An anesthesia approach used for endoscopy, colonoscopy, and minor surgical procedures. Calming and analgesic medications are administered at light to deep levels to keep the patient comfortable.
Indication
- Diagnostic procedures such as endoscopy, colonoscopy, and bronchoscopy
- Dental treatments and minor surgical procedures
- Imaging studies (MRI, CT) in children when stillness is required
- Painful procedures in patients with high anxiety
- Cardiac catheterization and interventional radiology procedures
- Recurrent painful interventions such as wound care and dressing changes
Preparation
- Anesthesia evaluation and the relevant laboratory tests
- No solid food for 6 hours and no clear liquids for 2 hours before the procedure
- Plan regularly used medications with the physician's approval
- Arrange a companion to accompany the patient home (no driving for 24 hours)
- Inform the team of any known drug allergies and previous sedation experiences
How it's performed
- An intravenous line is established; heart rhythm, blood pressure, oxygen level, and respiration are continuously monitored
- The anesthesiologist administers the appropriate medications (midazolam, propofol, fentanyl, etc.) intravenously
- Sedation depth is adjusted to minimal, moderate, or deep levels depending on the type of procedure
- The patient maintains spontaneous breathing; supplemental oxygen is provided when needed
- The anesthesiologist remains present throughout the procedure and adjusts medication dosing
- At the end of the procedure, medications are stopped and the patient gradually wakes up
Post-procedure
- Observation in the recovery room for 30-60 minutes
- Discharge is provided once full alertness and orientation are achieved
- Driving, operating machinery, and important decision-making are prohibited for the first 24 hours
- Mild drowsiness and temporary forgetfulness may occur; plenty of fluids and rest are recommended
- Mild side effects such as nausea and dizziness usually resolve within a few hours
Risks
- Temporary respiratory depression (especially with deep sedation) — monitored and managed by the anesthesia team
- Temporary changes in blood pressure and heart rhythm
- Nausea, dizziness, and mild confusion (usually resolve within hours)
- Drug allergy and rare paradoxical reactions (restlessness, agitation)
- Aspiration risk (when fasting rules are not followed)
FAQ
What is the difference between sedation and general anesthesia?
Under sedation, the patient breathes spontaneously and may respond to verbal commands depending on the depth. Under general anesthesia, consciousness is fully suppressed and the airway is supported with a device.
Will I remember the procedure?
It depends on the depth of sedation. Most patients partially or fully forget the procedure (anterograde amnesia). This is a known and intended feature of the technique.
Is sedation safe?
Sedation performed by an anesthesiologist with proper equipment and monitoring is considered safe. The airway and respiration are continuously monitored.
When can I return to normal activity after sedation?
Most patients return to normal activities after 24 hours. Driving and important decision-making are not advised during the first 24 hours.
Related Information
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General Anesthesia
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General anesthesia — an anesthetic method in which consciousness and pain sensation are completely eliminated for surgical procedures.
Spinal anesthesia
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Spinal anesthesia — a regional anesthesia technique applied through the lower back to numb the lower half of the body.
Epidural Anesthesia
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Epidural anesthesia — placement of a catheter into the epidural space in the lower back to provide long-lasting pain control.
Local Anesthesia
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Local anesthesia — a superficial anesthesia method in which only a small area of skin where the procedure will be performed is numbed.
Regional anesthesia
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Regional anesthesia — numbing of a specific body region using a nerve block.
Patient-Controlled Analgesia
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Patient-controlled analgesia (PCA) — a safe system in which the patient determines their own pain medication dose.
Epidural Anesthesia for Vaginal Delivery
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Epidural anesthesia — pain management administered at the L3-L4 level for vaginal delivery.
Preoperative anesthesia evaluation
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Preoperative anesthesia evaluation — anesthesia risk analysis and planning before surgery.