Injection device with puncture function, method for controlling injection device with puncture function, chemical solution administration device, and method for controlling chemical solution administration device

• US 20070066938A1
• Filed: 09/19/2006
• Published: 03/22/2007
• Est. Priority Date: 09/20/2005
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Iio, Toshiaki, Amano, Yoshinori
• Granted Patent: US 8,202,249 B2
• Time in Patent Office: Days
• US Class Current: 604/152
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150167 Adjustable piercing speed of skin piercing element, e.g. blade, needle, lancet or canula, for example with varying spring force or pneumatic drive
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150954 Means for the detection of operative contact with patient, e.g. by temperature sensitive sensor
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15123 comprising magnets or solenoids
• CPC Class Codes: A61B 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15132 comprising tooth-shaped elements, e.g. toothed wheel or rack and pinion
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood
• CPC Class Codes: A61M 2005/1402 Priming
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2205/52 : with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2230/201 : Glucose concentration
• CPC Class Codes: A61M 5/14566 : with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/1723 : using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: A61M 5/20 : Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically A61M5/142 , A61M5/46 take precedence; hypodermic projectiles F42B12/54
• CPC Class Codes: A61M 5/24 : Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06

Abstract

An injection device with puncture function includes, in a single casing 30, a cylindrical cartridge 11 in which insulin 12 is enclosed, a cartridge holder 14 to which the cartridge 11 is inserted, a needle 16 inserted at a front end 11a of the cartridge 11, a reciprocation means 32 for reciprocating the cartridge 11 toward the needle 16, and an extrusion means 23 for extruding the insulin 12 from a rear end 11b of the cartridge 11 toward the needle 16, and the motion speed and the motion amount of the reciprocation means 32 are made variable.

Claims

1. An injection device with puncture function comprising, in a single casing:

a cartridge in which a chemical solution is enclosed, said cartridge having a needle inserted at a front end thereof;

a cartridge holder into which the cartridge is inserted;

a reciprocation means for reciprocating the cartridge and the cartridge holder; and

an extrusion means for extruding the chemical solution from a rear end of the cartridge toward the needle;

wherein said reciprocation means reciprocates the cartridge and, at this time, a motion speed and an amount of motion of the reciprocation means are variable, and puncture by the needle or administration of the chemical solution through the needle is carried out.

2. An injection device with puncture function as defined in claim 1 wherein said extrusion means comprises,

a first motor,

a first rotation/linear motion conversion unit which is disposed between a rotation axis of the first motor and a piston that pushes the rear end of the cartridge, and

a first rpm detection unit for detecting a rpm of the first motor.

3. An injection device with puncture function as defined in claim 2 wherein said first rotation/linear motion conversion unit comprises,

a first shaft having an external thread at its surface, and

a baffle-shaped unit to which a first nut having an internal thread that fits the external thread is fixed, said baffle-shaped unit being formed integrally with the piston.

4. An injection device with puncture function as defined in claim 2 wherein said first rpm detection unit comprises,

a first encoder that is connected to the rotation axis of the first motor, and

a first sensor for detecting a rpm of the first encoder.

5. An injection device with puncture function as defined in claim 3 wherein an elastic extension member is inserted between the first shaft and the first nut.

6. An injection device with puncture function as defined in claim 2 wherein said first motor, said first rotation/linear motion conversion unit, and plural gears provided between the first motor and the first rotation/linear motion conversion unit are arranged in a horseshoe shape.

7. An injection device with puncture function as defined in claim 1 wherein said reciprocation means comprises,

a second motor,

a second rotation/linear motion conversion unit which is connected between a rotation axis of the second motor, and a rear end of a frame on which the extrusion means is mounted, and

a second rpm detection unit for detecting a rpm of the second motor.

8. An injection device with puncture function as defined in claim 7 wherein said second rotation/linear motion conversion unit comprises,

a second shaft having an external thread at its surface, and

said frame to which a second nut having an internal thread that fits the external thread is fixed.

9. An injection device with puncture function as defined in claim 7 wherein said second rpm detection unit comprises,

a second encoder that is connected to the rotation axis of the second motor, and

a second sensor for detecting a rpm of the second encoder.

10. An injection device with puncture function as defined in claim 1 wherein

said needle is a hollow needle made of metal, and

said needle serves both as a puncture needle to be used for puncture, and as an administration needle to be used for administration of the chemical solution.

11. An injection device with puncture function as defined in claim 1 wherein said reciprocation means is moved at a high speed by a small distance during puncture, while it is moved at a low speed by a large distance during extrusion of the chemical solution.

12. An injection device with puncture function as defined in claim 1 further including a power supply switch for turning on and off a power supply, said switch being disposed in approximately the center of a casing of the device.

13. An injection device with puncture function as defined in claim 1 further including a touch sensor for detecting that the device touches the skin of a patient, said sensor being disposed next to a puncture needle port through which the needle moves in and out.

14. An injection device with puncture function as defined in claim 1 communicating, with a measurement device that measures a blood glucose level, data of the measured blood glucose level, using a communication means.

15. An injection device with puncture function as defined in claim 14 wherein said communication means performs communication using light.

16. An injection device with puncture function as defined in claim 1 wherein said reciprocation means comprises a magnet and a coil.

17. An injection device with puncture function as defined in claim 16 wherein said reciprocation means includes a linear encoder in addition to the magnet and the coil.

