Partial venting system for occlusion surge mitigation

Patent metadata

Field	Value
Publication number	US-2017087283-A1
Application number	US-201615373040-A
Country	US
Kind code	A1
Filing date	Dec 8, 2016
Priority date	Apr 26, 2013
Publication date	Mar 30, 2017
Grant date	—

Abstract

A surgical system comprises a hand piece, an irrigation conduit in fluid communication with the hand piece to carry fluid toward a surgical site, an aspiration conduit in fluid communication with the hand piece to carry fluid away from the surgical site, a pump interfacing with the aspiration conduit, the pump to create a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit, a vacuum relief valve in fluid communication with the aspiration conduit to relieve the vacuum pressure in the aspiration conduit, a pressure sensor to detect a pressure associated with the surgical site, a controller in communication with the vacuum relief valve and the pressure sensor to control the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit when the pressure detected by the pressure sensor is less than a first pressure threshold.

First claim

1 .- 24 . (canceled)

25 . A surgical system comprising:
a hand piece; an aspiration conduit in fluid communication with the hand piece and configured to carry fluid away from a surgical site; a pump interfacing with the aspiration conduit, the pump configured to create a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit; a vacuum relief valve in fluid communication with the aspiration conduit and configured to relieve the vacuum pressure in the aspiration conduit; a first pressure sensor disposed and configured to detect a pressure associated with the surgical site; a second pressure sensor located along the aspiration conduit, the second pressure sensor configured to monitor an aspiration pressure within the aspiration conduit; and a controller having a first pressure threshold and a second pressure threshold stored therein and being in communication with the vacuum relief valve, the first pressure sensor, and the second pressure sensor, the controller being configured to control the vacuum relief valve to open the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit when the pressure detected by the first pressure sensor is less than the first pressure threshold, and the controller being configured to control the vacuum relief valve to close the vacuum relief valve after a period of time, wherein the period of time that the vacuum relief valve is opened is correlated to a difference between the first pressure threshold and the pressure detected by the second pressure sensor.

26 . The system of claim 25 , wherein the first pressure sensor is located on the hand piece.

27 . The system of claim 25 further comprising
an irrigation conduit in fluid communication with the hand piece and configured to carry irrigation fluid toward a surgical site;

28 . The system of claim 27 wherein the first pressure sensor is an irrigation conduit pressure sensor located along the irrigation conduit to detect an irrigation pressure within the irrigation conduit.

29 . The system of claim 25 , further comprising a vent reservoir and a bypass conduit bypassing the pump and in fluid communication with the aspiration conduit and the vent reservoir, wherein the vacuum relief valve is located along the bypass conduit, and wherein the vent reservoir is in fluid communication with the aspiration conduit.

30 . The system of claim 29 , wherein the vacuum relief valve is configured to allow a vent reservoir fluid to enter the bypass conduit when the vacuum relief valve decreases the vacuum pressure in the aspiration conduit.

31 . The system of claim 25 , wherein the second pressure sensor is located between the pump and the surgical site.

32 . The system of claim 25 , wherein the first pressure sensor is disposed less than about 12 inches from the surgical site.

33 . The system of claim 25 wherein the vacuum relief valve is controlled to partially open to an angular position of less than 45 degrees.

34 . The system of claim 25 wherein the vacuum relief valve is controlled to partially open to an angular position of less than 30 degrees.

35 . A surgical system comprising:
a hand piece; an aspiration conduit in fluid communication with the hand piece and configured to carry fluid away from a surgical site; a pump interfacing with the aspiration conduit, the pump configured to create a vacuum pressure in the aspiration conduit to draw fluid through the aspiration conduit; a vacuum relief valve in fluid communication with the aspiration conduit and configured to relieve the vacuum pressure in the aspiration conduit; a pressure sensor disposed and configured to detect a pressure associated with the surgical site; and a controller having a pressure threshold stored therein and being in communication with the vacuum relief valve and the pressure sensor, the controller being configured to control the vacuum relief valve to open the vacuum relief valve to decrease the vacuum pressure in the aspiration conduit when the pressure detected by the pressure sensor is less than the pressure threshold, and the controller being configured to control the vacuum relief valve to close the vacuum relief valve after a predetermined period of time, wherein the predetermined period that the vacuum relief valve is opened is sufficient to reduce the vacuum pressure created by an occlusion of the aspiration conduit.

36 . The system of claim 35 wherein the vacuum relief valve is pulsed between an open and closed position during the predetermined period of time.

37 . The system of claim 35 , wherein the pressure sensor is located on the hand piece.

38 . The system of claim 35 , further comprising a vent reservoir and a bypass conduit bypassing the pump and in fluid communication with the aspiration conduit and the vent reservoir, wherein the vacuum relief valve is located along the bypass conduit, and wherein the vent reservoir is in fluid communication with the aspiration conduit.

39 . The system of claim 35 , wherein the pressure sensor is disposed less than about 12 inches from the surgical site.

40 . The system of claim 35 wherein the vacuum relief valve is controlled to partially open to an angular position of less than 45 degrees.

41 . The system of claim 35 wherein the vacuum relief valve is controlled to partially open to an angular position of less than 30 degrees.

42 . A method of operating an aspiration system, comprising:
directing a fluid through an aspiration conduit in fluid communication with a hand piece; creating a vacuum pressure within the aspiration conduit using a pump interfacing with the aspiration conduit to draw an aspiration fluid from a surgical site and into the aspiration conduit; detecting with a first pressure sensor a pressure associated with the surgical site; detecting an aspiration pressure with a second pressure sensor located along the aspiration conduit; and decreasing the vacuum pressure in the aspiration conduit by controlling a vacuum relief valve such that the vacuum relief valve is opened to vent the vacuum pressure when the pressure associated with the surgical site is less than a first pressure threshold, and controlling the vacuum relief valve such that the vacuum relief valve is closed when the aspiration pressure is greater than a second pressure threshold, wherein a duration that the vacuum relief valve is opened is correlated to a difference between the first pressure threshold and the aspiration pressure.

43 . The method of claim 42 , wherein the first pressure sensor is located on the hand piece.

44 . The method of claim 42 , further comprising:
directing a fluid through an irrigation conduit in fluid communication with the hand piece; wherein the first pressure sensor is an irrigation pressure sensor located along the irrigation conduit detecting an irrigation conduit pressure.

45 . The method of claim 42 , further comprising:
controlling the vacuum relief valve with a controller, wherein the controller is connected to the first pressure sensor and the second pressure sensor and the controller is configured to receive information from the first pressure sensor and the second pressure sensor.

46 . The method of claim 42 , wherein the vacuum relief valve is located on a bypass conduit that bypasses the pump and is in fluid communication with the aspiration conduit and a vent reservoir, and wherein the vent reservoir is in fluid communication with the

Assignees

• Novartis Ag

Inventors

• Ovchinnikov Mikhail
• Sorensen Gary P
• Yalamanchili Satish

Classifications

• A61M1/774

  Handpieces specially adapted for providing suction as well as irrigation, either simultaneously or independently · CPC title

• A61F9/00763 Primary

  with rotating or reciprocating cutting elements, e.g. concentric cutting needles (atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016) · CPC title

• A61M1/7411

  by changing the size of a vent (in combination with changing the cross-section of the line A61M1/7413) · CPC title

• A61M2210/0612

  Eyes · CPC title

• A61M1/0047 Primary

  Human Necessities · mapped topic