Rotational atherectomy system

• US 20060258976A1
• Filed: 05/11/2006
• Published: 11/16/2006
• Est. Priority Date: 10/19/2001
• Status: Active Grant

• Current Assignee: Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Shturman Cardiology Systems, Inc.
• Inventors: Shturman, Leonid, Morov, Georgy Vasilevich, Malgichev, Vladimir Alekseevich
• Granted Patent: US 9,078,692 B2
• Time in Patent Office: Days
• US Class Current: 604/22
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2017/00123 and automatic shutdown
• CPC Class Codes: A61B 2017/00137 Details of operation mode
• CPC Class Codes: A61B 2017/00553 using a turbine
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61M 3/0202 with electronic control means or interfaces
• CPC Class Codes: A61M 3/0208 before use
• CPC Class Codes: A61M 3/022 Volume; Flow rate
• CPC Class Codes: A61M 3/0258 by means of electric pumps
• CPC Class Codes: Y10T 137/7793 With opening bias [e.g., pressure regulator]

Abstract

A method system and controller for controlling fluid flow in a rotational atherectomy device. A source of fluid is provided through a pump to the rotational atherectomy device, wherein the pump maintains the fluid flow at a minimal rate during a time period when a drive shaft of the device is not rotating. A first control is activated to increase a rate of the fluid flow and second control is activate to initiate a rotation of the drive shaft during another time period when the fluid flow is at the increased rate.

Claims

1-87. -87. (canceled)

88. A rotational atherectomy system comprising:

a rotational atherectomy device;

a fluid source adapted to supply fluid to the device;

a fluid pump system adapted to pump fluid from the fluid source to the device; and

a switching mechanism having at least a first mode and a second mode, the first mode adapted to change a state of the fluid pump from a static state to a dynamic state, and the second mode adapted to activate a rotation of a drive shaft in the device.

89. The system of claim 88, wherein the switching mechanism comprises a first switch and a second switch, wherein an activation of the first switch corresponds to the first mode and an activation of the second switch corresponds to the second mode.

90. The system of claim 88, wherein the change of the state of the fluid pump from the static state to the dynamic state increases a flow of fluid from the fluid source to the device.

91. The system of claim 88, wherein the static state of the pump corresponds to at lest one state of the rotational atherectomy device when the drive shaft is not rotating.

92. The system of claim 88, wherein the dynamic state of the pump in the first mode corresponds to a state of the rotational atherectomy device for a time period prior to the rotation of the drive shaft.

93. The system of claim 88, wherein the state of the pump remains in the dynamic state for a predetermined period of time after the first mode is activated, and wherein the switching mechanism cannot enter the second mode after the end of the predetermined time period.

94. The system of claim 88, wherein the state of the pump changes from the dynamic state to the static state at the expiration of a predetermined time after the first mode is activated if the second mode is not activated within the predetermined time period.

95. The system of claim 88, wherein the second mode is entered only if the switching mechanism is activated during a predetermined time period following entry of the first mode.

96. The system of claim 88, wherein the second mode maintains the state of the pump in the dynamic state.

97. The system of claim 88, wherein at the end of the second mode, the state of the pump remains in the dynamic state for a second predetermined time period and returns to the static state at the end of the second predetermined time period.

98. The system of claim 88, wherein at the end of the second mode, the state of the pump remains in the dynamic state for a second predetermined time period before returning to the static state unless the first mode or the second mode is reactivated.

99. The system of claim 88, wherein the activation of the second mode only occurs after the activation of the first mode.

100. The system of claim 88, wherein the state of the pump changes from the dynamic state to the static state at the expiration of a predetermined time after the first mode is deactivated if the second mode is not activated within the predetermined time period.

101. The system of claim 88, wherein the dynamic state of the pump in the second mode corresponds to a state of the rotational atherectomy device just prior to the rotation of the drive shaft and during the rotation of the drive shaft.

102. A rotational atherectomy system comprising:

a rotational atherectomy device;

a fluid source adapted to supply fluid to the device;

a pump system adapted to pump fluid from the fluid source to the device;

a first switch adapted to increase a flow of fluid from the fluid source to the device form a first flow rate to a second flow rate when the switch is activated; and

a second switch adapted to activate a rotation of a drive shaft in the device when the second switch is activated.

103. The claim of 102, wherein a pumping of fluid to the device is substantially independent of a rotational speed of the drive shaft.