18. An injection device with puncture function as defined in claim 16 wherein said reciprocation means comprises,

a guide pin for guiding a frame on which the extrusion means is disposed so as to move the frame linearly,

a magnet and a coil for driving the frame so as to move the frame linearly, said magnet and coil being attached onto an outer circumference of the frame, and

a linear encoder for detecting a movement distance of the frame.

19. A method for controlling an injection device with puncture function, which controls the puncture operation of the injection device with puncture function defined in claim 1, said method comprising:

a first step of moving the needle forward at a high speed by a small distance, using the reciprocation means;

a second step of moving the needle backward to its original position at a high speed, using the reciprocation means, after the first step;

a third step of setting an amount of extrusion of the chemical solution, after the second step;

a fourth step of moving the needle forward at a low speed by a large distance, using the reciprocation means, after the third step;

a fifth step of extruding the chemical solution from the needle by the amount that is set in the third step, using the extrusion means, after the fourth step; and

a sixth step of moving the needle backward to its original position at a low speed, using the reciprocation means, after the fifth step.

20. The method for controlling an injection device with puncture function as defined in claim 19 further including:

a seventh step of moving the needle forward at a low speed by a large distance using the reciprocation means, between the third step and the fourth step;

an eighth step of extruding air in the cartridge from the needle using the extrusion means, after the seventh step; and

a ninth step of moving the needle backward to its original position at a low speed using the reciprocation means, after the eighth step.

21. A chemical solution administration device comprising, in a single casing:

a connector to which a blood sensor is connected;

an analysis unit for analyzing components in blood, to which a signal inputted to the connector is supplied;

a display unit connected to an output of the analysis unit;

a control unit to which required signals are supplied from an input unit;

an extrusion means having one input to which an output of the control unit is connected, and the other input to which an output of a memory is connected;

a cartridge to which an output of the extrusion means is connected, said cartridge having a chemical solution enclosed therein and a needle inserted at a front end thereof; and

a reciprocation means having one input to which the output of the control unit is connected, and the other input to which the output of the memory is connected;

wherein the output of the analysis unit is connected to the input of the memory to store the analysis result obtained by the analysis unit into the memory, and the output of the reciprocation means is connected to the needle.

22. A chemical solution administration device as defined in claim 21 wherein said extrusion means comprises,

a first motor,

a first rotation/linear motion conversion unit which is disposed between a rotation axis of the first motor and a rear end of the cartridge, and

a first rpm detection unit for detecting a rpm of the first motor.

23. A chemical solution administration device as defined in claim 22 wherein said first rotation/linear motion conversion unit comprises,

a first shaft having an external thread at its surface, and

a first nut which is fixed to a piston, and has an internal thread that fits the external thread.

24. A chemical solution administration device as defined in claim 22 wherein said first rpm detection unit comprises,

a first encoder that is connected to the rotation axis of the first motor, and

a first sensor for detecting a rpm of the first encoder.

25. A chemical solution administration device as defined in claim 23 wherein an elastic extension member is inserted between the first shaft and the first nut.

26. A chemical solution administration device as defined in claim 22 wherein said first rotation/linear motion conversion unit is arranged in a horseshoe shape.

27. A chemical solution administration device as defined in claim 21 wherein said reciprocation means comprises,

a second motor,

a second rotation/linear motion conversion unit which is connected between the second motor and a frame, and

a second rpm detection unit for detecting a rpm of the second motor.

28. A chemical solution administration device as defined in claim 27 wherein said second rotation/linear motion conversion unit comprises,

a second shaft having an external thread at its surface, and

a second nut which is fixed to the frame, and has an internal thread that fits the external thread.

29. A chemical solution administration device as defined in claim 27 wherein said second rpm detection unit comprises,

a second encoder that is connected to the rotation axis of the second motor, and

a second sensor for detecting a rpm of the second encoder.

30. A chemical solution administration device as defined in claim 27 wherein

said needle is a hollow needle made of metal, and

said needle serves both as a puncture needle to be used for puncture, and as an administration needle to be used for administration of the chemical solution.

31. A chemical solution administration device as defined in claim 21 wherein an insertion port into which a blood sensor is inserted is provided on an outer wall of the casing, said outer wall being different from a wall where a puncture needle port through which the needle goes in and out is provided.

32. A chemical solution administration device as defined in claim 21 wherein said reciprocation means is moved at a high speed by a small distance during puncture, while it is moved at a low speed by a large distance during extrusion of the chemical solution.

33. A chemical solution administration device as defined in claim 21 further including a power supply switch for turning on and off a power supply, said switch being disposed in approximately the center of the casing.

34. A chemical solution administration device as defined in claim 21 further including a touch sensor for detecting that the device touches the skin of a patient, said sensor being disposed next to a puncture needle port through which the needle goes in and out.

35. A method for controlling the chemical solution administration device defined in claim 21 comprising:

a blood collection step of collecting blood;

a measurement step of analyzing the collected blood, after the blood collection step;

a storage step of storing data measured by the measurement step into a memory, after the measurement step; and

an administration step of administrating a chemical solution after the storage step.

36. A control method as defined in claim 35 wherein an air releasing step is inserted before the administration step.

37. A control method as defined in claim 35 wherein a correction step of correcting the data measured in the measurement step is inserted after the storage step.

38. A control method as defined in claim 35 wherein, after administration of the chemical solution is carried out in the administration step, the needle is moved backward when a predetermined waiting time has passed.