Clinical trial NCT04412694: The Effect of Preoperative Oral Dexamethasone Supplementation on the Outcome of Thyroidectomised Patients.
Official title: The Impact of Preoperative Oral Dexamethasone Supplementation on the Biochemical Parameters and Results of Surgical Treatment in Patients With Nontoxic Multinodular Goiter Undergoing Total Thyroidectomy.
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: PHASE4
Conditions: Hypocalcemia
Vitamin D Deficiency
Postoperative Complications
Postoperative Nausea
Postoperative Pain
Voice Hoarseness
Hypoparathyroidism Postprocedural
Keywords: dexamethasone
hypocalcaemia
hypocalcemic symptoms
postoperative complications
vitamin D deficiency
cytokines
postoperative pain
postoperative nausea
postoperative vomiting
hoarseness
acute phase proteins
hypoparathyroidism
Lead sponsor: Medical University of Lodz
Sponsor class: OTHER
First posted: 2020-06-02
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Maximum age (years): 100
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Patients will be randomly assigned (coin toss) to the supplementation group (preoperative oral supplementation of dexamethasone (8mg in one dose) taken one hour before surgery) and to the placebo group (preoperative oral supplementation of sweetener taken one hour before surgery).
Primary purpose: PREVENTION

Brief summary: Glucocorticoids are well known for their analgesic, anti-inflammatory, immunomodulatory and anti-emetic effects. Recovery time after thyroid surgery may depend on several factors, such as postoperative pain, nausea and vomiting, postoperative sore throat, voice disorders and symptomatic hypocalcaemia (low serum calcium level). However, there is little information in the literature about the preventive use of glucocorticosteroids in patients undergoing thyroid surgery. The aim of the study is to evaluate the clinical impact of preoperative oral dexamethasone supplementation on the surgical outcome in patients with multinodular goiter undergoing total thyroidectomy. Patients will be assigned to the supplementation group and the placebo group. In the supplementation group 8mg of dexamethasone will be administered orally one hour before surgery. In the postoperative period, the frequency and intensity of pain, nausea, vomiting, sore throat and hoarseness will be assessed. The incidence of symptoms of hypocalcaemia will also be evaluted. Preoperative and postoperative levels of vitamin D, cytokines, acute phase proteins and substances related to calcium metabolism will be measured in the blood. Cytokines levels in drainage fluid will also be assessed. The main hypothesis of the study is that in patients with supplementation postoperative discomfort and decrease in serum calcium and parathormone level and hypocalcemic symptoms will be less severe and the levels of proinflammatory substances will be decreased.

Detailed description: Recovery time after thyroid surgery may depend on several factors, such as postoperative pain, nausea and vomiting, postoperative sore throat, phonation disorders associated with recurrent laryngeal nerve palsy, and symptomatic postoperative hypocalcaemia associated with postoperative hypoparathyroidism.

Glucocorticoids are well known for their analgesic, anti-inflammatory, immunomodulatory and anti-emetic effects. However, there is little information in the literature on the prophylactic use of glucocorticosteroids in patients undergoing thyroid surgery. In some previous studies, preoperative intravenous dexamethasone supplementation was associated with a reduced incidence of postoperative laryngeal nerve palsy, postoperative hypoparathyroidism, and with less severe postoperative pain, postoperative sore throat, nausea and vomiting. Patients receiving supplementation also had decreased levels of inflammatory biochemical parameters and proinflammatory cytokines.

Vitamin D deficiency is widespread in Poland. Vitamin D status has an impact on the postoperative complications in surgical patients. In previous study serum 25-hydroxyvitamin D is also suggested as a negative acute phase reactant, which has implications for acute and chronic inflammatory diseases. According to the authors, serum 25-hydroxyvitamin D level is an unreliable biomarker of vitamin D status after acute inflammatory insult.

In the early stages of inflammation, phagocytic cells and endothelium secrete proinflammatory cytokines, which include: interleukins: IL-1 α / β, IL-6, IL-8, TNF. The antagonistic group is anti-inflammatory cytokines, which include interleukins: IL-4, -5, -10, -13, produced by Th2 lymphocytes. These cytokines reduce the amount of interleukins secreted by Th1 lymphocytes.

