Electrochemical sensor employing a gas-permeable hydrophilic polyurethane membrane
AssigneeSmith and Nephew Associated Companies Limited
InventorWilliam D. Potter
Life of this patent
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Abstract
A device for use in determining blood gas which employs a membrane of material permeable to blood gas to be determined characterized in that the membrane is hydrophilic polyurethane is described.
Claims10
In an electrochemical sensor for use in determining blood gas which employs a membrane of material permeable to the blood gas to be determined, the improvement which comprises employing as the membrane a membrane which consists essentially of a hydrophilic linear polyether polyurethane.
In a catheter having an oxygen electrode including a membrane which electrode is operatively mounted at the distal end of the catheter for intravenous use and which electrode employs a membrane permeable to oxygen, the improvement which comprises employing a membrane which consists essentially of a hydrophilic linear polyether polyurethane which when hydrated contains 10 to 40% water as the membrane.
In an oxygen electrode for monitoring oxygen levels which includes a protective membrane which is permeable to oxygen, the improvement which comprises employing as the protective membrane, a membrane which consists essentially of a hydrophilic linear polyether polyurethane.
Dependencies are inferred from the claim text.