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Sonographic Evaluation of Visceral Fat After Bariatric Surgery

18 februari 2016 uppdaterad av: Ido Mizrahi, Hadassah Medical Organization

Sonographic Evaluation of Visceral and Subcutaneous Fat in Morbidly Obese Patients Before and After 3 Different Types of Bariatric Surgery.

Excess visceral fat is a key factor in the development of metabolic syndrome associated with obesity. After bariatric surgery, patients experience weight loss accompanied by a decrease in the amount of total body fat. It is unclear how the different surgical procedures vary in their effect on the visceral and subcutaneous fat change. Ultrasonography (US) is an effective, efficient method in assessing this metabolically active layer of fat even when compared with gold standard techniques such as computed tomography and magnetic resonance imaging. Only a few studies managed to show the actual decrease in the visceral fat layer after these kinds of surgeries. The aim is to compare by ultrasound evaluation the extent of fat layers reduction after laparoscopic adjustable gastric banding (LAGB), laparoscopic sleeve gastrectomy (LSG) and laparoscopic roux-en-y gastric bypass (LRYGB). The hypothesis is that the sleeve gastrectomy and gastric bypass being not only a restrictive procedure but also a malabsorptive procedure will have the best results in decreasing the amount of visceral fat.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

excess visceral fat is a key factor in the development of metabolic syndrome associated with obesity. After bariatric surgery, patients experience weight loss accompanied by a decrease in the amount of total body fat. It is unclear how the different surgical procedures vary in their effect in reducing the amount of the visceral fat layer . Ultrasonography (US) is an effective, efficient method in assessing this metabolically active layer of fat even when compared with gold standard techniques such as computed tomography and magnetic resonance imaging. Only a few studies managed to show the actual decrease in the visceral fat layer after these kinds of bariatric surgeries. The aim is to compare by ultrasound evaluation the extent of fat layers reduction after laparoscopic adjustable gastric banding (LAGB), laparoscopic sleeve gastrectomy (LSG) and laparoscopic roux-en-y gastric bypass (LRYGB).

Visceral fat (VF) will be defined as the depth, in centimeters, from the rectus abdominis muscle to the aorta; and subcutaneous fat (SCF) defined as the depth, in centimeters, from the skin to the rectus abdominis muscle. Results will be compared with anthropometric measures as weight and waist circumference as well as laboratory results to try and find correlation between sonographic improvement and anthropometric and laboratory improvement.

The hypothesis is that the sleeve gastrectomy and gastric bypass being not only a restrictive procedure but also a malabsorptive procedure will have the best results in decreasing the amount of visceral fat.

Studietyp

Observationell

Inskrivning (Faktisk)

39

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Israel
      • Jerusalem, Israel, 91120
        • Hadassah Medical Organization

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 70 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Testmetod

Icke-sannolikhetsprov

Studera befolkning

Morbid obese patients admitted electively to our surgery ward after receiving detailed explanation about each type of surgery and after independently choosing to undergo either a laparoscopic adjustable gastric banding, a sleeve gastrectomy or a gatsric bypass will be offered to participate in the study.

The patients must meet criteria for being morbid obese as defined as a body mass index greater than 40 kg/meter*meter or a body mass index greater than 35 with relevant comorbidities. The patients must meet other inclusion and exclusion criteria as defined below.

The patients will be offered to participate in the study regardless of their gender or race.

Beskrivning

Inclusion Criteria:

  • age above 18 years and below 70 years
  • patients considered to suffer from morbid obesity as defined as a body mass index above 40 kg/meter*meter or above 35 kg/meter*meter with comorbidities relevant to obesity such as : diabetes, hypertension, arthralgia, obstructive sleep apnea and hyperlipidemia and eligible for surgery
  • patients that electively and independently chose to undergo a bariatric surgery in our surgery ward.
  • patients expressing their desire to participate in the study and after signing informed consent.
  • patients that underwent a lecture about the pros and cons of the different types of bariatric surgery performed in our surgery ward:laparoscopic adjustable gastric banding, a sleeve gastrectomy or a gastric bypass and chose independently the type of surgery they want to undergo.
  • patients that tried to lose weight in conventional ways such as physical activity and diets with no success.

Exclusion Criteria:

  • patients under the age of 18 or above the age 70.
  • patients unable to read, understand, comprehend and sign the informed consent form.
  • patients not meeting the criteria for the definition morbid obesity as defined as a body mass index above 40 kg/meter*meter or above 35 kg/meter*meter with comorbidities relevant to obesity such as : diabetes, hypertension, arthralgia, obstructive sleep apnea and hyperlipidemia.
  • pregnant patients.
  • patients addicted to alcohol or other recreational drugs.
  • patients suffering from a malignant comorbidity.
  • patients suffering for a morbid obesity state because of a endocrine problem such as hypothyroidism or cushing disease.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Observationsmodeller: Endast fall
  • Tidsperspektiv: Blivande

Kohorter och interventioner

Grupp / Kohort
patients undergoing laparoscopic adjustable gastric banding
morbid obese patients undergoing laparoscopic adjustable gastric banding will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased.
patients undergoing laparoscopic sleeve gastrectomy
morbid obese patients undergoing laparoscopic sleeve gastrectomy will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased
patients undergoing laparoscopic gastric bypass
morbid obese patients undergoing laparoscopic gastric bypass will be evaluated by ultrasound before surgery and one year after surgery to determine the amount of visceral fat layer decreased

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Decrease in the Visceral Fat Layer Measured by Ultrasound a Day Before and a Year After Surgery.
Tidsram: 18 months
morbid obese patients undergoing a type of bariatric surgery either a laparoscopic gastric banding, a laparoscopic sleeve astrectomy or a laparoscopic gastric bypass, in our department will be evaluated by ultrasound 1 day before surgery and one year after surgery to determine the amount of visceral fat layer-by centimeters- that was decreased .
18 months

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in Glucose and Triglyceride Blood Level
Tidsram: 18 months
finding correlation between sonographic outcome using ultrasound, as measured by the decrease in the level of visceral fat-by centimeters, weight loss and blood levels of triglycerides and glucose.
18 months

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Hadassah Medical Organization

Utredare

  • Huvudutredare: Ido Mizrahi, M.D, Ministry of Health, Israel

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 januari 2011

Primärt slutförande (Faktisk)

1 januari 2014

Avslutad studie (Faktisk)

1 januari 2014

Studieregistreringsdatum

Först inskickad

10 januari 2011

Först inskickad som uppfyllde QC-kriterierna

27 januari 2011

Första postat (Uppskatta)

28 januari 2011

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

16 mars 2016

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

18 februari 2016

Senast verifierad

1 februari 2016

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • obesity17-HMO-CTIL

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

Nej

IPD-planbeskrivning

not planning on sharing data

Läkemedels- och apparatinformation, studiedokument

Studerar en amerikansk FDA-reglerad läkemedelsprodukt

Nej

Studerar en amerikansk FDA-reglerad produktprodukt

Nej

produkt tillverkad i och exporterad från U.S.A.

Nej

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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