Elderly patients may experience aging of various organ functions, reduced tolerance to drugs, and prolonged drug metabolism time, which may lead to delayed recovery. To avoid delayed awakening, it is advisable to choose short acting anesthetics that are easy to control. The depth of anesthesia should not be too deep, and a reasonable blood pressure should be maintained during the operation to avoid hypotension and hypoxia.
In terms of the nervous system, elderly patients experience brain atrophy, increased intracranial compensatory space, but reduced cerebral blood flow and decreased cerebral vascular autoregulation function. This means that in postoperative anesthesia management, blood pressure fluctuations are more sensitive to the impact on cerebral perfusion, and are prone to situations such as cerebral ischemia or cerebral congestion. For example, when adjusting blood pressure, it is necessary to maintain the appropriate blood pressure level more accurately to ensure stable cerebral perfusion pressure.
In terms of cardiovascular system, elderly patients have decreased heart function, decreased myocardial contractility, reduced vascular elasticity, and are prone to developing cardiovascular diseases such as hypertension and coronary heart disease. Postoperative conditions such as arrhythmia, hypotension, or hypertension may occur, increasing the risk of cardiovascular events. So in anesthesia management, it is necessary to closely monitor cardiovascular indicators to avoid sudden fluctuations in blood pressure and excessive cardiac load.
In terms of respiratory system: reduced thoracic compliance, weakened respiratory muscle strength, decreased lung function, and increased risk of complications such as pulmonary infections and respiratory failure. Postoperative attention should be paid to the recovery of respiratory function, ensuring airway patency, and maintaining effective ventilation and oxygenation.
Metabolism and liver and kidney aspects: Elderly patients have reduced metabolic rate, decreased liver and kidney function, and decreased ability to metabolize and excrete anesthetic drugs. This requires consideration of the drug's metabolic pathway and half-life when selecting anesthetic drugs, in order to avoid adverse reactions caused by drug accumulation, such as delayed awakening.
Prevent vomiting blockage
During the anesthesia recovery period, patients may experience nausea, vomiting, and other symptoms due to drug residue or elevated intracranial pressure. In nursing, it is necessary to help patients tilt their heads to one side, clean up their vomit in a timely manner, promote their recovery of breathing, and avoid situations such as reflux and aspiration.
Timing of extubation: When the patient is able to breathe independently and can open their eyes or respond to coughing stimuli, the tracheal tube should be completely removed after clearing the secretions in the trachea and oropharynx. If the patient has difficulty waking up or the respiratory center is damaged, it is necessary to continue placing an endotracheal tube.
Attention points related to the circulatory system
Blood pressure monitoring, close observation
Due to the increased pain at the surgical incision during anesthesia recovery, patients are prone to elevated blood pressure. Therefore, in nursing care, patients' blood pressure changes should be constantly monitored.
Intracranial blood pressure management
closely monitor blood pressure changes to avoid postoperative bleeding or increased intracranial pressure caused by high blood pressure, as well as cerebral hypoperfusion caused by low blood pressure. For patients with hypertension, appropriate use of antihypertensive drugs can be adjusted based on their preoperative blood pressure control.
When adjusting blood pressure, it should be done slowly and steadily to avoid sudden fluctuations in blood pressure. Due to poor cardiovascular regulation function in elderly patients, excessive blood pressure fluctuations can easily lead to cardiovascular events such as myocardial infarction and stroke.
Monitoring and treatment of arrhythmia: Continuous electrocardiogram monitoring to detect arrhythmia in a timely manner. For common arrhythmias such as premature ventricular contractions and atrial fibrillation, the causes should be analyzed and corresponding treatment measures should be taken. If it is caused by electrolyte imbalance (such as hypokalemia), electrolyte imbalance should be corrected in a timely manner; If it is caused by myocardial ischemia, it is necessary to improve myocardial blood supply, etc.
Pressure management: Pay attention to monitoring and controlling intracranial pressure, and if necessary, use appropriate drugs to reduce intracranial pressure, such as osmotic diuretics (such as 20% mannitol), and monitor the effectiveness of the drugs.
Residual effects of drugs: Choose anesthetic drugs that do not remain in the body or affect the nervous system, ensuring that patients can quickly regain consciousness and reduce the risk of postoperative cognitive impairment.
Precautions related to the nervous system
Observation of consciousness status
Determination and treatment of delayed awakening
If a patient receiving anesthesia does not recover consciousness one hour after surgery, it is considered delayed awakening. Long exposure time, low temperature, low body temperature, drug accumulation, and patient hypoglycemia during cranial surgery are all factors that may lead to delayed recovery after anesthesia. Elevated blood pressure during delayed awakening can have adverse effects on the postoperative anesthesia rehabilitation of patients, endangering their life safety. Therefore, it is necessary to closely monitor and analyze the causes for treatment.
Drug management
Choose anesthesia drugs that do not leave residues or affect the nervous system in the body, ensuring that patients can quickly regain consciousness and reduce the risk of postoperative cognitive impairment.
Postoperative fluid management
Selection of fluid types
Reasonable combination of crystalloid and colloid fluids. Crystal fluids such as physiological saline and balanced salt solutions can supplement the loss of extracellular fluid, but excessive infusion may lead to tissue edema. Colloidal liquids such as albumin and hydroxyethyl starch can maintain plasma colloid osmotic pressure, but attention should also be paid to their adverse reactions, such as allergic reactions and affecting coagulation function.
Liquid volume control
Targeted liquid infusion can maintain stable perioperative hemodynamics, improve brain tissue perfusion, and reduce POD occurrence in patients. It is necessary to comprehensively determine the fluid demand based on the patient's weight, intake and output, and hemodynamic indicators (such as central venous pressure, blood pressure, heart rate, etc.), in order to avoid excessive or insufficient fluid.
Comprehensive management: Considering the possible liver and kidney dysfunction, electrolyte imbalance, and other issues in the elderly, postoperative monitoring of these indicators should be closely monitored to adjust treatment plans in a timely manner.