The lateral decubitus position is commonly used during surgeries requiring access to the thorax, retroperitoneum, or hip. In this position, the patient lies on their nonoperative side, allowing optimal access to the surgical site while ensuring careful positioning of the extremities to prevent complications.
Indications for Lateral Decubitus Position:
- The lateral decubitus position is ideal for surgeries involving the thorax, retroperitoneum, or hip. It provides surgeons with excellent access to these areas while maintaining patient stability.
Respiratory Considerations:
- Respiratory changes in the lateral decubitus position can occur due to the lateral weight of the mediastinum and cephalad displacement of abdominal contents, resulting in decreased pulmonary compliance. This position favors ventilation of the nondependent lung, which must be monitored closely to ensure adequate gas exchange. Adjustments in ventilation settings and careful monitoring of respiratory parameters are essential to mitigate these effects.
Lower Extremity Positioning and Padding:
- The lower extremities must be carefully padded between the knees and below the dependent knee to avoid excessive external pressure over bony prominences. The dependent lower extremity should be slightly flexed to prevent stretching or compression of the lower extremity nerves. This padding helps distribute pressure evenly, reducing the risk of nerve damage and pressure sores. The hips and knees should not be excessively flexed, as it could obstruct venous return
- Hip straps are essential for maintaining the patient's body stability during the procedure. These straps should be positioned between the iliac crest and the head of the femur to prevent femur dislocation or damage to the floating ribs.
Upper Extremity Positioning and Protection:
- The upper extremities should be positioned in front of the patient with neither arm abducted more than 90 degrees to prevent brachial plexus injury. An axillary roll should be placed below the axilla to prevent compression of the brachial plexus and axillary vascular structures. The dependent upper extremity should be flexed at the shoulder and slightly flexed at the elbow, secured on a padded arm board with additional padding under bony prominences. Invasive arterial monitoring should be placed in the dependent arm to better detect compression of the axillary vascular structures.
- The non-dependent upper extremity should also be flexed at the shoulder and slightly flexed at the elbow, often secured with a suspended armrest. Care must be taken to avoid abducting the arm more than 90 degrees and to pad the bony prominences adequately.
- Commonly the body is held in place with a vacuum-sealed bean bag or a frame .
Head and Neck Positioning:
- The head and neck should be maintained in a neutral position to prevent lateral rotation and stretch injury to the brachial plexus. Special attention should be given to avoid folding or rolling the dependent ear and to ensure there is no undue external pressure on the dependent eye. Proper head and neck positioning helps prevent nerve injuries and maintains airway patency.
