In infants ________ is the commonest site of venipuncture.
Aumbilical vein
Bfemoral vein
Canticubital vein
Dnone of these
Answer:
B. femoral vein
Read Explanation:
Venipuncture Sites in Infants
- Scalp Veins: In infants, particularly those under 6 months of age, the scalp veins (specifically the superficial temporal vein) are frequently utilized for venipuncture. This site is often chosen because the veins are superficial and clearly visible due to thin subcutaneous fat and skin.
- Dorsal Hand Veins: The veins on the dorsum (back) of the hand are a primary site for peripheral intravenous (IV) cannulation and blood sampling in infants and children.
- Great Saphenous Vein: The medial aspect of the ankle, where the great saphenous vein is located, is another common site, especially when upper extremity veins are inaccessible.
- Antecubital Fossa: While common in older children and adults, the veins in the antecubital fossa are often smaller and harder to palpate in neonates and young infants, making them less preferred as a first-line option compared to the scalp or hand.
- Clinical Preference: The choice of site is determined by the infant's age, anatomical accessibility, and the specific clinical requirement (e.g., blood volume needed vs. IV therapy duration).
- Equipment Considerations: Pediatric venipuncture often requires specialized small-gauge needles (typically 22-24 gauge) or butterfly needles to minimize trauma to small, fragile vessels.