The main objective of this study is whether preloading before positioning would be effective for less hemodynamic instability. The study also analyzes that patients with preloading will decrease postoperative nausea and vomiting, better surgical satisfaction and shortened the duration of surgery and anesthesia.
Keeping patients in normovolemic state and hemodynamically stable in anesthesia and intensive care practice are important goals of anesthesiologist. It is known that hypotension that develops after taking patients to the beach chair position has a negative effect on cerebral oxygenation. Aggressive fluid regimes using to prevent hypotension can cause glycocalyx damage, edema and organ dysfunction. Also hypertension seconday to vasopressor therapy can cause bleeding at the surgical site and impaired surgical visualization during the arthroscopic shoulder surgery. In the literature, there are studies examine whether the hypotension is the result of decreased cardiac output or decreased systemic resistance and what should be the optimal treatment , but as far as investigators know, there is no study about effects of preloading before the beach chair position on hemodynamic parameters.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
49
crystalloid fluid at 10 ml/kg of ideal body weight was administered intravenously in 30 min before the BCP for patients
Istanbul Unıversity, Istanbul Faculty of Medicine
Istanbul, Turkey (Türkiye)
Mean arterial pressure
(mmHg)
Time frame: during surgery (spesicific time intervals (after induction - after BCP position - 0th min - 5th min - 10th min- 30th min- 60th min)
Cardiac output
(L/min)
Time frame: during surgery (spesicific time intervals (after induction - after BCP position - 0th min - 5th min - 10th min- 30th min- 60th min)
Stroke volume variation
(%) data obtained from arterial contour analysis
Time frame: during surgery (spesicific time intervals (after induction - after BCP position - 0th min - 5th min - 10th min- 30th min- 60th min)
Heart rate
bpm
Time frame: during surgery (spesicific time intervals (after induction - after BCP position - 0th min - 5th min - 10th min- 30th min- 60th min)
Postoperative nausea and vomiting
PONV rates
Time frame: in postoperative first day
Surgical satisfaction rate
Surgical satisfaction scale (0-10, 0 lowest score, 10 highest score) (score)
Time frame: in postoperative first day
The duration of anesthesia and surgery
The duration of anesthesia and surgery (min)
Time frame: during surgery
Ephedrine usage
total ephedrine dose (mg) used during surgery
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Time frame: during surgery
Total amount of crystalloid and colloid
Total amount of crystalloid and colloid (ml)
Time frame: during surgery