title: Abdominal fat suspension device for maintaining normal cardiorespiratory function in patients undergoing conscious sedation during surgery: a feasibility study.
abstract: Obese patients undergoing conscious-sedation surgery have increased perioperative morbidity because their excess abdominal tissue limits diaphragmatic excursion. We describe a simple device that might help attenuate this risk. We created a noninvasive suction device for abdominal suspension. By lifting the burden of excess weight, this device should decrease respiratory effort. To test the feasibility of excess weight removal in relieving cardiac stress, we tested 22 supine, healthy, normal-weight subjects by measuring their heart rates with and without a 13-kg tissue model on their abdomen to simulate excess weight. There was no significant difference in blood oxygen saturation before and after weight removal (P=0.318). However, the decrease in heart rate was significant (P <0.0001; paired 2-sample, one-tailed t test), which implies decreased respiratory effort. This result suggests the possibility that abdominal mass suspension in obese patients is associated with decreased respiratory effort.
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Norman F
authors.initials: NF
authors.lastname: Truong
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Joanna C
authors.initials: JC
authors.lastname: Nathan
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Daeun
authors.initials: D
authors.lastname: Yoon
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Ochoa
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Marisa
authors.initials: M
authors.lastname: Prevost
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Sehyun
authors.initials: S
authors.lastname: Yun
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Z Maria
authors.initials: ZM
authors.lastname: Oden
authors.affiliation: Department of Bioengineering (Dr. Oden, Ms Nathan, Mr. Ochoa, Ms Prevost, Mr. Truong, Ms Yoon, and Mr. Yun), Rice University, Houston, Texas 77005; and Department of Cardiology (Dr. Razavi), Texas Heart Institute, Houston, Texas 77030.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Razavi
mesh_terms: D050153:Abdominal Fat / Q000473:pathology*; D000293:Adolescent; D015415:Biomarkers / Q000097:blood; D016292:Procedural Sedation / Q000295:instrumentation*; D004867:Equipment Design; D005240:Feasibility Studies; D064368:Healthy Volunteers; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008168:Lung / Q000502:physiology*; D008422:Materials Testing; D009765:Obesity / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D010100:Oxygen / Q000097:blood; D056888:Patient Positioning; D012119:Respiration; D013396:Suction; D016683:Supine Position; D013514:Surgical Procedures, Operative; D013997:Time Factors; D016474:Weight-Bearing; D055815:Young Adult
chemical_list: D015415:Biomarkers; D010100:Oxygen
keywords: Abdominal fat; abdominal muscles/surgery; cardiorespiratory function; conscious sedation; hypnotics and sedatives; intraoperative care; obesity/blood/therapy; pressure