PubMed Health⌕ Search

Biomedical subjects

J L Keyes

Publications and source records attributed to J L Keyes.

10 recordsLinked to original sources
PubMed1996

Matching and mismatching ventilation and perfusion in the lung.

Arterial blood-gas composition is determined by ventilation, pulmonary blood flow, and by how ventilation is matched to blood flow in the lungs. In healthy adults there are regional differences in both ventilation and blood flow in the lungs and the distribution of blood flow tends to parallel that of ventilation. Ventilation and blood flow can become mismatched in a variety of disease processes that affect the lungs. Mismatching of ventilation and perfusion causes decreased PaO2, may change PaCO2, and increases AaDO2 difference. Many different types of interventions are frequently necessary to treat mismatching of ventilation and perfusion.

Adult↗
PubMed1996

The pathophysiology of potassium balance.

Knowledge of the mechanisms causing potassium imbalance provides tools for the nurse to assess symptoms and intervene with appropriate and timely action for patients with potassium imbalance. Figure 5 provides a flow chart as a guide for carrying out assessment of potassium balance in those individuals who are at risk.

Humans↗
PubMedDate not supplied

Blood-gas analysis and the assessment of acid-base status.

In this article the more common kinds of acid-base disorders have been discussed. To accurately assess the kind of acid-base disturbance found in a patient, the clinician must know the arterial pH, PaCO2, and the [HCO-3] in arterial blood. Acid-base disturbances are associated with fluid and electrolyte disturbances. Potassium balance is often upset in acid-base disturbances. Accurate determination of K+ balance requires serial or repeated determinations of plasma K+ concentration as well as careful clinical monitoring.

Acid-Base Imbalance↗