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1.
Dig Dis Sci ; 2024 May 29.
Artículo en Inglés | MEDLINE | ID: mdl-38811506

RESUMEN

INTRODUCTION: Alcoholic hepatitis (AH) is a serious complication of alcohol consumption with high morbidity and mortality, particularly in the United States where alcohol-related liver diseases rank as one of the leading causes of preventable death. Our study aims to analyze the morbidity and mortality of AH across racial groups and project hospitalization trends up to 2028, thereby informing public health initiatives. METHODS: We conducted a cross-sectional study utilizing data from the Nationwide Inpatient Sample (NIS) spanning 2012 to 2021. The study population comprised hospitalizations identified using specific ICD-9-CM and ICD-10-CM codes for AH. We assessed hospitalizations, in-hospital mortality rates, length of stay (LOS), and morbidities related to alcoholic hepatitis adjusting for sociodemographic factors and hospital characteristics. Statistical analyses were performed using Stata and R software, employing logistic and linear regression analyses, and SARIMA models for forecasting. RESULTS: Our results indicated a predominantly White cohort (68%), with a notable increase in AH hospitalizations among Hispanics (129.1% from 2012 to 2021). Racial disparities were observed in inpatient mortality, liver transplant accessibility, and the occurrence of in-hospital complications. The study forecasts a continued rise in hospitalizations across all racial groups, with Hispanics experiencing the sharpest increase. CONCLUSION: Our study reveals a disproportionate rise in the AH burden among Hispanics with projections indicating a persistent upward trend through 2028. These findings highlight the need for targeted public health strategies and improved healthcare access to mitigate the increasing AH burden and address disparities in care and outcomes.

2.
Int J Colorectal Dis ; 36(4): 701-708, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33063223

RESUMEN

BACKGROUND: Early detection and advancement in therapy have successfully achieved a steady decrease in colorectal cancer (CRC) mortality over the last two decades. On the other hand, studies investigating mortality trends in inflammatory bowel disease-associated CRC (IBD-CRC) are scarce and inconclusive. We conducted a retrospective analysis aiming to identify differences between inpatient mortality trends in IBD-CRC vs non-IBD-CRC and possible contributing factors. METHODS: The National Inpatient Sample (NIS) database from 2006-2014 was queried to identify all patients admitted with a diagnosis of CRC. The main outcome was the prevalence and trend of mortality among IBD-CRC and non-IBD-CRC. The secondary outcome was the evaluation of predictors of inpatient mortality. RESULTS: A total of 1,190,759 weighted cases with the admission diagnosis of CRC were included in the study. Of which 10,997 (0.9%) had a co-diagnosis of IBD. The population with non-IBD-CRC had a statistically significant downward temporal trend in mortality (p < 0.001), while patients with IBD-CRC did not have any statistically significant temporal trend in inpatient mortality (p = 0.067). After subgroup analysis, patients with Crohn's disease-CRC had an upward temporal trend in mortality (p = 0.183) compared to patients with ulcerative colitis-CRC with a downward trend in mortality (p = 0.001). Sepsis resulted to be a stronger predictor of mortality for CD-CRC, while VTE for UC-CRC. CONCLUSION: Multiples strategies established to prevent morbidity and mortality in CRC have been fruitful in non-IBD-CRC population, but have not been enough for IBD-CRC population to cause the same effect. Further strategies are needed to achieve a reduction in IBD-CRC mortality trend.


Asunto(s)
Colitis Ulcerosa , Neoplasias Colorrectales , Enfermedades Inflamatorias del Intestino , Humanos , Enfermedades Inflamatorias del Intestino/complicaciones , Pacientes Internos , Estudios Retrospectivos , Factores de Riesgo
3.
Dig Dis Sci ; 66(6): 2084-2091, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-32648078

