Extracorporeal blood handling system with automatic flow control and methods of use

a technology of automatic flow control and extracorporeal blood, which is applied in the field of extracorporeal blood handling system, can solve the problems of significant patient injury, depletion of reservoir and air supply, and the inability to meet the needs of patients, so as to increase the time available for operators

Inactive Publication Date: 2006-01-12
CARDIOVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016] In view of the foregoing, it is an object of the present invention to provide an extracorporeal blood handling system that monitors and automatically modu...

Problems solved by technology

Previously-known methods of CPB are susceptible to several error or trigger conditions.
This may occur in a number of ways, including inadvertent opening of a vent line, improper priming of the circuit, or by turning the heart during surgery.
In addition, differences between blood inflow to a venous reservoir and outflow from the venous reservoir due to the pump head can lead to depletion of the reservoir and the entrainment of large amounts of air.
If returned to the patient, air can cause significant patient injury such as brain damage, cardiac dysfunction, and myocardial damage.
Further, an air-blood mixture may cause turbulence and high shear stresse...

Method used

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  • Extracorporeal blood handling system with automatic flow control and methods of use
  • Extracorporeal blood handling system with automatic flow control and methods of use
  • Extracorporeal blood handling system with automatic flow control and methods of use

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Embodiment Construction

Overview of a Preferred Blood Handling System

[0046] Referring to FIG. 1, a preferred extracorporeal blood handling system 10 suitable for use with the automatic flow control system of the present invention is described. Extracorporeal blood handling system 10 is designed to maintain a patient on full or partial bypass support, for example, during a coronary artery bypass graft procedure, in either a full-bypass or beating heart (partial bypass) mode of operation, or open heart repair procedure, typically with full-bypass mode of operation.

[0047] Extracorporeal blood handling system 10 includes an extracorporeal blood circuit 11 having a perfusion circuit comprising venous line 12, perfusion line segments 13a, 13b and arterial line 14, and a priming / reservoir circuit comprising line 16, priming line 17, and segments 18a and 18b. The ends of perfusion line segments 13a (venous), 13b (arterial) are shown extending into the sterile field as they would appear during use, where they ar...

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PUM

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Abstract

Apparatus for processing blood in an extracorporeal circuit with automatic flow control is provided in which error conditions are sensed and system operation is modulated responsive to the error conditions. The apparatus includes an extracorporeal blood processing system, at least one sensor that senses the presence or absence of gas or monitors venous pressure, and a controller operably coupled to the blood processing system to selectively reduce pump speed or to reconfigure flow paths within the blood processing system responsive to the sensor output.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an extracorporeal blood handling system with automatic flow control and methods for use for monitoring and detecting error conditions, and modulating flow through the extracorporeal blood handling system in response to the detected error conditions. BACKGROUND OF THE INVENTION [0002] For more than thirty years, vascular diseases have been treated using open surgical procedures. In 1999 alone, 753,000 open-heart procedures, including coronary artery bypass grafting (CABG), valve replacements, and heart transplants, were performed. During a typical CABG procedure, a sternotomy is performed to gain access to the pericardial sac, the patient is put on cardiopulmonary bypass (CPB), and the heart is stopped using a cardioplegia solution. [0003] Generally, previously-known CPB is accomplished by constructing an extracorporeal blood handling system including, inter alia, a venous line, a venous reservoir, a centrifugal or roller...

Claims

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Application Information

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IPC IPC(8): A61M37/00A61M1/10A61M1/36A61M27/00
CPCA61M1/101A61M1/3629Y10S128/03A61M2027/004A61M2205/3303A61M2205/3334A61M2205/33A61M1/3603A61M60/113A61M60/554A61M60/38A61M60/232A61M60/538
Inventor LITZIE, A. KENNETHSTRINGER, STEVEN K.FARHANGNIA, MEHRDADTYEBJEE, MUSLIMAFZAL, THOMAS A.BRIAN, BEN F. III
Owner CARDIOVENTION
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