The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Ala I Sharara - One of the best experts on this subject based on the ideXlab platform.
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
Gastrointestinal Endoscopy, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Abstract Background: Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation ( p lt; 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte. (Gastrointest Endosc 2003;58:36-40.)
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
United European Gastroenterology Week, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation (p < 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte.
Hiroyuki Ohshima - One of the best experts on this subject based on the ideXlab platform.
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On the maximum of the magnitude of the electrophoretic mobility of a spherical colloidal particle in an Electrolyte Solution
Colloid and Polymer Science, 2016Co-Authors: Hiroyuki OhshimaAbstract:The magnitude of the electrophoretic mobility μ of a spherical colloidal particle in an Electrolyte Solution with κa > 3 ( κ = the Debye-Hückel parameter of the Electrolyte Solution and a = particle radius), when plotted as a function of the particle zeta potential ζ , exhibits a maximum μ _max at ζ = ζ _max. Analytic expressions applicable for large κa ( κa ≥ 30) are derived for μ _max and ζ _max for a spherical particle in a symmetrical Electrolyte Solution. Analytic expressions for μ _max and ζ _max are also derived for a spherical particle in a 2:1 or 1:2 Electrolyte Solution. Finally, it is to be noted that μ _max and ζ _max for a cylindrical particle of radius a when the particle is oriented perpendicular to the applied electric field are the same as those for a spherical particle of radius a for large κa ( κa ≥ 30).
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The Donnan potential-surface potential relationship for a cylindrical soft particle in an Electrolyte Solution.
Journal of colloid and interface science, 2008Co-Authors: Hiroyuki OhshimaAbstract:Transcendental equations, which avoid integration of the nonlinear Poisson-Boltzmann equations, are presented for obtaining the relationship between the Donnan potential and surface potential of a cylindrical soft particle (i.e., a polyElectrolyte-coated cylindrical particle) in a symmetrical Electrolyte Solution. Numerical results obtained by the present method are in excellent agreement with exact results obtained by solving the nonlinear cylindrical Poisson-Boltzmann equations both inside and outside the polyElectrolyte layer.
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Donnan potential and surface potential of a spherical soft particle in an Electrolyte Solution.
Journal of colloid and interface science, 2008Co-Authors: Hiroyuki OhshimaAbstract:Abstract A simple numerical method, which does not involve numerical integration of the Poisson–Boltzmann equations, is presented for obtaining the relationship between the Donnan potential and surface potential of a spherical soft particle (i.e., a polyElectrolyte-coated particle) in a symmetrical Electrolyte Solution. We assume that a soft particle consists of the particle core of radius a covered with an ion-penetrable surface layer of polyElectrolytes of thickness d and that ionized groups of valence Z are distributed at a uniform density of N in the polyElectrolyte layer and the relative permittivity takes the same value in the regions outside and inside the polyElectrolyte layer. The Donnan potential and surface potential are determined by the values of a , d , Z , N , and the Debye–Huckel parameter κ of the Electrolyte Solution. Numerical results obtained by the present method are in excellent agreement with exact results obtained by solving the nonlinear spherical Poisson–Boltzmann equations for the both regions inside and outside the polyElectrolyte layer.
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On the limiting electrophoretic mobility of a highly charged colloidal particle in an Electrolyte Solution
Journal of colloid and interface science, 2003Co-Authors: Hiroyuki OhshimaAbstract:Abstract The electrophoretic mobility of a spherical charged colloidal particle in an Electrolyte Solution with large κa (where κ = Debye–Huckel parameter and a = particle radius) tends to a nonzero constant value in the limit of high zeta potential. It is demonstrated that this is caused by the fact that counterions condensed near the highly charged particle surface do not contribute to the electrophoretic mobility and only co-ions govern the mobility. A simple method to derive the limiting electrophoretic mobility expression is given. The present method is also applied to cylindrical particles, showing that the leading term of the limiting electrophoretic mobility of a cylindrical particle in a transverse field with large κa is the same as that of a spherical particle. The electrophoretic mobility of a cylindrical particle in a tangential field, on the other hand, is proportional to the particle zeta potential and does not exhibit a constant limiting value for high zeta potentials.
