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Recovery room risk and outcome associated with renal extracorporeal shock wave lithotripsy
1Department of Anesthesiology, University of Kansas Medical Center, Kansas City 66160-7415.
Study Objectives:
To determine (1) the general risk and outcome in the recovery room among 4 different anesthetic techniques associated with 2 different extracorporeal shock wave lithotripsy (ESWL) machines and (2) any gender-related differences among patients undergoing ESWL.
Design:
Retrospective statistical analysis.
Setting:
University medical center.
Patients:
2,203 ASA physical status I-IV patients undergoing ESWL over a 46-month period.
Interventions:
A review of the chart records of patients who received 1 of 4 anesthetic techniques (general, spinal, epidural, or monitored anesthesia care) on 1 of 2 ESWL machines.
Measurements And Main Results:
A positive finding was defined as a complication and/or side effect of such significance as to require a treatment order or recovery room note on the patient's chart. The main complications and/or side effects were nausea and/or vomiting, flank pain, and hypertension. Female patients experienced flank pain and nausea and/or vomiting with general anesthesia and monitored anesthesia care at approximately twice the frequency of males.
Conclusions:
(1) Overall, ESWL is relatively safe. Both machine types and all anesthetic techniques exhibited a low risk and good outcome. (2) There appear to be gender-related differences during ESWL. Female and male patients may have different pain and nausea and/or vomiting thresholds during ESWL.