Episode 140.0 Disutility of Orthostatics in volume Loss

Episode 140.0 Disutility of Orthostatics in volume Loss

Author: Core EM April 9, 2018 Duration: 7:23

This week we discuss the disutility of orthostatic vital signs as a diagnostic tool in patients with suspected volume loss.

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Show Notes

Summary: Based on the limited available evidence, it’s unlikely orthostatic vital sign measurement can be used to determine which patients have volume loss and which do not. The baseline prevalence of orthostatic vital signs is common and patients will not always develop orthostatic vital signs in response to volume loss. Therefore, there will both be patients who are orthostatic by numbers without volume loss and there will be patients with volume loss who are not orthostatic by numbers. Symptoms, with the exception of inability to stand to have orthostatics performed, are not useful either.

Bottom Line: Based on the low overall sensitivity of orthostatic vital sign measurements, they should not be used to influence clinical decision making.

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REBEL EM: Orthostatic Hypotension in Volume Depletion

References:

Skinner JE et al. Orthostatic heart rate and blood pressure in adolescents: reference ranges. J Child Neuro 2010; 25(10): 1210-5. PMID: 20197269

Stewart JM. Transient orthostatic hypotension is common in adolescents. J Pediatr 2002; 140: 418-24. PMID: 12006955

Ooi WL et al. Patterns of orthostatic blood pressure change and the clinical correlates in a frail, elderly population. JAMA 1997; 277: 1299-1304. PMID: 9109468

Aronow WS et al. Prevalence of postural hypotension in elderly patients in a long-term health care facility. Am J Cardiology 1988; 62(4): 336-7. PMID: 3135742
Witting MD et al. Defining the positive tilt test: a study of healthy adults with moderate acute blood loss. Ann Emerg Med 1994; 23(6): 1320-3. PMID: 8198307

McGee S et al. The rational clinical examination. Is this patient hypovolemic. JAMA 1999; 281(11): 1022-9. PMID: 10086438

Johnson DR et al. Dehydration and orthostatic vital signs in women with hyper emesis gravidarum. Acad Emerg Med 1995; 2(8): 692-7. PMID: 7584747


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