| Policy no. | Managing Patients with Angina | Policy name | ||
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Policy:
Mechanical Ventilation: It is a method of breathing or assisting the breathing process using a mechanical device. It is used when a patient is unable to breathe sufficiently for adequate gas exchange to meet the body's and tissues' needs, or when the patient is completely unable to breathe. This can occur due to several reasons, such as respiratory failure or other conditions that require respiratory support to maintain oxygen levels in the blood and remove carbon dioxide.
Indications for placing a patient on a mechanical ventilator:
The Indication | The Abnormal Rate | Normal rate |
Respiratory Rate
| Greater than 35 breaths per minute | 10-20 breaths per minute
|
Tidal volume in one breath | Less than 5 mL/kg of body weight | 5-7 mL/kg of body weight |
Maximum inspiratory force
| Less than 25 cm of water
| 75–100 cm of water
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Oxygen level in blood gas analysis
| Less than 60 mmHg when the patient is on 60% oxygen.
| 75–100 mmHg on air
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Carbon dioxide level
| Greater than 60 mmHg
| 35–40 mmHg
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With the presence of some indicators (cyanosis, excessive sweating, confusion, shallow and rapid breathing), it should be evaluated by a doctor.
Different methods of using a ventilator:
1- Continuous Mandatory Ventilation (CMV):
Through this method, the ventilator delivers a set number of breaths and a specific volume of air as determined by the doctor. In this case, the patient does not take any breaths on their own and relies entirely on the ventilator.
Uses of this method:
➡️ It is used for patients with head injuries, as involuntary breathing may lead to increased intracranial pressure.
➡️ During surgical procedures, to administer anesthetic drugs that relax the muscles.
➡️ In cases where anesthetic drugs or muscle relaxants are used, especially when the patient is placed on a ventilator.
2- Synchronized Intermittent Mandatory Ventilation (SIMV):
This method provides the patient with a set number of breaths and a specified volume of air, but the ventilator also allows the patient the opportunity to take breaths on their own.
Uses of this method:
3- Continuous Positive Airway Pressure (CPAP):
This method involves supplying the patient with air at a specific pressure during the breathing process, allowing some air to remain in the alveoli of the lungs. This helps with gas exchange and improves lung efficiency.
Uses of this method:
steps:
The nursing team must observe the following:
In the case of weaning the patient off the ventilator: