Which of the following is the MOST reliable clinical sign for assessing 5–10% dehydration in a 6-month-old infant?

• A Dry mucous membranes
• B Absent tears
• C Sunken anterior fontanelle
• D Capillary refill time >2 seconds ✓

Explanation

Capillary refill time (CRT) >2 seconds is considered one of the most reliable clinical indicators of significant (5–10%) dehydration in infants because it reflects decreased peripheral perfusion. While sunken fontanelle and dry mucous membranes are also useful signs, CRT combines high sensitivity with objectivity and is less affected by ambient temperature than other signs in this age group. Loss of skin turgor is another well-validated sign at this degree of dehydration.

Reference: Ghai Essential Pediatrics, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.