The temperature changes which occur when soda lime is used to absorb carbon dioxide were measured simulated clinical conditions. The temperature reached in the circle absorption system was found to vary with the room temperature; with a room temperature of 24 degrees C, all brands of soda lime tested reached 40 degrees C in the centre of the circle system. The 'to and fro' absorber achieved a central temperature approximately 5 degrees C higher than in the circle absorber. Temperatures at the periphery were always lower than those measured at the centre of the system. It is still advisable to avoid the use of trichloroethylene in the presence of soda lime and the absence of a safety lock on new anaesthetic machines is regrettable.

Absorption↗

PubMedDate not supplied

Suxamethonium apnoea masked by tetrahydroaminacrine.

A case is reported of a patient who was given THA with suxamethonium and who demonstrated a prolonged apnoea. This patient was later shown to have a variant cholinesterase enzyme. The different techniques of THA and suxamethonium administration are discussed and it is suggested that an initial dose of suxamethonium should precede a THA-suxamethonium combination in order to try and avoid a prolonged apnoea.

Acridines↗

PubMedDate not supplied

General anesthesia in the presence of Eisenmenger's syndrome.

The theoretical implications of anesthetizing patients with Eisenmenger's syndrome are discussed and the anesthetic management of 16 such patients is described. A variety of technics were chosen which caused minimal depression of the cardiovascular system. These patients tolerate general anesthesia well and do not present the risks that have been suggested on theoretical grounds.

Adolescent↗

PubMedDate not supplied

Antepartum fetal heart rate tests and induction of labour.

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Female↗