Infusing Liquid Anaesthetics into a Closed Circuit
| Autor: | R Ross Kennedy, H. M. Weir |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Time Factors
Functional Residual Capacity Nitrous Oxide Critical Care and Intensive Care Medicine chemistry.chemical_compound Anesthesia Closed-Circuit medicine Humans Cardiac Output Infusion Pumps Closed circuit Electronic circuit Isoflurane business.industry Nebulizers and Vaporizers Body Weight Nitrous oxide Pulmonary Alveoli Constant rate Anesthesiology and Pain Medicine chemistry Anesthesia Anesthetics Inhalation Propofol business medicine.drug |
| Zdroj: | Anaesthesia and Intensive Care. 22:376-379 |
| ISSN: | 1448-0271 0310-057X |
| DOI: | 10.1177/0310057x9402200408 |
| Popis: | Closed circuit anaesthesia offers the user many advantages but practical problems impede its widespread use. When conventional vaporizers are employed adequate amounts of agent cannot be delivered into a totally closed circuit during the early stages of an anaesthetic. Direct injection, or infusion, of liquid anaesthetic into the circuit overcomes this problem. The standard method for injecting agents directly into circuits is that described by Lowe and Ernst1. Their system can be approximated to a series of constant rate infusions, as is frequently done for propofol, and forms the basis of our technique. For anaesthesia without nitrous oxide, liquid isoflurane should initially be infused into the circuit at a rate in ml/hr of 14 + 0.4 × weight in kg. After five minutes the infusion rate is reduced to 20% of this value. These rates are altered in the light of measured concentrations and clinical responses. |
| Databáze: | OpenAIRE |
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