shown) and is converted into an optical signal from a visible signal device (69) to alert.

        The operator who has received this signal presses the drive button (71) of the syringe motor (not shown) of the meter section (64) to start the injection, and the cylinder (62) and the piston which swings are connected to the gear and the piston. While adjusting the injection speed with a screw, it is configured to automatically inject a minute amount of liquid medicine or blood and press the button (72) to complete the medical action.

        Thus, the syringes (1), (41) and (61) of the present invention with wireless, wired or manual or automatic diffusion type semiconductor pressure sensor (1), (41) and (61) are the patient's constitution, figure, medical history and treatment experience. It is possible to find veins easily and accurately regardless of, etc., and at the same time, without backflow of blood, it can also be applied to medical instruments such as drug injection, blood transfusion, blood collection, infusion, contrast injection, etc. The economic effect is estimated to be very large in Japan alone, and in addition, it is possible to concentrate on the respective duties by eliminating the time and effort of therapists, such as medical staff, technical training, training, etc. Since it can avoid the pain and fear of needle piercing, it can be considered that its utility value is so great that it cannot be measured.

It is a partial cutaway perspective view of the manual injection device with a diffusion type semiconductor pressure sensor of the present invention. It is a cutaway perspective view of the diffusion type semiconductor pressure sensor used for the syringe. It is the cutting | disconnection top view cut | disconnected along line AA of FIG. It is a cutting | disconnection front view which shows the other aspect of the manual injection device of this invention. FIG. 6 is a partially cut perspective view of an automatic injector according to still another embodiment of the present invention. FIG. 6 is a partially cut front view of the automatic injector of FIG. 5.

Explanation of symbols

1 Manual syringe with diffusion type semiconductor pressure sensor 2 Cylinder
3 Piston 4 Injection needle 6 Diffusion type semiconductor pressure sensor
7 Electrical signal lead wire 8 Stopcock P Pressure port 9 Wireless receiver 10 Amplifier 11 Visible signal

Claims (3)

          In a manual or automatic syringe or an equivalent medical device, a semiconductor pressure sensor that is sensitive to blood flow applied to the needle tip is attached to a place where blood flow is transmitted, such as the syringe, and the sensor is controlled by the blood flow. An electrical signal induced in the output unit is converted into a visible or a sensible signal, and after confirming this signal, medical procedures such as blood collection and infusion are started without deriving blood backflow. Features medical equipment.           2. The medical device according to claim 1, wherein the pressure sensor is attached to a distal end portion inside or outside the cylinder of the syringe or the equivalent medical device or an outer front end portion of a piston.           3. The medical device according to claim 1, wherein an electrical signal induced on the output side of the pressure sensor is received by a wireless or wired receiving means and converted into a visible or audible signal.

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