| Autor: |
Qi, Zhang, Griffin P, Murray, Joseph E, Hill, Stephen L, Harvey, Alvaro, Rojas-Pena, Jonathan, Choi, Yang, Zhou, Robert H, Bartlett, Mark E, Meyerhoff |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Anal Chem |
| ISSN: |
1520-6882 |
| Popis: |
In this report, the innate ability of nitric oxide (NO) to inhibit platelet activation/adhesion/thrombus formation is employed to improve the hemocompatibility and in vivo accuracy of an intravascular potentiometric PCO(2) (partial pressure of carbon dioxide) sensor. The catheter-type sensor is fabricated by impregnating a segment of dual lumen silicone tubing with a proton ionophore, plasticizer and lipophilic cation-exchanger. Subsequent filling of bicarbonate and strong buffer solutions, and placement of Ag/AgCl reference electrode wires within each lumen, respectively, enables measurement of the membrane potential difference across the inner wall of the tube, with this potential changing as a function of the logarithm of sample PCO(2). The dual lumen device is further encapsulated within a S-nitroso-N-acetyl-DL-penicillamine (SNAP)-doped silicone tube that releases physiological levels of NO. The NO releasing sensor exhibits near-Nernstian sensitivity towards PCO(2) (slope = 59.31 ± 0.78 mV/decade) and low drift rates (< 2 mV/24h after initial equilibration). In vivo evaluation of the NO releasing sensors performed in the arteries and veins of anesthetized pigs for 20 h shows enhanced accuracy (vs. non-NO release sensors) when benchmarked to measurements of discrete blood samples made with a commercial blood gas analyzer. The accurate, continuous monitoring of blood PCO(2) levels achieved with this new IV NO releasing PCO(2) sensor configuration could help better manage hospitalized patients in critical care units. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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