Anxiety and Phenylephrine Dosage

NCT03696732 | Unknown

• 1 other identifier: 450-18
• Study Type: observational
• Target: 100
• Locations: 1 country
• Sites: 1

Brief Summary

Spinal anesthesia is considered gold standard anesthetic technique of choice for cesarean delivery (1). However its use is frequently associated with maternal hypotension, which occurs in up to 71% of cases, without prophylactic treatment(2) Spinal hypotension can lead to unpleasant maternal side effects such as nausea, vomiting and dizziness. In addition, adverse effects on the neonate occur because of reduced uteroplacental blood flow resulting in impaired fetal oxygenation and fetal acidosis. As such, current research recommends the prophylactic use of vasopressors for improved maternal and fetal outcomes(3). The international consensus statement on the management of hypotension during cesarean delivery states, that a prophylactic phenylephrine infusion is superior to bolus administration and should be dose titrated according to blood pressure parameters (4). In according to the international guidelines, in our obstetric anesthesia unit, we use a standardized spinal anesthetic regime protocol with a standardized prophylactic phenylephrine infusion at a rate of 50 mcg/min, with the vasopressor dose titrated according to every minute blood pressure parameters. Spinal anesthesia causes maternal hypotension, resulting from a blockade of sympathetic efferent neurons. Patients with higher baseline sympathetic activation have been known to have more marked hypotension after spinal anesthesia (5, 6) Anxiety causes generalized sympathetic activation (7). In a previous research the investigators showed that preoperative anxiety assessed by VAS had a significant effect on hypotension after spinal anesthesia (8). Study objective: In this study the investigators aim to evaluate the effect of anxiety on the cumulative phenylephrine dosage in women undergoing cesarean delivery under spinal anesthesia with prophylactic phenylephrine infusion. The primary hypothesis is that parturients who suffer from preoperative anxiety measured by a verbal numerical scale (VNS) anxiety score and Spielberger State-Trait Inventory questionnaire, will receive higher cumulative doses of phenylephrine (resulting from higher incidence of maternal hypotension).

Conditions

Phenylephrine

Outcome Measures

Primary Outcomes (1)

• Total cumulative phenylephrine dosage in women undergoing cesarean delivery under spinal anesthesia with prophylactic phenylephrine infusion.

  During surgery -2 hours

Study Arms (1)

Women undergoing cesarean section

Women undergoing cesarean section under spinal anesthesia with prophylactic phenylephrine drip.

Other: Anxiety questionnaire; Other: VAS questionnaire

Interventions

Anxiety questionnaire OTHER

Spielberger. State-Trait Inventory questionnaire

Women undergoing cesarean section

VAS questionnaire OTHER

verbal numerical scale (VNS) anxiety score

Women undergoing cesarean section

Eligibility Criteria

• Age: 18 Years+
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Two hundred healthy term parturients, over 18 years old, with healthy singleton pregnancy, undergoing cesarean delivery under spinal anesthesia in Beilinson Hospital, following obtaining written informed consents forums with the ability to comply with the study requirements will be included in our study.

You may qualify if:

• Healthy parturients undergoing cesarean delivery under spinal anesthesia in Beilinson Hospital.

You may not qualify if:

• Women in active labor
• Women with a twin pregnancy
• Women with chronic hypertension or hypertension or preeclampsia.
• Active medical or psychiatric disorders requiring regular medication.
• Women who have any contraindication for spinal anesthesia.

Sponsors & Collaborators

• Rabin Medical Center: lead

Study Sites (1)

Beilinson hospital

Petach Tikvah, Israel

RECRUITING

Related Publications (10)

• Klohr S, Roth R, Hofmann T, Rossaint R, Heesen M. Definitions of hypotension after spinal anaesthesia for caesarean section: literature search and application to parturients. Acta Anaesthesiol Scand. 2010 Sep;54(8):909-21. doi: 10.1111/j.1399-6576.2010.02239.x. Epub 2010 Apr 23.

