METHOD AND SYSTEM FOR CONTROLLABLY ADMINISTERING FLUID TO A PATIENT AND/OR FOR CONTROLLABLY WITHDRAWING FLUID FROM THE PATIENT

• US 20160030663A1
• Filed: 03/17/2014
• Published: 02/04/2016
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Medovate Limited
• Original Assignee: Concert Medical, LLC
• Inventors: Donnelly, Howard, Adaniya, George, Mathews, Eric, Taylor, Hayden, Whitehead, Andrew
• Granted Patent: US 10,420,882 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 19/00 Local anaesthesia syringes therefor A61M5/00; Hypothermia A61M5/42 takes precedence; cooling blood in a bypass of the arterial system A61M1/36
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14232 Roller pumps
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/1452 pressurised by means of pistons
• CPC Class Codes: A61M 5/14526 the piston being actuated by fluid pressure
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• 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

Abstract

Method and system for controllably administering and/or withdrawing fluid from a patient. In one embodiment, the system may include a needle assembly, an ultrasound imager, a fluid supply storage unit, a waste storage unit, a fluid pump, and a foot pedal assembly. A syringe may serve as the fluid supply storage unit and the waste storage unit. The pump may include a bi-directional motor and a gear coupled to the motor. The gear may be engageable with a rack on the syringe plunger to drive the plunger either for fluid aspiration or infusion. Depression of one portion of the foot pedal assembly causes the motor to drive the gear in one direction, and depression of another portion of the foot pedal assembly causes the motor to drive the gear the other direction. The system may include a control device to keep pressure in the fluid path from exceeding a limit.

Claims

1. A system for controllably administering fluid to a patient and/or for controllably withdrawing fluid from the patient, the system comprising:

a. an infusion needle;

b. a pump adapted to be operably coupled to the infusion needle for creating fluid flow through the infusion needle; and

c. a hands-free switch for activating and/or deactivating the pump.

2. The system as claimed in claim 1 further comprising a container for holding a quantity of fluid, the container being in fluid communication with the infusion needle.

3. The system as claimed in claim 2 wherein the container is a syringe.

4. The system as claimed in claim 3 wherein the pump is positioned between the syringe and the infusion needle.

5. The system as claimed in claim 4 wherein the pump is a peristaltic pump.

7. The system as claimed in claim 3 wherein the syringe comprises a syringe body and a syringe plunger and wherein the pump drives movement of the syringe plunger relative to the syringe body.

8. The system as claimed in claim 7 wherein the pump is a pneumatic pump.

9. The system as claimed in claim 7 wherein the pump comprises a gear and the syringe plunger comprises a rack drivable by the gear.

10. The system as claimed in claim 9 wherein the syringe is removably connectable to the pump.

11. The system as claimed in claim 4 wherein the pump is a piston pump.

12. The system as claimed in claim 11 wherein the piston pump comprises a piston for which the piston force is limited mechanically via a compression spring.

13. The system as claimed in claim 1 wherein the pump is a bi-directional pump capable of alternately producing positive and negative fluid flow in the infusion needle.

14. The system as claimed in claim 1 wherein the hands-free switch is a foot-controllable switch.

15. The system as claimed in claim 14 wherein the foot-controllable switch comprises a resiliently-compressible tube and a pressure-sensitive switch disposed within a void of the resiliently-compressible tube.

16. The system as claimed in claim 1 wherein the pump comprises a cloth grabber for use in immobilizing the pump.

17. The system as claimed in claim 1 further comprising a control device for automatically preventing the fluid pressure in the infusion needle from exceeding a predetermined threshold.

18. The system as claimed in claim 17 wherein the predetermined threshold is approximately 10 psi to 20 psi.

19. The system as claimed in claim 17 wherein the control device comprises a pressure relief valve that bleeds fluid when the fluid pressure approaches the predetermined threshold.

