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Functional endoscopic sinus surgery (FESS) is indicated in diseases such as chronic sinusitis refractory to medical treatment, nasal polyposis, mass lesions in the nasal cavity. The purpose of this study is to determine whether tramadol and metoprolol are as effective as remifentanil in providing controlled hypotension during FESS.
This study aims to compare two techniques for controlled hypotension during FESS. In both cases, the patients will be evaluated during the preoperative anesthetic visit, and will be given care by an anesthesiologist during the perioperative period.
Patients who are scheduled for an elective FESS operation will be included in the study. During the preoperative anaesthetic visit, patients who do not meet any of the the exclusion criteria will be offered to participate in hte study. Patients accepting to contribute tot he study will be randomised into one of the two groups via closed envelope technique.
A pilot study with 20 patients resulted in similar means and slightly different standard deviations of mean blood pressure. This pilot study showed that 44 patients in each group are sufficient to obtain 80% power with an alpha error of 0.05 and beta error of 20%. To compensate for missing/inconsistent data, or allow for better matching of the demographic variables, 3-5 additional patients will be recruited.
The anesthesiologist in charge of the patient will not be blinded to the groups, and will be responsible for maintaining the hypotension (and patient safety) with either remifentanil in one group, or tramadol and metoprolol in the other group. Systolic, diastolic, and mean blood pressures, and heart rate will be recorded into a spreadsheet every three minutes during the anaesthetic and surgical period. The data will be recorded via an excel form, which will validate the entries upon entrance. The accuracy and completeness of registry data will be verified by a third investigator, who will compare the registry data to the medical monitor records at the end of each operative day.
The surgeon will be blinded to the groups, and will be responsible for scoring the surgical vision and bleeding with the intraoperative bleeding score. The study drugs will be administered via the same type of infusion pump to facilitate the blinding process.
Any adverse event will be reported in the patient chart and study records.
Statistical analysis will be carried out using R and Statistical Package for the Social Sciences (SPSS) programs. Demographic variables (age, gender, American Society of Anesthesiologists (ASA) score, comorbidities) will be analysed using descriptive statistics. Study variables such as duration of operation, variance of the hemodynamic parameters, amount of bleeding, bleeding score, occurrence of adverse events will be analysed with the appropriate statistical tests.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| remifentanil | Active Comparator | Following an intravenous bolus dose of 0.5 µg/kg remifentanil administered just before the induction of anaesthesia, patients will receive an intravenous infusion of remifentanil at a dose of 0.25-0.5 µg/kg/min throughout the surgery. The rate of infusion will be adjusted to maintain a mean blood pressure within %70-80 of the baseline value. At the end of the surgery, the rate of infusion will be decreased to 0.05 µg/kg/min, and continued until the patient is extubated. |
|
| tramadol + metoprolol | Active Comparator | Just before the induction of anaesthesia, an intravenous infusion of 1 mg/kg of tramadol in 100 ml isotonic fluid will be started. The infusion will be completed in 30 minutes using a perfusor. Additionally, following the administration of the neuromuscular blocking agent, 0.1 mg/kg of intravenous metoprolol will be administered within 5 minutes. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Remifentanil | Drug | Remifentanil infusion will be started with a bolus dose of 0.5 µg/kg before the induction, and will be continued throughout the surgery at a dose of 0.25-0.5 µg/kg/min. At the end of the surgery, the rate of infusion will be decreased to 0.05 µg/kg/min, and continued until the patient is extubated. |
| Measure | Description | Time Frame |
|---|---|---|
| Intraoperative Bleeding Score | Intraoperative bleeding score is reported by the surgeon according to Boezaart Surgical Field Grading scale. The scale ranges from 0 to 5. '0' is the best, and '5' is the worst outcome. The scale construct is: 0 No bleeding.
Thoroughout the intraoperative period, the surgeon is free to report a score at any time he/she sees appropriate. | throughout surgery, up to 3 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Time to Achieve Intraoperative Bleeding Score < 3 | The intraoperative bleeding score will be reported by the surgeon throughout surgery. At the start of the surgery, a timer will be used to measure the duration to achieve a bleeding score of 2. | throughout surgery, up to 20 minutes |
| Bleeding Rate |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Başar Erdivanlı, Asst. Prof. | Recep Tayyip Erdogan University, Medical Faculty, Department of Anesthesiology | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Recep Tayyip Erdogan University | Rize | Eastern Blacksea | 53100 | Turkey (Türkiye) |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 24403974 | Background | Hosemann W, Draf C. Danger points, complications and medico-legal aspects in endoscopic sinus surgery. GMS Curr Top Otorhinolaryngol Head Neck Surg. 2013 Dec 13;12:Doc06. doi: 10.3205/cto000098. | |
| 21467830 | Background | Cincikas D, Ivaskevicius J, Martinkenas JL, Balseris S. A role of anesthesiologist in reducing surgical bleeding in endoscopic sinus surgery. Medicina (Kaunas). 2010;46(11):730-4. |
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We are still evaluating the guideline of the Medical Research Council (MRC) Hubs for Trials Methodology Research (HTMR) for individual participant data sharing.