Changes in the levels of proinflammatory and anti-inflammatory cytokines in the postoperative period were found in studies related to the assessment of surgical trauma. Pro-inflammatory interleukin 1 and interleukin 6 play an important role in many biological processes such as inflammation, sepsis and wound healing. Interleukin 6 expression is proportional to the extent of the surgical trauma. In turn, interleukin 10 is known as a cytokine that inhibits cytokine synthesis. Is one of the strongest immunosuppressive agents.

The aim of my study is to evaluate the impact of preoperative oral dexamethasone supplementation on the biochemical parameters and results of surgical treatment in patients with nontoxic multinodular goiter undergoing total thyroidectomy.

Patients admitted to the Department of General and Oncological Surgery, Medical University of Lodz with preoperative diagnosis of nontoxic multinodular goitre undergoing total thyroidectomy will be inculded to the study.

After obtaining written informed consent from all participants during a preoperative visit, they will be randomized to the supplementation group and the placebo group. The study will be a prospective, placebo-controlled and double-blind (for patient and surgeon) research.

Intervention: In the supplementation group a single dose of 8mg of dexamethasone will be given orally one hour before surgery (Dexamethasone Krka tablets (8mg), Warsaw, Poland). In the placebo group patients will receive a single tablet of sweetener one hour before operation (Clio tablets, sweetener with a dispenser, Instantina GES, Vienna, Austria).

Preoperatively in the group of all enrolled patients (in the supplementation group and in the placebo group) following tests will be measured in serum: blood count, calcium, inorganic phosphates, albumin, alkaline phosphatase, C reactive protein, procalcitonin, 25-hydroxyvitamin D, fibrinogen, parathormone, magnesium, interleukin 1β, interleukin 6, interleukin 10, thyroid stimulating hormone, free thyroxine, free triiodothyronine.

Total thyroidectomies with routine identification of the recurrent laryngeal nerves and parathyroid glands via a transverse cervicotomy under general anaesthesia will be performed by 3 experienced surgeons.

During the total thyroidectomy the number of parathyroid glands found intraoperatively will be registered.

At 6 hour after surgery in the group of all enrolled patients following tests will be measured in serum: blood count, calcium, inorganic phosphates, albumin, alkaline phosphatase, C reactive protein, procalcitonin, 25-hydroxyvitamin D, fibrinogen, parathormone, magnesium. In addiction, at 6 hour after surgery the incidence and intensity of symptomatic hypocalcaemia, postoperative pain (according to VAS scale), postoperative nausea and vomiting, postoperative sore throat and hoarseness will be evaluated.

At 24 hour after surgery in the group of all enrolled patients following tests will be measured in serum: blood count, calcium, inorganic phosphates, albumin, alkaline phosphatase, C reactive protein, procalcitonin, 25-hydroxyvitamin D, fibrinogen, parathormone, magnesium, interleukin 1β, interleukin 6, interleukin 10. Additionally, the level of interleukin 1β, interleukin 6 and interleukin 10 will be evaluated in drainage fluid. In addiction, at 24 hour after surgery the incidence and intensity of symptomatic hypocalcaemia, postoperative pain (according to Visual Analogue Scale - VAS scale), postoperative nausea and vomiting, postoperative sore throat and hoarseness will be evaluated.

The laboratory parameters will be determined by electrochemiluminescence on the Cobas E411 analyzer and spectrophotometric method on the AU680, Beckman Coulter analyzer. 25-hydroxyvitamin D levels will be measured using the chemiluminescent microparticle immunoassay (CMIA) (Architect 25-OHD). Interleukins levels will be determined by enzyme immunoassay method (EIA) (DGR Medtek) on ElizaMat 2 X analyzer.

Hypocalcemic symptoms will be categorized as mild (a tingling sensation and numbness of the hands or feet and perioral numbness) or severe (a positive Chvostek sign, Trousseau sign, tetany, and carpopedal spasms).

Postoperative hypocalcaemia will be defined as corrected calcium levels \<2.0 mmol/l, even if recorded in one measurement only.

In both groups participants who will develop postoperative hypoparathyroidism (parathormone level \<1.6 pmol/l at 6 or 24 hour after surgery) or symptomatic hypocalcaemia during hospitalisation will be treated with oral calcium (3 g/d - taken 1 g every 8 hours) and vitamin D derivatives (1 ug/d alfacalcidol taken once).

Intravenous calcium gluconate will be administered if symptoms persist despite oral supplementation.

Patients with symptomatic hypocalcaemia will receive supplementation until the symptoms subside. The treatment will be extended to 6 weeks in patients with hypoparathyroidism on the day of discharge.

