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Respiratory compensation adjusts breathing to address abnormal blood pH, commonly seen in hospitalized patients with metabolic acidosis or alkalosis. Slow breathing can cause acidosis, while hyperventilation can cause alkalosis. Healthcare professionals should monitor pH levels and adjust ventilation accordingly. Acid-base disturbances can be checked with rapid tests, and caution should be exercised during anesthesia and mechanical ventilation.
Respiratory compensation is an adjustment of the respiratory rate to address abnormal blood pH. This provides an immediate way for the body to deal with dangerously alkaline or acidic blood levels while waiting for the kidneys and other organs to kick in and further stabilize blood pH. This is most commonly seen in hospitalized patients who have serious health problems leading to metabolic acidosis or alkalosis. For patients on ventilators, healthcare professionals need to pay attention to blood pH levels so that ventilation can be adjusted to keep the patient within a safe range.
Patients who breathe slowly have difficulty eliminating carbon dioxide, leading to a drop in blood pH. Coma, blood overdose, and some forms of shock can cause a decrease in respiratory rate and contribute to metabolic acidosis. Other patients may hyperventilate, making the blood more alkaline by rapidly expressing carbon dioxide. The change in blood pH will trigger the body to attempt to regulate the breathing rate to compensate, and the kidneys will also start working to stabilize the pH levels.
In cases of high pH, respiratory compensation involves slower breathing to increase the acidity of the blood by retaining carbon dioxide. Patients in a state of metabolic acidosis breathe faster to express carbon dioxide. Both forms of respiratory compensation can be observed by healthcare professionals who may notice changes in a patient’s respiratory rate that coincide with blood pH levels. Patients who cannot breathe on their own may need adjustments to their ventilator settings to provide respiratory compensation.
Acid-base disturbances in the blood can become a serious medical problem and occur in conjunction with a number of health problems. Healthcare professionals can use rapid fingerstick tests to check the acid-base level in the blood and determine if a patient needs interventions. They may also assume that the blood pH is abnormal based on the patient’s condition, behavior, and symptoms. A patient being treated for an opioid overdose who breathes slowly, for example, likely has acidic blood and needs treatment to address it.
Caregivers must exercise caution during anesthesia and mechanical ventilation, as the patient’s blood pH can be disturbed if the equipment is not set up correctly. Patients who cannot breathe on their own may already have health problems, putting them at risk for dangerous pH levels, and clinicians must determine what level of respiratory compensation would be appropriate for the patient’s needs. General ventilation guidelines provide specific guidance on how to adjust equipment to address problems related to acidic or alkaline blood.
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