20. The system as claimed in claim 3 wherein the fluid within the syringe has a fluid pressure, wherein the pump comprises a motor, the motor drawing a motor current, and wherein the motor current is proportional to the fluid pressure within the syringe, the system further comprising a control device for preventing the fluid pressure within the syringe from exceeding a maximum value, the control device comprising circuitry that senses the current of the motor and that controls the motor based on the sensed current of the motor.

21. The system as claimed in claim 17 wherein the control device comprises a pressure sensor and a switch for cutting off power to the pump when the fluid pressure exceeds the predetermined threshold.

22. The system as claimed in claim 21 further comprising a syringe for holding a quantity of fluid, the syringe being in fluid communication with the infusion needle and comprising a syringe body, a syringe plunger, and a seal, wherein the seal is deformable by fluid pressure, and wherein the pressure sensor comprises a first component coupled to the syringe plunger and a second component coupled to the seal.

23. The system as claimed in claim 21 wherein the control device further comprises means for continuously measuring and reporting one or more fluid characteristics.

24. The system as claimed in claim 17 wherein the control device comprises a maximum torque limiter.

25. The system as claimed in claim 24 wherein the maximum torque limiter comprises a current sensor, a resistor and a shutoff switch.

26. The system as claimed in claim 1 wherein the pump comprises a DC motor, the system further comprising at least one battery for power the DC motor.

27. A method for controllably administering fluid to a patient and/or for controllably withdrawing fluid from the patient, the method comprising:

a. providing the system of claim 1;

b. positioning the infusion needle at a desired location within the patient;

c. using the hands-free switch to activate and to deactivate the pump.

28. The method as claimed in claim 27 wherein the system further comprises a control device for automatically preventing the fluid pressure in the infusion needle from exceeding a predetermined threshold.

6. (canceled)

29. (canceled)

30. (canceled)

31. (canceled)

32. A kit comprising:

a. a first container;

b. a syringe disposed within the first container;

c. a pump disposed within the first container, the pump being adapted to pump fluid into and/or out of the syringe; and

d. a foot pedal adapted for operating the pump.

33. (canceled)

34. (canceled)

35. (canceled)

36. A system for controllably administering fluid to a patient and/or for controllably withdrawing fluid from the patient, the system comprising:

a. a syringe, the syringe comprising a syringe body and a syringe plunger;

b. an infusion needle, the infusion needle being operatively coupled to the syringe;

c. a pump, the pump comprising a motor and a gear, the gear being engageable with the syringe plunger to drive movement of the syringe plunger relative to the syringe body;

d. an adaptor for selectively engaging the gear and the syringe plunger; and

e. a hands-free switch for activating and/or deactivating the motor.

37. The system as claimed in claim 36 wherein the hands-free switch comprises a resiliently-compressible tube and a pressure-sensitive switch disposed within a void of the resiliently-compressible tube.

38. The system as claimed in claim 36 further comprising a control device for automatically preventing the fluid pressure in the infusion needle from exceeding a predetermined threshold.

39. The system as claimed in claim 38 wherein the predetermined threshold is approximately 10 psi to 20 psi.

40. The system as claimed in claim 38 wherein the control device comprises a pressure sensor and a switch for cutting off power to the pump when the fluid pressure exceeds the predetermined threshold.

41. The system as claimed in claim 40 further comprising a syringe for holding a quantity of fluid, the syringe being in fluid communication with the infusion needle and comprising a syringe body, a syringe plunger, and a seal, wherein the seal is deformable by fluid pressure, and wherein the pressure sensor comprises a first component coupled to the syringe plunger and a second component coupled to the seal.

42. The system as claimed in claim 40 wherein the control device further comprises means for continuously measuring and reporting one or more fluid characteristics.

43. The system as claimed in claim 38 wherein the control device comprises a maximum torque limiter.

44. The system as claimed in claim 43 wherein the maximum torque limiter comprises a current sensor, a resistor and a shutoff switch.