The data will be statistically analysed. The main hypothesis of the study is that in patients with supplementation postoperative discomfort and decrease in serum calcium and parathormone level and hypocalcemic symptoms will be less severe and the levels of proinflammatory substances will be decreased. Vitamin D deficiency is probably common in operated patients and postoperative 25-hydroxyvitamin D levels are lower than those measured preoperatively.

The use of oral dexamethasone might be an effective strategy of prevention of complications after total thyroidectomy.

To the best of our knowledge, this is a pioneering study assessing the usefulness of preventive oral dexamethasone supplementation before total thyroidectomy in homogeneous group of patients with nontoxic multinodular goiter undergoing total thyroidectomy.

Eligibility criteria: Inclusion Criteria:

* patient's consent
* adult patients
* preoperative diagnosis of nontoxic multinodular goiter
* total thyroidectomy

Exclusion Criteria:

* lack of patient's consent
* hyperthyroidism currently or in the past
* retrosternal goiter
* thyroid malignanacy or suspected malignant thyroid tumor
* parathyroids disease
* malingant tumor in any location currently or in the past
* state after neck surgery
* state after radiotherapy
* bone diseases, osteoporosis
* sarcoidosis
* liver failure, hepatitis
* kidney stones, kidney failure (eGFR\<60ml/min/1.73m2)
* taking nonsteroidal anti-inflammatory drugs
* steroid treatment
* stomach and duodenal ulcer disease currently or in the past
* active infection at the time of the study
* history of tuberculosis
* a period of 8 weeks before and 2 weeks after administration of the live vaccine
* unregulated hypertension
* diabetes
* psychiatric disorders
* glaucoma
* corneal ulcers or corneal injuries
* severe heart failure
* pheochromocytoma
* myasthenia gravis
* epilepsy
* head injury
* ulcerative colitis
* diverticulitis
* pregnancy
* breast-feeding
* hypokalaemia
* galactose intolerance
* lactase deficiency
* dexamethasone allergy, allergic to lactose, allergic to gelatinized starch, allergic to corn starch, allergic to colloidal anhydrous silica, allergic to magnesium stearate
* allergic reaction to substances contained in the sweetener: sodium cyclamate, sodium saccharin, sodium bicarbonate, sodium citrate.
* taking medications that affect calcium metabolism: anti-resorptive drugs, anabolic drugs, bisphosphonates, systemic glucocorticosteroids, thiazide diuretics, furosemide, proton pump inhibitors, antacids containing magnesium or aluminum salts, cholestyramine, colestipol, paraffin oil, salicylates, estrogen-containing oral contraceptives (hormonal contraceptives) , preparations containing calcium salts (regular intake), preparations of vitamin D or its analogues (regular intake)
* taking medications that increase the side effect of dexamethasone or enter into drug interactions with dexamethasone: acetazolamide, loop diuretics, thiazide diuretics, diuretics, amphotericin B, glucocorticosteroids, mineralocorticosteroids, tetracosactide and laxatives, carbenoxolone, chlorokine, hydroxychlorokine and meflocin, angiotensin converting enzyme inhibitors, thalidomide, cholinesterase inhibitors in patients with myasthenia gravis, fluorochonolones, ephedrine, barbiturates, rifabutin, rifampicin, phenytoin and carbamazepine, aminoglutethimide, bile acid binding resins, such as cholestyramine, antacids,activated carbon, antifungal azoles, ketoconazole, HIV protease inhibitors, macrolide antibiotics, estrogens, anti-tuberculosis drugs (isoniazid), cyclosporin, praziquantel, oral anticoagulants (coumarin), atropine and other anticholinergic drugs, somatotropin, protirel.