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A total of 105 patients were evaluated. Three patients declined to participate in the study. Eleven patients did not meet inclusion criteria. On 29 December 2015, we reached the target number of patients (88). Since patients were matched for severity of sinonasal disease, we evaluated three more patients anticipating possible dropouts.
Recruitment period started at 27.06.2015. Recruitment was performed by an anaesthesiologist at the outpatient polyclinic for anaesthesiology.
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| ID | Title | Description |
|---|---|---|
| FG000 | Remifentanil | Following an intravenous bolus dose of 0.5 µg/kg remifentanil administered just before the induction of anaesthesia, patients will receive an intravenous infusion of remifentanil at a dose of 0.25-0.5 µg/kg/min throughout the surgery. The rate of infusion will be adjusted to maintain a mean blood pressure within %70-80 of the baseline value. At the end of the surgery, the rate of infusion will be decreased to 0.05 µg/kg/min, and continued until the patient is extubated. |
| FG001 | Tramadol + Metoprolol | Just before the induction of anaesthesia, an intravenous infusion of 1 mg/kg of tramadol in 100 ml isotonic fluid will be started. The infusion will be completed in 30 minutes using a perfusor. Additionally, following the administration of the neuromuscular blocking agent, 0.1 mg/kg of intravenous metoprolol will be administered within 5 minutes. |
| Title | Milestones | Reasons Not Completed | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
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| ID | Title | Description |
|---|---|---|
| BG000 | Remifentanil | Following an intravenous bolus dose of 0.5 µg/kg remifentanil administered just before the induction of anaesthesia, patients will receive an intravenous infusion of remifentanil at a dose of 0.25-0.5 µg/kg/min throughout the surgery. The rate of infusion will be adjusted to maintain a mean blood pressure within %70-80 of the baseline value. At the end of the surgery, the rate of infusion will be decreased to 0.05 µg/kg/min, and continued until the patient is extubated. |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Continuous | Mean |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Intraoperative Bleeding Score | Intraoperative bleeding score is reported by the surgeon according to Boezaart Surgical Field Grading scale. The scale ranges from 0 to 5. '0' is the best, and '5' is the worst outcome. The scale construct is: 0 No bleeding.
Thoroughout the intraoperative period, the surgeon is free to report a score at any time he/she sees appropriate. | Posted | Median | Inter-Quartile Range | units on a scale | throughout surgery, up to 3 hours |
|
6 months
Adverse event data were collected during the whole study period.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Remifentanil | Following an intravenous bolus dose of 0.5 µg/kg remifentanil administered just before the induction of anaesthesia, patients will receive an intravenous infusion of remifentanil at a dose of 0.25-0.5 µg/kg/min throughout the surgery. The rate of infusion will be adjusted to maintain a mean blood pressure within %70-80 of the baseline value. At the end of the surgery, the rate of infusion will be decreased to 0.05 µg/kg/min, and continued until the patient is extubated. |
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Intraoperative hypotension | Cardiac disorders | Systematic Assessment | Occurrence of intraoperative hypotension defined as a drop in mean blood pressure by > 30% from baseline. |
| Term | Organ System | Source Vocabulary | Assessment Type | Notes | Statistical Information |
|---|---|---|---|---|---|
| Adverse hemodynamic event in the surgical ward | Cardiac disorders | Systematic Assessment | Occurrence of any adverse hemodynamic event (hypertensive episode, hypotensive episode, tachycardia, bradycardia). |
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Dr. Başar Erdivanlı | Recep Tayyip Erdoğan Üniversitesi | 04642130491 | 2128 | berdivanli@gmail.com |
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| ID | Term |
|---|---|
| D009298 | Nasal Polyps |
| ID | Term |
|---|---|
| D009668 | Nose Diseases |
| D012140 | Respiratory Tract Diseases |
| D010038 | Otorhinolaryngologic Diseases |
| D011127 | Polyps |
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| ID | Term |
|---|---|
| D000077208 | Remifentanil |
| D014147 | Tramadol |
| D008790 | Metoprolol |
| ID | Term |
|---|---|
| D011422 | Propionates |
| D000144 | Acids, Acyclic |
| D002264 | Carboxylic Acids |
| D009930 | Organic Chemicals |
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|
|