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double layer potential distribution and surface charge density surface potential relationship for a nearly spherical spheroid in an Electrolyte Solution
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000Co-Authors: Hiroyuki OhshimaAbstract:Abstract A simple approximation method is presented to derive the double layer potential distribution and the surface charge density/surface potential relationship for a nearly spherical spheroidal colloidal particle immersed in an Electrolyte Solution on the basis of the linearized Poisson–Boltzmann equation.
Amer El M A Sayed - One of the best experts on this subject based on the ideXlab platform.
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
Gastrointestinal Endoscopy, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Abstract Background: Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation ( p lt; 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte. (Gastrointest Endosc 2003;58:36-40.)
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
United European Gastroenterology Week, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation (p < 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte.
David Kastenberg - One of the best experts on this subject based on the ideXlab platform.
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the effect on colon visualization during colonoscopy of the addition of simethicone to polyethylene glycol Electrolyte Solution a randomized single blind study
Clinical and translational gastroenterology, 2012Co-Authors: Rebecca Matro, Constantine Daskalakis, Leo Katz, Keegan Tupchong, Victoria Gordon, David KastenbergAbstract:The Effect on Colon Visualization During Colonoscopy of the Addition of Simethicone to Polyethylene Glycol-Electrolyte Solution: A Randomized Single-Blind Study
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efficacy of morning only compared with split dose polyethylene glycol Electrolyte Solution for afternoon colonoscopy a randomized controlled single blind study
The American Journal of Gastroenterology, 2010Co-Authors: Rebecca Matro, Anastasia Shnitser, Maya Spodik, Constantine Daskalakis, Leo Katz, Alexandra Murtha, David KastenbergAbstract:Efficacy of Morning-Only Compared With Split-Dose Polyethylene Glycol Electrolyte Solution for Afternoon Colonoscopy: A Randomized Controlled Single-Blind Study
Fadi H Mourad - One of the best experts on this subject based on the ideXlab platform.
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
Gastrointestinal Endoscopy, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Abstract Background: Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation ( p lt; 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte. (Gastrointest Endosc 2003;58:36-40.)
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a randomized single blind trial of whole versus split dose polyethylene glycol Electrolyte Solution for colonoscopy preparation
United European Gastroenterology Week, 2003Co-Authors: Amer El M A Sayed, Zeina A Kanafani, Fadi H Mourad, Assaad Soweid, Kassem Barada, Clarisse S Adorian, Walid A Nasreddine, Ala I ShararaAbstract:Colonoscopy preparation regimens are often poorly tolerated because they require use of large-volume bowel preparation Solution and diet restrictions for adequate cleansing. This study evaluated the efficacy and tolerability of a split-dose polyethylene glycol-Electrolyte Solution plus bisacodyl and a regular diet. Methods: A total of 187 patients (104 men, 83 women; age range 18-91 years) were randomly assigned to receive either 3 L of polyethylene glycol-Electrolyte Solution (n = 96; Group A) with a liquid diet on the day before colonoscopy, or 2 L of polyethylene glycol-Electrolyte Solution, one tablet of bisacodyl, and a minimally restricted diet on the day before colonoscopy, and then 1 L of the same Solution on the day of colonoscopy (n = 91; Group B). Acceptability, adverse events, and willingness to retake the preparation were assessed by questionnaire. The quality of the preparation was graded by an endoscopist, blinded to the type of preparation, by using a previously described scale (excellent to poor). Results: There were 96 patients in Group A and 91 in Group B. Colon cleansing was significantly better in Group B with regard to the overall quality of the preparation (p < 0.05). Compliance was significantly higher in Group B as evidenced by the lower number of patients who discontinued the preparation (4 vs. 15; p = 0.02) because of side effects such as nausea or vomiting. The degree of discomfort, adverse events, and willingness to retake the preparation were not significantly different between the groups. Conclusions: Colonic preparation with split-dose polyethylene glycol-Electrolyte provided better quality colon cleansing and higher compliance, with less dietary restrictions, than preparation with whole-dose polyethylene glycol-Electrolyte.