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MODULE 3 – DERMAL PUNCTURE, BLOOD CULTURES & SPECIAL CONSIDERATIONS
──────────────────────── In this module, you will learn when venipuncture is not appropriate and how to properly perform dermal (capillary) punctures, including site selection and order of draw for micro-collection tubes. You will also review blood culture collection, strict aseptic technique, proper skin preparation, and why contamination can lead to false-positive results. Special considerations will be covered for: • Pediatric patients
• Geriatric patients
• Patients on anticoagulants
• Patients undergoing chemotherapy
• Legal collections such as blood alcohol and chain of custody procedures This module strengthens your clinical judgment by teaching you how to adjust technique based on patient condition and testing requirements. Many national exam questions focus on these special scenarios, so pay close attention to detail.