| Tramadol | Drug | 1 mg/kg tramadol will be added to 100 ml of isotonic fluid, and will be administered intravenously in exactly 30 minutes via a perfusor. The infusion will be started just before the induction. |
|
|
| Metoprolol | Drug | 0.1 mg/kg of metoprolol will be administered intravenously within 5 minutes following the administration of neuromuscular blocking agent. |
|
|
In the end of each surgery, bleeding rate will be calculated as ml/min by dividing total bleeding (amount of blood in the graded suction and sponges minus total irrigation fluid) to the duration of surgery (excluding local anesthetic infiltration, and nasal packing). |
| throughout surgery, up to 3 hours |
| Postoperative Pain | Postoperative pain scores on the day of surgery will be evaluated with a visual analog scale (0: no pain, 10: worst pain ever) at the post anaesthetic care unit (PACU), and the surgical ward. The evaluation will begin after the patient arrives at the post anaesthetic care unit, and will continue for 24 hours. | following extubation, up to 24 hours |
| Number of Participants With Postoperative Nausea and Vomiting | Postoperative nausea, retching, and vomiting on the day of surgery will be evaluated with a four-point ordinal scale (0-none, 1-nausea, 2-retching, 3-vomiting) at the post anaesthetic care unit, and the surgical ward. The evaluation will begin after the patient arrives at the post anaesthetic care unit, and will continue for 24 hours. | following extubation, up to 24 hours |
| 19128632 | Background | Lin D, Dalgorf D, Witterick IJ. Predictors of unexpected hospital admissions after outpatient endoscopic sinus surgery: retrospective review. J Otolaryngol Head Neck Surg. 2008 Jun;37(3):309-11. |
| 17991265 | Background | Komatsu R, Turan AM, Orhan-Sungur M, McGuire J, Radke OC, Apfel CC. Remifentanil for general anaesthesia: a systematic review. Anaesthesia. 2007 Dec;62(12):1266-80. doi: 10.1111/j.1365-2044.2007.05221.x. |
| 16444651 | Background | Rathjen T, Bockmuhl U, Greim CA. [Modern anesthesiologic concepts supporting paranasal sinus surgery]. Laryngorhinootologie. 2006 Jan;85(1):20-3. doi: 10.1055/s-2005-870562. German. |
| 16856048 | Background | Khalil HS, Nunez DA. Functional endoscopic sinus surgery for chronic rhinosinusitis. Cochrane Database Syst Rev. 2006 Jul 19;2006(3):CD004458. doi: 10.1002/14651858.CD004458.pub2. |
| 15816598 | Background | Sartcaoglu F, Celiker V, Basgul E, Yapakci O, Aypar U. The effect of hypotensive anaesthesia on cognitive functions and recovery at endoscopic sinus surgery. Eur J Anaesthesiol. 2005 Feb;22(2):157-9. doi: 10.1017/s0265021505230284. No abstract available. |
| BG001 | Tramadol + Metoprolol | Just before the induction of anaesthesia, an intravenous infusion of 1 mg/kg of tramadol in 100 ml isotonic fluid will be started. The infusion will be completed in 30 minutes using a perfusor. Additionally, following the administration of the neuromuscular blocking agent, 0.1 mg/kg of intravenous metoprolol will be administered within 5 minutes. |
| BG002 | Total | Total of all reporting groups |
| years |
|
| Sex: Female, Male | Count of Participants | Participants |
|
| American Society of Anesthesiologists physical status | American Society of Anesthesiologists (ASA) physical status 1 denotes a normal healthy patient. This means a healthy, non-smoking person who exhibits no or minimal alcohol use. ASA physical status 2 denotes a patient with mild systemic disease (mild diseases only without substantive functional limitations). Examples include (but not limited to): current smoker, social alcohol drinker, pregnancy, obesity (30 < body mass index < 40), well-controlled diabetes mellitus/hypertension, mild lung disease. | Count of Participants | Participants |
|
| Lund-Mackay score | Various staging systems have been proposed for use in chronic rhinosinusitis. Many studies use the Lund-Mackay scale to evaluate radiographic images. This scale grades the right and left sides independently, looking at the maxillary, anterior ethmoids, posterior ethmoids, sphenoid, and frontal sinuses, as well as the ostiomeatal complex. Each sinus is scored a 0 (no abnormality), 1 (partial opacification), or 2 (total opacification), while the ostiomeatal complex is scored either a 0 or 2 (for presence or absence of disease). Scores range from 0-24. | Median | Inter-Quartile Range | units on a scale |
|
| Prothrombin time | Prothrombin time is a blood test that measures the time it takes for the liquid portion of the blood to clot. If a person is not taking blood thinning medicines, the normal range is 11 to 13.5 seconds. | Mean | Standard Deviation | seconds |
|