  PMID: 20455872 BACKGROUND

• Reynolds F, Seed PT. Anaesthesia for Caesarean section and neonatal acid-base status: a meta-analysis. Anaesthesia. 2005 Jul;60(7):636-53. doi: 10.1111/j.1365-2044.2005.04223.x.

  PMID: 15960713 BACKGROUND

• Higgins N, Fitzgerald PC, van Dyk D, Dyer RA, Rodriguez N, McCarthy RJ, Wong CA. The Effect of Prophylactic Phenylephrine and Ephedrine Infusions on Umbilical Artery Blood pH in Women With Preeclampsia Undergoing Cesarean Delivery With Spinal Anesthesia: A Randomized, Double-Blind Trial. Anesth Analg. 2018 Jun;126(6):1999-2006. doi: 10.1213/ANE.0000000000002524.

  PMID: 28953494 BACKGROUND

• Kinsella SM, Carvalho B, Dyer RA, Fernando R, McDonnell N, Mercier FJ, Palanisamy A, Sia ATH, Van de Velde M, Vercueil A; Consensus Statement Collaborators. International consensus statement on the management of hypotension with vasopressors during caesarean section under spinal anaesthesia. Anaesthesia. 2018 Jan;73(1):71-92. doi: 10.1111/anae.14080. Epub 2017 Nov 1. No abstract available.

  PMID: 29090733 BACKGROUND

• Hanss R, Bein B, Ledowski T, Lehmkuhl M, Ohnesorge H, Scherkl W, Steinfath M, Scholz J, Tonner PH. Heart rate variability predicts severe hypotension after spinal anesthesia for elective cesarean delivery. Anesthesiology. 2005 Jun;102(6):1086-93. doi: 10.1097/00000542-200506000-00005.

  PMID: 15915018 BACKGROUND

• Hanss R, Ohnesorge H, Kaufmann M, Gaupp R, Ledowski T, Steinfath M, Scholz J, Bein B. Changes in heart rate variability may reflect sympatholysis during spinal anaesthesia. Acta Anaesthesiol Scand. 2007 Nov;51(10):1297-304. doi: 10.1111/j.1399-6576.2007.01455.x.

  PMID: 17944631 BACKGROUND

• Roth WT, Doberenz S, Dietel A, Conrad A, Mueller A, Wollburg E, Meuret AE, Barr Taylor C, Kim S. Sympathetic activation in broadly defined generalized anxiety disorder. J Psychiatr Res. 2008 Feb;42(3):205-12. doi: 10.1016/j.jpsychires.2006.12.003. Epub 2007 Jan 23.

  PMID: 17250853 BACKGROUND

• Orbach-Zinger S, Ginosar Y, Elliston J, Fadon C, Abu-Lil M, Raz A, Goshen-Gottstein Y, Eidelman LA. Influence of preoperative anxiety on hypotension after spinal anaesthesia in women undergoing Caesarean delivery. Br J Anaesth. 2012 Dec;109(6):943-9. doi: 10.1093/bja/aes313. Epub 2012 Sep 10.

  PMID: 22964265 BACKGROUND

• Vogelsang J. The Visual Analog Scale: an accurate and sensitive method for self-reporting preoperative anxiety. J Post Anesth Nurs. 1988 Aug;3(4):235-9. No abstract available.

  PMID: 2457102 BACKGROUND

• Kindler CH, Harms C, Amsler F, Ihde-Scholl T, Scheidegger D. The visual analog scale allows effective measurement of preoperative anxiety and detection of patients' anesthetic concerns. Anesth Analg. 2000 Mar;90(3):706-12. doi: 10.1097/00000539-200003000-00036.

  PMID: 10702461 BACKGROUND

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Professor

Study Record Dates

• First Submitted: October 3, 2018
• First Posted: October 5, 2018
• Study Start: October 20, 2018
• Primary Completion: October 20, 2019
• Study Completion: October 20, 2019
• Last Updated: September 20, 2019

Record last verified: 2019-09

Locations

IL (1)