A comparison of simple identification tests to distinguish cerebrospinal fluid from local anaesthetic solution
| Autor: | D. R. Quance, R. M. Wahba, S. Wiesel, Michael J. Tessler |
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| Rok vydání: | 1994 |
| Předmět: |
Bupivacaine
Anesthesia Epidural Local anaesthetic Small volume Local anesthetic medicine.drug_class business.industry Temperature Hydrogen-Ion Concentration Epidural space Single test Catheter Anesthesiology and Pain Medicine Cerebrospinal fluid medicine.anatomical_structure Glucose Nephelometry and Turbidimetry Anesthesia medicine Humans Anesthetics Local business medicine.drug Cerebrospinal Fluid |
| Zdroj: | Anaesthesia. 49(9) |
| ISSN: | 0003-2409 |
| Popis: | Local anaesthetic solution is sometimes used to enlarge the epidural space in preparation for the insertion of an indwelling epidural catheter and during subsequent checking a small volume of fluid may be aspirated. Twelve anaesthetists were asked to distinguish 0.1 ml plain bupivacaine 0.25% from 0.1 ml simulated cerebrospinal fluid (CSF) solution. The distinction was based on differences in the physicochemical properties of the two test solutions, namely, temperature, presence of glucose, pH, and turbidity when mixed with thiopentone. Temperature difference resulted in correct identification of the two solutions in 75% of cases, the presence of glucose in 92%, pH in 83%, and turbidity in 25% of cases. No single test resulted in correct identification by all the anaesthetists. We suggest that more than one physicochemical test is required to identify correctly the nature of the small volume of liquid which may be aspirated from an epidural catheter. |
| Databáze: | OpenAIRE |
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