| Partial thromboplastin time | Partial thromboplastin time is a blood test that looks at how long it takes for blood to clot. In general, clotting should occur within 25 to 35 seconds. If the person is taking blood thinners, clotting takes up to two-and-a-half times longer. | Mean | Standard Deviation | seconds |
|
| International normalized ratio | Prothrombin time is a blood test that measures the time it takes for the liquid portion (plasma) of the blood to clot. Prothrombin time is measured in seconds. Most of the time, results are given as what is called international normalized ratio (INR). | Mean | Standard Deviation | international normalized ratio |
|
| Haemoglobin | The haemoglobin test is a blood test that measures how much haemoglobin is in the blood. Haemoglobin is a protein in red blood cells that carries oxygen. Normal results for adults vary, but in general are: Male: 13.8 to 17.2 grams per deciliter (g/dl) Female: 12.1 to 15.1 g/dl | Mean | Standard Deviation | grams per deciliter |
|
| Platelet count | A platelet count is a lab test to measure how many platelets are present in the blood. Platelets are parts of the blood that help the blood clot. The normal number of platelets in the blood is 150 000 to 400 000 platelets per microliter (mcl). Normal value ranges may vary slightly. | Mean | Standard Deviation | 10^3 platelets per microliter |
|
| OG001 | Tramadol + Metoprolol | Just before the induction of anaesthesia, an intravenous infusion of 1 mg/kg of tramadol in 100 ml isotonic fluid will be started. The infusion will be completed in 30 minutes using a perfusor. Additionally, following the administration of the neuromuscular blocking agent, 0.1 mg/kg of intravenous metoprolol will be administered within 5 minutes. |
|
|
|
| Secondary | Time to Achieve Intraoperative Bleeding Score < 3 | The intraoperative bleeding score will be reported by the surgeon throughout surgery. At the start of the surgery, a timer will be used to measure the duration to achieve a bleeding score of 2. | Posted | Mean | Standard Deviation | minutes | throughout surgery, up to 20 minutes |
|
|
|
|
| Secondary | Bleeding Rate | In the end of each surgery, bleeding rate will be calculated as ml/min by dividing total bleeding (amount of blood in the graded suction and sponges minus total irrigation fluid) to the duration of surgery (excluding local anesthetic infiltration, and nasal packing). | Posted | Mean | Standard Deviation | ml/min | throughout surgery, up to 3 hours |
|
|
|
|
| Secondary | Postoperative Pain | Postoperative pain scores on the day of surgery will be evaluated with a visual analog scale (0: no pain, 10: worst pain ever) at the post anaesthetic care unit (PACU), and the surgical ward. The evaluation will begin after the patient arrives at the post anaesthetic care unit, and will continue for 24 hours. | Posted | Median | Inter-Quartile Range | units on a scale | following extubation, up to 24 hours |
|
|
|
|
| Secondary | Number of Participants With Postoperative Nausea and Vomiting | Postoperative nausea, retching, and vomiting on the day of surgery will be evaluated with a four-point ordinal scale (0-none, 1-nausea, 2-retching, 3-vomiting) at the post anaesthetic care unit, and the surgical ward. The evaluation will begin after the patient arrives at the post anaesthetic care unit, and will continue for 24 hours. | Posted | Count of Participants | Participants | following extubation, up to 24 hours |
|
|
|
|
| 21 |
| 44 |
| 0 |
| 44 |
| EG001 | Tramadol + Metoprolol | Just before the induction of anaesthesia, an intravenous infusion of 1 mg/kg of tramadol in 100 ml isotonic fluid will be started. The infusion will be completed in 30 minutes using a perfusor. Additionally, following the administration of the neuromuscular blocking agent, 0.1 mg/kg of intravenous metoprolol will be administered within 5 minutes. | 0 | 44 | 0 | 44 |
|
| Intraoperative bradycardia | Cardiac disorders | Systematic Assessment | Occurrence of intraoperative bradycardia defined as heart rate below 50 beats per min. |
|
| Intraoperative bleeding | Blood and lymphatic system disorders | Systematic Assessment | Occurrence of intraoperative bleeding serious enough to cause a postponement or cancellation of surgery. |
|
|
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| D020763 |
| Pathological Conditions, Anatomical |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D010880 |
| Piperidines |
| D006573 | Heterocyclic Compounds, 1-Ring |
| D006571 | Heterocyclic Compounds |
| D003511 | Cyclohexanols |
| D000441 | Hexanols |
| D005233 | Fatty Alcohols |
| D000438 | Alcohols |
| D004123 | Dimethylamines |
| D008744 | Methylamines |
| D000588 | Amines |
| D008055 | Lipids |
| D050198 | Phenoxypropanolamines |
| D011412 | Propanolamines |
| D000605 | Amino Alcohols |
| D020005 | Propanols |
| Chi-squared |
| 0.55 |
| Superiority |