SYRINGE DRIVE DEVICE AND MEDICATION DISPENSING DEVICE

• US 20120071828A1
• Filed: 07/22/2010
• Published: 03/22/2012
• Est. Priority Date: 07/23/2009
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Tojo, Tsuyoshi, Fujioka, Soichiro, Nakamura, Tohru
• Granted Patent: US 8,529,509 B2
• Time in Patent Office: Days
• US Class Current: 604/131
• CPC Class Codes: A61J 1/20 Arrangements for transferring or mixing fluids, e.g. from vial to syringe
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 2005/3125 specific display means, e.g. to indicate dose setting
• 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 5/3148 Means for causing or aiding aspiration or plunger retraction
• CPC Class Codes: A61M 5/486 Indicating injection pressure

Abstract

A syringe drive device 1 includes: a syringe holding section 3; a piston manipulating section 4; and a display section 6. An outer tube 202 of a syringe 201 is detachably held by the syringe holding section 3. A piston 203 of the syringe 201 is detachably engaged with the piston manipulating section 4. The piston manipulating section 4 moves in a direction in response to an operation of operation buttons 8A and 8B, and the piston 203 is thereby moved in a direction where the piston is pushed into or pulled out from the outer tube 202. An internal pressure of a medicinal solution container punctured with an injection needle 204 attached to the outer tube 202 of the syringe 201 is measured and displayed on the display section 6.

Claims

1. A syringe drive device comprising:

a syringe holding section configured to detachably hold an outer tube of a syringe;

a piston manipulating section detachably engaged with a piston of the syringe having an end inserted in the outer tube;

a piston drive section configured to move the piston manipulating section to thereby move the piston in a direction where the piston is pushed into the outer tube or a direction where the piston is pulled out from the outer tube;

a piston controller configured to change the direction where the piston manipulating section is moved by the piston drive section;

an internal pressure measuring section configured to measure an internal pressure of a medicinal solution container punctured with a needle attached to the outer tube of the syringe; and

a display section configured to display the internal pressure of the medicinal solution container measured by the internal pressure measuring section.

2. The syringe drive device as claimed in claim 1, further comprising:

a grip portion extending in a direction intersecting with a longitudinal direction of the outer tube of the syringe held by the syringe holding section; and

an instruction input section used to input an instruction for the piston controller.

3. The syringe drive device as claimed in claim 1, wherein the internal pressure measuring section includes:

a current detecting section configured to detect a drive current of a power source of the piston drive section; and

an internal pressure calculating section configured to calculate the internal pressure of the medicinal solution container based on the drive current detected by the current detecting section.

4. The syringe drive device as claimed in claim 3, further comprising:

a stop adjusting section configured to stop the movement of the piston manipulating section by controlling the drive current of the power source, wherein

the internal pressure calculating section calculates the internal pressure of the medicinal solution container based on the drive current detected by the current detecting section.

5. The syringe drive device as claimed in claim 1, wherein the internal pressure measuring section includes:

a stress detecting section configured to detect a stress received by the piston manipulating section from the piston; and

an internal pressure calculating section configured to calculate the internal pressure of the medicinal solution container based on the stress detected by the stress detecting section.

6. The syringe drive device as claimed in claim 1, further comprising an alarm processing section configured to output an alarm signal when the internal pressure of the medicinal solution container measured by the internal pressure measuring section fails to stay in a predefined numeral range.

7. The syringe drive device as claimed in claim 6, further comprising an alarm section configured to output at least one of sound, vibration and light as an alarm call in response to the alarm signal outputted from the alarm processing section.

8. The syringe drive device as claimed in claim 6, further comprising a piston stop instructing section configured to stop the movement of the piston manipulating section by controlling the piston drive section in response to the alarm signal outputted from the alarm processing section.

9. The syringe drive device as claimed in claim 1, further comprising:

an internal pressure adjusting section configured to move the piston drive section so that the piston moves to a position where the internal pressure of the medicinal solution container measured by the internal pressure measuring section can stay in the predefined numeral range when the internal pressure of the medicinal solution container measured by the internal pressure measuring section fails to stay in the predefined numeral range; and

an internal pressure adjustment instructing section configured to output an instruction to start to adjust the internal pressure to the internal pressure adjusting section.

10. The syringe drive device as claimed in claim 9, wherein

the internal pressure adjusting section requests the piston controller to move the piston manipulating section in the direction where the piston is pulled out from the outer tube when the internal pressure of the medicinal solution container measured by the internal pressure measuring section is equal to or larger than a positive pressure upper-limit value of the predefined numeral range, and

the internal pressure adjusting section requests the piston controller to move the piston manipulating section in the direction where the piston is pushed into the outer tube when the internal pressure of the medicinal solution container measured by the internal pressure measuring section is equal to or smaller than a negative pressure lower-limit value of the predefined numeral range.

11. The syringe drive device as claimed in claim 1, wherein the display section includes a display device which indicates whether the measured internal pressure of the medicinal solution container is included in the predefined numeral range of the internal pressure.

12. The syringe drive device as claimed in claim 11, wherein the predefined numeral range of the internal pressure represents an appropriate range of the internal pressure when the needle of the syringe is pulled out from the medicinal solution container.

13. A medication dispensing device comprising:

a syringe drive device holding section configured to detachably hold the syringe drive device as claimed in claim 1;

a container holding section configured to detachably hold the medicinal solution container;

a movable section provided with the syringe drive device holding section on one end thereof and the container holding section on another end thereof, the movable section being configured to move the syringe drive device and the container holding section toward and away from each other;

a pedestal section configured to rotatably support the movable section between the syringe drive device holding section and the container holding section; and

a rotation drive section configured to rotate the movable section at a first position at which the syringe drive device holding section is positioned on a lower side and the container holding section is positioned on an upper side, and a second position at which the container holding section is positioned on the upper side and the syringe drive device is positioned on the lower side.