Anesthesia and analgesia
-
Anesthesia and analgesia · Oct 2024
Optimal Infusion Rate of Norepinephrine for Prevention of Spinal Hypotension for Cesarean Delivery: A Randomized Controlled Trial, Using Up-Down Sequential Allocation.
Norepinephrine has recently been suggested to be as effective as phenylephrine for the prevention of hypotension after spinal anesthesia for cesarean delivery. Moreover, compared to phenylephrine, norepinephrine may be superior in maintaining heart rate (HR) and consequently, cardiac output (CO). A recent study demonstrated that norepinephrine given as a single intravenous bolus is approximately 13 times more potent than phenylephrine. However, it is uncertain whether this finding can be applied when these vasopressors are administered as infusions. Therefore, the optimum infusion rate of norepinephrine remains unknown. We aimed to determine the median effective dose (ED50; defined as the rate of vasopressor infusion required to prevent spinal hypotension in 50% of subjects) of both drugs needed to maintain maternal systolic blood pressure within 20% of the baseline after spinal anesthesia for cesarean delivery and to derive the relative potency ratio. ⋯ Norepinephrine is more potent than phenylephrine by a factor of approximately 13 when administered as infusion for equivalent maternal blood pressure control. Based on these findings, we recommend a variable rate prophylactic infusion of norepinephrine to be initiated at 1.9 to 3.8 µg.min-1 for the management of hypotension during cesarean delivery under spinal anesthesia.
-
Anesthesia and analgesia · Oct 2024
Preoperative Smoking-Cessation Interventions to Prevent Postoperative Complications: A Quality Assessment and Overview of Systematic Review Evidence.
Multiple systematic reviews have investigated the effectiveness of preoperative interventions for smoking-cessation, although relatively few have focused on the prevention of surgical complications. This overview of systematic reviews aimed to describe the types of smoking interventions studied to prevent postoperative complications, summarize the results, and evaluate the quality of the reviews and strength of evidence to inform clinicians, health practitioners, policy developers, and government bodies. Comprehensive searches of Cochrane Library, MEDLINE, EMBASE, CINAHL, and Johanna Briggs Institute databases were conducted to identify systematic reviews of preoperative smoking-cessation interventions to prevent surgical complications (inception-May 14, 2024). ⋯ This overview provides the most up-to-date summary and quality assessment of systematic review evidence on the effectiveness of preoperative smoking-cessation interventions to prevent surgical complications. The evidence supports providing smoking-cessation interventions which include multiple behavioral support sessions and pharmacotherapy implemented at least 4 weeks before surgery to reduce postoperative complications. Consequently, anesthesiologists need to work with primary care physicians, consultants, and surgeons to optimize smoking-cessation interventions way in advance of surgery.
-
Anesthesia and analgesia · Oct 2024
Use of Sugammadex in "Cannot Intubate, Cannot Ventilate" Scenarios: A Systematic Review of Case Reports.
After an induction dose of rocuronium, sugammadex in a dose of 16 mg.kg-1 has been shown to provide early reversal of the neuromuscular blockade. However, the use of sugammadex to rescue a "cannot intubate, cannot ventilate" (CICV) scenario remains controversial. The aim of this systematic review was to discuss case reports describing the use of sugammadex as a rescue reversal in CICV scenarios and analyze the influencing factors potentially shaping the outcome of such reversal. ⋯ Also, cases with both favorable and unfavorable outcomes may have not been published, and the heterogeneity of cases limits the ability to draw definitive conclusions. In summary, although these case reports suggest that sugammadex might be helpful in CICV scenarios, further research is needed to confirm its effectiveness. However, due to the rare occurrence of CICV events, gathering sufficient data for conclusive evidence may be challenging.