RESUMEN

BACKGROUND AND AIMS: Several criteria have been described to noninvasively predict the presence of high-risk esophageal varices in patients with compensated advanced chronic liver disease (cACLD). However, a recent study showed that treatment with ß blockers could increase decompensation-free survival in patients with clinically significant portal hypertension, thereby making it important to predict the presence of any esophageal varices. We aimed to develop a simple scoring system to predict any esophageal varices. METHODS: We retrospectively reviewed patients who had vibration-controlled transient elastography (VCTE) at Cook County Hospital, Chicago, USA. Patients with cACLD and liver stiffness measurement (LSM) ≥ 10 kPa with esophagogastroduodenoscopy performed within one year of VCTE were analyzed. We generated a novel score to predict esophageal varices, using the beta coefficient of predictive variables. The score was validated in an external cohort at the University of Iowa Hospital, USA. RESULTS: There were 372 patients in the development cohort and 200 patients in the validation cohort. LSM, platelet count, and albumin were identified as predictors of esophageal varices and were included for generating the Cook County score as "platelet count * - 0.0155872 + VCTE score * 0.0387052 + albumin * - 0.8549209." The area under receiver operating curve for our score was 0.86 for any varices and 0.85 for high risk varices and avoided more endoscopies than the expanded Baveno VI criteria while maintaining a very low miss rate (negative predictive value > 99%). CONCLUSION: We propose a new, highly accurate, and easy-to-use scoring system to predict the presence of not only high-risk but any esophageal varices in patients with cACLD.


Asunto(s)
Diagnóstico por Imagen de Elasticidad/métodos , Enfermedad Hepática en Estado Terminal/diagnóstico por imagen , Várices Esofágicas y Gástricas/diagnóstico por imagen , Anciano , Diagnóstico por Imagen de Elasticidad/normas , Enfermedad Hepática en Estado Terminal/fisiopatología , Várices Esofágicas y Gástricas/fisiopatología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Estudios Retrospectivos
4.
Dig Dis Sci ; 64(10): 2939-2944, 2019 10.
Artículo en Inglés | MEDLINE | ID: mdl-30825109

RESUMEN

BACKGROUND: Crohn's disease is an idiopathic inflammatory process that is occasionally associated with complications, which cause significant morbidity and mortality. The anti-inflammatory effect of cannabis in intestinal inflammation has been shown in several experimental models; it is unknown whether this correlates with fewer complications in Crohn's disease patients. AIMS: To compare the prevalence of Crohn's disease-related complications among cannabis users and non-users in patients admitted with a primary diagnosis of Crohn's disease or a primary diagnosis of Crohn's related complication and a secondary diagnosis of Crohn's disease between 2012 and 2014. METHODS: We used data from the Healthcare Cost and Utilization Project-National Inpatient Sample. Cannabis users (615) were compared directly after propensity score match to non-users, in aspects of various complications and clinical end-points. RESULTS: Among matched cohorts, Cannabis users were less likely to have the following: active fistulizing disease and intra-abdominal abscess (11.5% vs. 15.9%; aOR 0.68 [0.49 to 0.94], p = 0.025), blood product transfusion (5.0% vs. 8.0%; aOR 0.48 [0.30 to 0.79], p = 0.037), colectomy (3.7% vs. 7.5%; aOR 0.48 [0.29-0.80], p = 0.004), and parenteral nutrition requirement (3.4% vs. 6.7%, aOR 0.39 [0.23 to 0.68], p = 0.009). CONCLUSION: Cannabis use may mitigate several of the well-described complications of Crohn's disease among hospital inpatients. These effects could possibly be through the effect of cannabis in the endocannabinoid system.


Asunto(s)
Absceso Abdominal , Transfusión Sanguínea/estadística & datos numéricos , Colectomía/estadística & datos numéricos , Enfermedad de Crohn/complicaciones , Fístula Intestinal , Abuso de Marihuana/epidemiología , Nutrición Parenteral/estadística & datos numéricos , Absceso Abdominal/epidemiología , Absceso Abdominal/etiología , Adulto , Transfusión Sanguínea/métodos , Colectomía/métodos , Correlación de Datos , Enfermedad de Crohn/diagnóstico , Enfermedad de Crohn/epidemiología , Enfermedad de Crohn/terapia , Femenino , Humanos , Fístula Intestinal/epidemiología , Fístula Intestinal/etiología , Masculino , Persona de Mediana Edad , Nutrición Parenteral/métodos , Prevalencia , Puntaje de Propensión , Estudios Retrospectivos , Estados Unidos/epidemiología
7.
J Gen Intern Med ; 30(8): 1112-7, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25701049

