What causes oxygen levels to drop after surgery?

General anesthesia and mechanical ventilation impair pulmonary function, even in normal individuals, and result in decreased oxygenation in the postanesthesia period. They also cause a reduction in functional residual capacity of up to 50% of the preanesthesia value.

How long does post operative hypoxia last?

Operational definitions. Early post-operative hypoxemia is defined as the pulse oximetry reading of spO2 less than 90% lasting at least 30 s during transportation from operating theatre and at recovery within 20 min post operatively [5,12,15].

What is the most common cause of low blood oxygen?

Some of the most common causes of hypoxemia include: Heart conditions, including heart defects. Lung conditions such as asthma, emphysema, and bronchitis. Locations of high altitudes, where oxygen in the air is lower.

Is hypoxia common after surgery?

Hypoxia is very common after surgery. Hypoventilation and atelectasis are the most common sources of postoperative hypoxic episodes. Most causes of postoperative hypoxia respond to supplemental oxygen. Continuous pulse oximetry is necessary to detect most episodes of postoperative hypoxia.

Can anesthesia cause hypoxia?

Anesthetic agents, properly used, do not give rise to hypoxia; rather, the impaired oxygenation is caused by such factors as pre-existing disease or trauma, the position of the patient, other mechanical interferences with ventilation, a less than optimal pattern of ventilation, and an inadequate oxygen carrying …

Does anesthesia cause hypoxia?

What are two conditions that could result in lower oxygen saturation?

Some of the most common causes of low blood oxygen levels (hypoxemia) include:

  • Heart conditions.
  • Lung conditions such as asthma, emphysema, and bronchitis.
  • Strong pain medications or other problems that slow breathing.
  • Sleep apnea (impaired breathing during sleep).
  • Inflammation or scarring of your lung tissue.

Is it normal to be out of breath after surgery?

Anesthesia hampers your normal breathing and stifles your urge to cough. After chest or abdominal surgery, it could hurt to breathe in deeply or push air out. Mucus may build up in your lungs. You may not have any symptoms.