This study compares differences in hemodynamic ve ECG parameters of patients undergoing urological or orthopedic surgery under spinal anesthesia. First group will comprise of patients undergoing surgery in the morning hours; thus with a standard fasting duration (8 hours), and the second group will comprise of patients undergoing surgery afternoon; thus having a prolonged fasting duration (\>12 hours).
Patients who are scheduled for surgery in surgical wards are routinely fasted after 12am on the day of the surgery regardless of the planned hour of the surgery. This results in a near standard fasting for patients with a planned surgery time in morning hours of the day. However, patients with a planned surgery time in the afternoon hours of the day are fasted more than 12 hours. This situation may not look very important for a healthy young adult but considering that the patient population in a hospital is mostly consisted of sick and elderly people, fasting and associated dehydration may have serious deleterious effects. Our objective is to observe and define these potential deleterious effects with a special focus on cardiovascular system of the patients.
Study Type
OBSERVATIONAL
Enrollment
100
Patients will be exposed to preoperative fasting
Patients will be exposed to preoperative fasting
Spinal Anesthesia with heavy bupivacaine 0.5% is provided.
Izmir Bozyaka Training and Research Hospital
Izmir, İzmir, Turkey (Türkiye)
Evidence of ischemic changes in 12 lead electrocardiogram
Changes in ST and T waves compared to a baseline preoperative ECG will be monitored and recorded right after spinal block is placed, and at 1st, 2nd, 5th and 15th minutes after spinal injection
Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Evidence of hypotension confirmed by non-invasive blood pressure measurement
Changes in mean arterial blood pressure will be monitored and a decrease of 10% from baseline mean arterial blood pressure will be recorded as hypotension right after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block spinal block is placed
Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Evidence of hypertension confirmed by non-invasive blood pressure measurement
Changes in mean arterial blood pressure will be monitored and an increase of 10% from baseline mean arterial blood pressure will be recorded as hypertension right after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Evidence of hypoxia confirmed by peripheral oxygen saturation probe
Peripheral oxygen saturation will be continuously monitored and any value less than 90% will be recorded right after spinal block is placed, at first, second, fifth minutes and at 15th minute
Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Evidence of tachycardia in 12 lead electrocardiogram
A heart rate equal to / higher than 100 will be recorded right after spinal block is placed, at first, second, fifth minutes and again at 15th minute
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Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block
Evidence of bradycardia in 12-lead electrocardiogram
A heart rate equal to / less than 50 will be recorded right after spinal block is placed, at first, second, fifth minutes and again at 15th minute
Time frame: Immediately after, 1, 2, 5 and 15 minutes after injection of bupivacaine for spinal block