🌟OXIGENOTERAPIA EN ENFERMERÍA (Generalidades)🌟
Oxygen Therapy in Nursing: An Introduction
The Role of Oxygen in Life
- Oxygen is crucial for the development and survival of living beings, playing a fundamental role in energy metabolism.
- Aerobic respiration requires a constant supply of oxygen, which is essential for cellular processes and overall metabolic function.
Mechanisms of Oxygen Distribution
- Hemodynamic processes depend on the balance between oxygen supply (transported by hemoglobin) and consumption, influenced by arterial blood pressure.
- Lack of oxygen leads to cell destruction; organs like the brain, heart, kidneys, and liver are particularly vulnerable to hypoxia.
Understanding Oxygen Therapy
- Oxygen therapy involves administering higher concentrations of oxygen than ambient levels (21%) to treat or prevent hypoxia-related symptoms.
- It is used primarily for respiratory conditions (e.g., asthma, emphysema), but also as an adjunct treatment in various medical scenarios such as shock or heart failure.
Objectives and Considerations in Oxygen Therapy
- Key objectives include improving patient oxygenation, preventing hypoxemia, reducing respiratory effort, and ensuring adequate tissue oxygen delivery.
- Maintaining an arterial oxygen pressure above 60 mmHg corresponds to a hemoglobin saturation level of at least 90%.
Equipment Used in Administering Oxygen Therapy
- Various devices are utilized based on individual patient needs; nursing professionals must be well-prepared to manage these tools effectively.
- Essential concepts include understanding flow rate (measured in liters per minute), inspired fraction of oxygen (FiO2), and monitoring oxygen saturation levels.
Monitoring Patient's Oxygen Saturation
- Normal oxygen saturation ranges from 95% to 99%; values below this indicate varying degrees of hypoxia:
- Mild Hypoxia: 91% - 94%
- Moderate Hypoxia: 86% - 90%
- Severe Hypoxia: <86%
Starting Oxygen Therapy: Necessary Equipment
- Required equipment includes an appropriate source of oxygen (cylinders or concentrators), manometers for pressure measurement, and flow meters for controlling output.
- A humidifier is also necessary to prevent drying out the patient's airways during administration.
Understanding Oxygen Delivery Systems
Overview of Oxygen Delivery Mechanisms
- The process begins with regulating pressure through a reducer, allowing oxygen to pass through a flow meter where the liters per minute are controlled for patient administration.
- After regulation, the gas is passed through a humidifier, preparing it for delivery to the patient via various devices.
Types of Oxygen Supply Systems
Low Flow Systems
- Low flow systems do not meet the total inspiratory requirements of patients; the fraction of inspired oxygen (FiO2) varies based on individual ventilatory patterns and oxygen flow rates.
- Common low flow devices include:
- Nasal cannula
- Simple mask
- Reservoir mask (which can be further divided into partial rebreather masks and non-rebreather masks)
High Flow Systems
- High flow systems provide complete inspiratory needs for patients, maintaining a constant FiO2 that is independent of their ventilatory patterns.