Hypercapnia

Introduction Hypercapnia is a protective strategy that has been recognized and proven to treat children with respiratory failure, allowing a certain degree of elevation of PaCO2 to avoid lung damage caused by high tidal volume and hyperventilation. There is no hypoxemia during hypercapnia. Although PaCO2 has a lower pH value, there is only a temporary neurological inhibition in the clinic, which is characterized by slow response or coma.

Cause

Hypercapnia has a good effect in the treatment of certain lung diseases in adults, such as adult respiratory distress syndrome (ARDS), chronic airway obstruction and mechanical ventilation in patients with bronchial asthma, significantly reducing air leakage, lung parenchymal injury and off Complications such as machine difficulties occur; in the hyaline membrane disease of premature infants, the incidence of barotrauma and bronchopulmonary dysplasia (BPD) is significantly reduced. There is no hypoxemia during hypercapnia. Although PaCO2 has a lower pH value, there is only a temporary neurological inhibition in the clinic, which is characterized by slow response or coma.

an examination

Related inspection

Arterial blood gas analysis blood routine ineffective cavity volume / tidal volume ratio

Therefore, clinically, patients with hypercapnia should be examined:

First, physical examination

Taking a medical history gives us a first impression and revelation, and also guides us to a concept of the nature of the disease.

Second, laboratory inspection

Laboratory examinations must be summarized and analyzed based on objective data learned from medical history and physical examination, from which several diagnostic possibilities may be proposed, and further consideration should be given to those examinations to confirm the diagnosis.

Differential diagnosis

Hypercapnia needs to be differentiated from the following symptoms:

Hypoxemia: refers to the lack of oxygen in the blood, mainly manifested by decreased blood oxygen partial pressure and blood oxygen saturation. Hypoxemia is one of the common critical illnesses in respiratory diseases and one of the important clinical manifestations of respiratory failure. Because hypoxemia refers to the fact that arterial blood oxygen levels are lower than normal and are the result of external respiratory disorders.

Hypoxia: The abnormal function of organ tissue for the lack of oxygen in cells is the result of internal respiratory disorders.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.