Although the chances of an air embolism occurring is rare, it is still a significant potential side effect during infusion therapy. An air embolism occurs when an air bubble or group of air bubbles enter a vein or artery and block the normal flow of blood. Air embolisms can travel throughout the body and cause severe cardiovascular and pulmonary issues.
Several of the common causes for air embolism include:
- Infusion lines that are not properly filled and completely vented.
- Errors occurring during the execution of a pressure infusion.
- Accidentally during specific surgical interventions that require the opening of the vascular system (neurosurgical, vascular, obstetric, gynecological, orthopedic, etc.)
- During parallel infusions (gravity infusions and infusion pumps).
- Air entering through open IV access and infusion systems. This can be influenced by the position of the vein and patient with respect to the right side of the heart.
- Non Intravenous/ non health care oriented causes include cases of scuba diving and rare cases involving orogenital sex during pregnancy.
Regardless of how they occur, an Air Embolism is a serious complication that can endanger the well being of a patient and add significant costs to any form of patient care. The best way strategy of handling air embolisms is prevention. Several key preventive strategies are listed below:
- When a peripheral cannula is inserted, the risk of air embolism can be reduced by ensuring that the selected arm of the patient is kept below the level of the heart during the insertion or removal procedure.
- The supine or Trendelenburg position is ideal for the insertion of a central venous catheter.
- The use of Luer-Lock connections can minimize the potential for the accidental disconnection of administration sets and syringes from intravenous catheters.
The above listed items are in no way all inclusive. For a detailed and evidence based discussion of air embolisms in the clinical setting it is advisable for nursing teams to seek out continuing education on the topic. There are several excellent sources of nursing continuing education available online and it is crucial for health care providers to stay up to date on the latest evidence based practices.