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- Klinische proef NCT01045876
The Effect of Dexamethasone on Cortisol Levels in Patients Undergoing Thyroid Surgery
The Effect of Dexamethasone on Plasma Cortisol Levels, Pain and PONV in Female Patients Undergoing Thyroid Surgery
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
Purpose To examine the effect of dexamethasone, on plasma cortisol levels, postoperative pain, nausea and vomiting in patients undergoing thyroid surgery.
Hypothesis That dexamethasone administered at induction of anesthesia will result in reduced plasma cortisol levels, postoperative pain, nausea and vomiting.
Justification Dexamethasone is a synthetic steroid medication used routinely to prevent nausea and vomiting in patients undergoing general anesthetic. Administration of exogenous steroids can suppress production of endogenous steroids including cortisol.
Currently, no data exists describing the degree of suppression of cortisol production by a single preoperative dose of dexamethasone. This information would guide physicians prescribing dexamethasone in the perioperative period.
Objectives To compare plasma cortisol levels in patients receiving dexamethasone versus placebo at induction of anesthesia. To investigate the effect of dexamethasone on postoperative pain, nausea and vomiting.
Research Methods A prospective, randomized, controlled, double-blinded study conducted at a single center. Thirty patients will be recruited and randomly assigned to dexamethasone or placebo groups, in accordance with sample size calculations. A placebo group is necessary to eliminate the effects of potential confounding factors.
Statistical Analysis An interim analysis will be conducted to confirm the sample size calculation. Plasma cortisol level will be analyzed using 2-way analysis of variance (ANOVA). Secondary outcome measures will be analyzed with appropriate parametric or nonparametric methods.
Studietype
Fase
- Fase 4
Contacten en locaties
Studie Locaties
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British Columbia
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Vancouver, British Columbia, Canada, V6Z 1Y6
- St Paul's Hospital
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Beschrijving
Inclusion Criteria:
- Female adult patients
- Undergoing thyroid surgery
- Euthyroid patients
- Qualify as Class I or II according to the American Society of Anesthesiologists physical status classification system
- Written informed consent
Exclusion Criteria:
Patients who have medical conditions associated with abnormalities of the hypothalamic-pituitary-adrenal axis which might alter plasma cortisol levels will be excluded from the study. This category includes the following conditions:
- A diagnosis of anxiety, depression or bipolar disorder
- Disorders of the central nervous system, pituitary gland or hypothalamic-pituitary-adrenal axis
- Diabetes mellitus
- Pathological conditions affecting cortisol metabolism, including liver disease
- Chronic renal failure
- Alcoholism
- Obesity
- Anorexia nervosa/ starvation
- High estrogen states, including pregnancy or use of OCP
Patients taking medication which might alter the normal function of the hypothalamic-pituitary-adrenal axis. This category includes:
- Patients taking exogenous steroid medication which would suppress normal cortisol production.
- Patients taking medication which alters steroid metabolism, including barbiturates, phenytoin and rifampicin.
- Patients who have a known history of allergy, sensitivity or any other form of reaction to dexamethasone will be excluded from this study as they would be at risk of further reaction to dexamethasone.
- Patients who have previously been included in this study will be excluded from further recruitment.
- Patients who will undergo lateral neck dissection in association with the thyroid surgery will be excluded from the study as they will experience greater pain levels.
- Patients who participate in other clinical studies during this study or in the 14 days prior to admission to this study will be excluded
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Verviervoudigen
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Placebo-vergelijker: Placebo
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2 ml of 0.9% Saline Solution administered intravenously at induction of anesthesia
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Experimenteel: Dexamethason
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One dose of 8 mg of Dexamethasone intravenously at induction of anesthesia
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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Plasma Cortisol level.
Tijdsspanne: One, eight and twenty-four hours following Dexamethasone administration.
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One, eight and twenty-four hours following Dexamethasone administration.
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Secundaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
|---|---|
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Incidence of postoperative nausea and vomiting.
Tijdsspanne: Twenty-four hours following surgery.
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Twenty-four hours following surgery.
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Pain intensity measured on the visual analogue scale.
Tijdsspanne: Twenty-four hours following surgery
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Twenty-four hours following surgery
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Plasma Estradiol level.
Tijdsspanne: One, eight and twenty-four hours following dexamethasone administration.
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One, eight and twenty-four hours following dexamethasone administration.
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Plasma Progesterone level.
Tijdsspanne: One, eight and twenty-four hours following dexamethasone administration
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One, eight and twenty-four hours following dexamethasone administration
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Plasma ACTH level
Tijdsspanne: One, eight and twenty-four hours following dexamethasone administration.
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One, eight and twenty-four hours following dexamethasone administration.
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Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Jill A Osborn, MD, St Paul's Hospital, Vancouver and University of British Columbia
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Verwacht)
Studie voltooiing (Verwacht)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Schatting)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
- Endocriene systeemziekten
- Bijnierziekten
- Bijnierinsufficiëntie
- Fysiologische effecten van medicijnen
- Autonome agenten
- Agenten van het perifere zenuwstelsel
- Ontstekingsremmende middelen
- Antineoplastische middelen
- Anti-emetica
- Gastro-intestinale middelen
- Glucocorticoïden
- Hormonen
- Hormonen, hormoonvervangers en hormoonantagonisten
- Antineoplastische middelen, hormonaal
- Dexamethason
Andere studie-ID-nummers
- SPH-1515-DA
Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .
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