Apparatus and method for venting gas from a liquid

A gas and exhaust chamber technology applied in the field of medical liquid delivery system to achieve the effect of reducing supervision, improving sterility and extending life

Active Publication Date: 2014-11-26
FRESENIUS MEDICAL CARE HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Continuous release of gas through a semipermeable membrane may tend to degrade the membrane due to the pressure exerted by the gas across the membrane

Method used

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  • Apparatus and method for venting gas from a liquid
  • Apparatus and method for venting gas from a liquid
  • Apparatus and method for venting gas from a liquid

Examples

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Embodiment Construction

[0027] extracorporeal circuit

[0028] figure 1 A typical extracorporeal hemodialysis circuit 100 is illustrated, including conduits through which blood flows and components for filtering the blood and performing hemodialysis. Blood flows from the patient 105 through the arterial catheter 110 . After leaving the patient, the blood drips into the drip chamber 115 , where the connection tube 116 from the drip chamber 115 is attached to an arterial pressure sensor assembly 120 which determines the pressure of the blood on the arterial side of the circuit 100 . The arterial pressure assembly 120 may include a pressure sensor 130 so that the pressure of blood flowing through the circuit 100 on the arterial side may be monitored.

[0029]A pump 160 , such as a peristaltic pump, pushes the blood to continue along the path through the circuit 100 . After leaving drip chamber 115, the blood then flows through conduit 117 to dialyzer 170, which separates waste products and excess fl...

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Abstract

The present invention relates to an apparatus and method for venting a gas from a liquid, which are applicable to a wide variety of medical liquid delivery systems. The apparatus includes level detectors, a clamp, and a control apparatus operably connected to the level detectors and the clamp. The method includes detecting whether liquid or gas is present at the level detectors, and opening and closing a clamp to vent gas. The present invention also relates to an apparatus and method for controlling pressure differential across a semipermeable membrane by using a pressure sensor, a gas source, a valve, and a membrane.

Description

[0001] Related applications [0002] This application claims the benefit of US Provisional Application No. 61 / 609,587, filed March 12, 2012. The entire teachings of US Provisional Application No. 61 / 609,587, filed March 12, 2012, and US Provisional Application No. 61 / 470,680, filed April 1, 2011, are hereby incorporated by reference. Background technique [0003] Hemodialysis is the diffusional transfer of small solutes out of plasma by diffusion across permselective membranes. Hemodialysis is driven by a concentration gradient across a selectively permeable membrane, causing the diffusion of solutes from a fluid with a higher concentration to a fluid with a lower concentration. Hemodialysis removes toxic substances, metabolic waste and excess fluid from the bloodstream using an extracorporeal circuit with components designed to perform ultrafiltration and diffusion of the blood. Air bubbles are removed from the blood to inhibit emboli before the blood is returned to the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/16
CPCA61M1/3639A61M1/3624A61M2205/3386A61M2205/3382A61M2205/123A61M1/16A61M1/3627A61M1/362265A61M1/36224A61M1/36226A61M1/362262F04C2270/041A61M2205/3331A61M1/3641Y10T137/3087
Inventor M·J·科恩科维施C·韦弗
Owner FRESENIUS MEDICAL CARE HLDG INC
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