Primary outcomes:
measure: Postoperative hypocalcaemia
timeFrame: preoperatively and at 6 and 24 hour after surgery
measure: Postoperative hypoparathyroidism
timeFrame: preoperatively and at 6 and 24 hour after surgery
Secondary outcomes:
measure: Postoperative pain
timeFrame: at 6 and 24 hour after surgery
measure: Postoperative nausea on a verbal rating scale
timeFrame: at 6 and 24 hour after surgery
measure: Postoperative vomiting on a verbal rating scale
timeFrame: at 6 and 24 hour after surgery
measure: Postoperative sore throat on a verbal rating scale
timeFrame: at 6 and 24 hour after surgery
measure: Postoperative hoarseness on a verbal rating scale
timeFrame: at 6 and 24 hour after surgery
Other outcomes:
measure: Cytokines in serum
timeFrame: preoperatively and at 6 and 24 hour after surgery
measure: Cytokines in drain fluid
timeFrame: at 24 hour after surgery
measure: Calcium phosphate homeostasis
timeFrame: preoperatively and at 6 and 24 hour after surgery
measure: Vitamin D
timeFrame: preoperatively and at 6 and 24 hour after surgery
measure: Acute phase proteins
timeFrame: preoperatively and at 6 and 24 hour after surgery
Locations:
city: Łódź
country: Poland
facility: Department of General and Oncological Surgery, Medical University of Lodz
state: Łódzkie
Study officials:
affiliation: Medical University of Lodz, Poland
name: Anna Grzegory, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Schietroma M, Cecilia EM, Carlei F, Sista F, De Santis G, Lancione L, Amicucci G. Dexamethasone for the prevention of recurrent laryngeal nerve palsy and other complications after thyroid surgery: a randomized double-blind placebo-controlled trial. JAMA Otolaryngol Head Neck Surg. 2013 May;139(5):471-8. doi: 10.1001/jamaoto.2013.2821.
citation: Yang C, Jung SM, Bae YK, Park SJ. The effect of ketorolac and dexamethasone on the incidence of sore throat in women after thyroidectomy: a prospective double-blinded randomized trial. Korean J Anesthesiol. 2017 Feb;70(1):64-71. doi: 10.4097/kjae.2017.70.1.64. Epub 2016 Nov 25.
citation: Calkosinski I, Dobrzynski M, Calkosinska M, Seweryn E, Bronowicka-Szydelko A, Dzierzba K, Ceremuga I, Gamian A. [Characterization of an inflammatory response]. Postepy Hig Med Dosw (Online). 2009 Sep 3;63:395-408. Polish.
citation: Waldron JL, Ashby HL, Cornes MP, Bechervaise J, Razavi C, Thomas OL, Chugh S, Deshpande S, Ford C, Gama R. Vitamin D: a negative acute phase reactant. J Clin Pathol. 2013 Jul;66(7):620-2. doi: 10.1136/jclinpath-2012-201301. Epub 2013 Mar 1.
citation: Bennett NT, Schultz GS. Growth factors and wound healing: biochemical properties of growth factors and their receptors. Am J Surg. 1993 Jun;165(6):728-37. doi: 10.1016/s0002-9610(05)80797-4.
citation: Gailit J, Clark RA. Wound repair in the context of extracellular matrix. Curr Opin Cell Biol. 1994 Oct;6(5):717-25. doi: 10.1016/0955-0674(94)90099-x.
citation: Sakamoto K, Arakawa H, Mita S, Ishiko T, Ikei S, Egami H, Hisano S, Ogawa M. Elevation of circulating interleukin 6 after surgery: factors influencing the serum level. Cytokine. 1994 Mar;6(2):181-6. doi: 10.1016/1043-4666(94)90040-x.
citation: Kalayci D, Dikmen B, Kacmaz M, Taspinar V, Ornek D, Turan O. [Plasma levels of interleukin-10 and nitric oxide in response to two different desflurane anesthesia flow rates]. Braz J Anesthesiol. 2014 Jul-Aug;64(4):292-8. doi: 10.1016/j.bjan.2013.06.009. Epub 2014 Jun 3. Portuguese.
citation: Delogu G, Antonucci A, Signore M, Marandola M, Tellan G, Ippoliti F. Plasma levels of IL-10 and nitric oxide under two different anaesthesia regimens. Eur J Anaesthesiol. 2005 Jun;22(6):462-6. doi: 10.1017/s0265021505000797.
citation: Turan A, Hesler BD, You J, Saager L, Grady M, Komatsu R, Kurz A, Sessler DI. The association of serum vitamin D concentration with serious complications after noncardiac surgery. Anesth Analg. 2014 Sep;119(3):603-612. doi: 10.1213/ANE.0000000000000096.
citation: Pludowski P, Ducki C, Konstantynowicz J, Jaworski M. Vitamin D status in Poland. Pol Arch Med Wewn. 2016 Aug 9;126(7-8):530-9. doi: 10.20452/pamw.3479. Epub 2016 Aug 9.