Electrochemical sensor employing a gas-permeable hydrophilic polyurethane membrane
First Claim
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1. 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.
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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.
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10 Claims
- 1. 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.
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8. 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.
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10. 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.
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