IV Therapy | Part One

Important tool for cardiac disease, hypoglycemia, seizures and shock also:

  • Routes for meds
  • Precautionary measure

IVs come in four types

  • Crystalloids – dissolving crystals (salts and sugars) in water. Ions cross the cell membrane quickly so for every L of blood lost, give 3L *(3:1 ratio)*
  • Colloids – Expensive, need refrigerated, not given in field. Large molecules like proteins which do not readily pass through the cell membrane, they stay in the intravascular space longer and the pressure pulls fluid from other spaces. So they are called Volume Expanders.
  • Blood – expensive, needs typed, needs refrigerated, needs a special filter, given in hospital
  • O2 Carrying fluids

Administrative Set: 70-110” long, 5 Components

  1. Piercing spike – sharp, pointy with protective cap
  2. Drip chamber – Micro (60 drops per mL) Macro (10, 15 or 20 drops per mL)
  3. Flow Clamp – roller clamp controls amount of fluid
  4. Drug Admin port – y-shaped inlet, clean with alcohol before using
  5. Connector End – connects to the hub of the catheter, also has protective cap

Blood Tubing: larger internal diameter and a special blood filter, usually drip factor of 10 drops/mL. Two types:

  1. Y tubing – more flexibility for administering fluids (swapping etc.)
  2. Straight tubing

Volume Control: Burette Set. Chamber with measuring lines, when specified amounts need to be administered usually 100-150 mL.


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