Skin Turgor Assessment Should NOT Be Used in Older Adults
Skin turgor should NOT be used to assess hydration status in older adults, as it is unreliable and can lead to misdiagnosis of dehydration. 1
Critical Guideline Recommendation
The 2022 ESPEN Practical Guideline on Clinical Nutrition and Hydration in Geriatrics provides a Grade A recommendation with 83% consensus that explicitly states: "Simple signs and tests commonly used to assess low-intake dehydration such as skin turgor, mouth dryness, weight change, urine color or specific gravity, shall NOT be used to assess hydration status in older adults." 1
Traditional Technique (For Reference Only)
While the traditional "pinch test" is the most commonly described method 2, it involves:
- Pinching the skin (typically on the forearm, back of hand, or subclavicular area) between thumb and forefinger
- Releasing and observing how quickly the skin returns to its normal position
- Normal skin should return immediately; delayed return traditionally suggested dehydration
However, this technique is fundamentally flawed in older adults due to age-related loss of skin elasticity, making it diagnostically inaccurate regardless of hydration status 1.
Why Skin Turgor Fails
In Older Adults:
- Age-related changes in skin elasticity render the test unreliable 1
- Even when measured at multiple sites (subclavicular, forearm, thigh), specificity remains poor 3
- Can lead to dangerous misdiagnosis, delaying appropriate treatment for dehydration
Evidence Quality Issues:
A 2022 systematic review found that skin turgor studies lack methodological rigor, with scores ranging only 3-13 out of 14 possible points, and most evidence rated at level 4 (lowest quality) 2.
What to Use Instead
For older adults, use serum/plasma osmolality:
- Direct measurement >300 mOsm/kg indicates dehydration 1
- If unavailable, use calculated osmolarity: 1.86(Na+ + K+) + 1.15(glucose) + urea + 14 (all in mmol/L), with threshold >295 mmol/L 1
Limited Pediatric Application
In children only, skin turgor (measured as capillary refill time at the fingernail bed) may have some utility:
- ≤1.5 seconds: <50 mL/kg deficit
- 1.5-3.0 seconds: 50-100 mL/kg deficit
3 seconds: >100 mL/kg deficit 4
However, even in children, clinical dehydration scales combining multiple findings are superior to any single sign 5.
Common Pitfall
Do not rely on skin turgor in any adult patient when assessing hydration status. This outdated practice can result in missed diagnoses of severe dehydration, which carries significant mortality risk in older adults 3. Always obtain laboratory confirmation with serum osmolality.