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April 1997
Volume 61 |
Number 4
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TO THE MEMBERSHIP
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| Hyperthermia,
Yesteryear |
A review of the materials in the current issue regarding malignant
hyperthermia caused this editor to reflect on the past and retrieve
the following case study and comments from the archives of the
NEWSLETTER.
"A 15-month-old child underwent closure of a cleft palate
under endotracheal cyclopropane, nitrous oxide, oxygen-ether anesthesia.
Five hours later, hyperthermia developed, followed by death two
hours and 10 minutes later."
Comments were sent in by readers. Some of their commentaries
included the following "observations":
- "There is certainly nothing in the protocol to suggest
any major lapse in anesthetic management. One might be a 'nit-picker'
over the use of the Y-tube, instead of an absorption method
with assisted respiration. The long and successful use of the
Y or T-tube method is above serious reproach."
- "The causes of this accident can be defined, but why
it happened cannot be as specifically delineated, although a
reasonable general hypothesis may be made. That it happened
at all is an indictment of the anesthetic management, although
the anesthesiologist concerned could not, in all sincerity,
diagnose his error."
- "A child of this age has a poorly developed, easily upset
temperature regulating center. We know that her hypothalamus
was injured either directly by hypoxia or secondary to a change
in intracranial pressure. At this age, the hypothalamus is very
sensitive to such alterations in intracranial pressure."
- "The cerebral edema is most likely due to hypoxia (although
it could be the result of hypercarbia). Somewhere in the seemingly
well-conducted anesthesia this occurred. We can only speculate
which of the numerous 'whys' was at fault."
Temperature management plagued earlier anesthesiologists in an
era absent of continuous temperature-recording capabilities. Furthermore,
intubations were usually carried out with straight ether or cyclopropane
anesthesia in children. Succinylcholine was not commonly used
for children in the Editor's experience.
There will be two more articles in upcoming issues of the NEWSLETTER
on the clinical presentation of malignant hyperthermia by
Richard Kaplan, M.D., and on the epidemology of malignant hyperthermia,
co-authored by Steven M. Karan, M.D. and Carolyn P. Greenberg,
M.D.

Erwin Lear, M.D.
Editor
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