RESUMEN

BACKGROUND: Thrombocytopenia has been shown to be the single most useful laboratory investigation for identifying subclinical cirrhosis of varying etiologies. However, alcohol per se can result in thrombocytopenia, and hence it is unclear whether platelet count can identify cirrhosis in patients who are alcoholic. OBJECTIVES: To characterize the utility of clinical predictors, especially platelet count, for identifying the presence of cirrhosis in alcoholics. To develop a simple, objective model for identifying cirrhosis in alcoholics. DESIGN: Retrospective cohort study. PARTICIPANTS: A total of 2,471 consecutive hospitalized patients with abnormal liver enzyme levels were screened, from which 272 patients with a history of recent and ongoing alcohol intake, negative diagnostic studies for alternative etiologies of chronic liver disease, and recent liver imaging with ultrasound or CT scan were included. MAIN MEASURES: Results of liver imaging and admission laboratory studies including liver enzymes, coagulation studies, and blood counts. KEY RESULTS: One hundred twenty-nine patients (47%) had cirrhosis based on imaging; 143 patients (53%) had no cirrhosis. A pre-sobriety platelet count (during ongoing alcohol intake) of less than 70*10(3) cells/mm(3) was effective for ruling in cirrhosis (positive likelihood ratio [LR] 6.8, 95% CI: 3.4, 14); platelet count greater than 200*10(3) was useful for ruling out cirrhosis in alcoholics (negative LR 0.18, 95% CI: 0.10, 0.35). Multivariate logistic regression analysis identified international normalized ratio (INR) (p < 0.01) and pre-sobriety platelet count (p < 0.01) as independent predictors of cirrhosis. A Model for identifying Cirrhosis in Alcoholic Liver Disease (MCALD) was developed using the INR and pre-sobriety platelet count; it had an area under the receiver operating characteristic curve of 0.89 and Hosmer-Lemeshow goodness of fit chi(2) (p value) of 8.9 (0.35) for predicting cirrhosis in alcoholics. A MCALD score > 5.5 corresponded to an increased likelihood of cirrhosis (LR: 6.5, 95% CI: 4.3, 11.0) and a MCALD score < 5.5 corresponded to decreased likelihood of cirrhosis in alcoholics (LR: 0.25, 95% CI: 0.19, 0.36). Sobriety platelet count (after alcohol abstinence) at a cutoff of 160*10(3) had positive LR of 7.9 (95% CI: 4.4, 14) and negative LR of 0.42 (95% CI: 0.34, 0.52) for predicting cirrhosis in alcoholics. CONCLUSIONS: A simple model of platelet count and INR has good diagnostic accuracy for identifying cirrhosis in alcoholics.


Asunto(s)
Cirrosis Hepática Alcohólica/sangre , Cirrosis Hepática Alcohólica/diagnóstico , Recuento de Plaquetas , Femenino , Humanos , Relación Normalizada Internacional , Hígado/enzimología , Cirrosis Hepática Alcohólica/epidemiología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Trombocitopenia/fisiopatología , Estados Unidos/epidemiología
9.
J Clin Gastroenterol ; 48(5): 414-8, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24406474

RESUMEN

GOALS: To compare the efficacy and tolerability of morning-only polyethylene glycol (PEG) with split-dose preparation in hospitalized patients scheduled for colonoscopy. BACKGROUND: Morning-only colonoscopy preparation may improve efficiency by allowing patient preparation and colonoscopy to be performed on the same day. There are limited data comparing morning-only with split-dose preparation, and more studies are needed before morning-only preparation can be routinely recommended. STUDY: A single-center, prospective, endoscopist-blinded study was conducted, in which hospitalized patients scheduled to undergo diagnostic colonoscopy were randomly assigned to receive 4 L of PEG either on the morning of colonoscopy or as a split-dose (evening-morning). The primary endpoint was efficacy of bowel preparation measured by the Ottawa scale. Secondary endpoints were patient compliance and tolerance. RESULTS: A total of 120 hospitalized patients scheduled for diagnostic colonoscopy were randomized. The mean total Ottawa score was slightly superior for the morning-only arm, and the upper bound of 95% confidence interval (CI) for difference between arms was less than our prespecified noninferiority margin of 1.5 (difference=-0.23; 95% CI, -1.72 to 1.25). The percentage of patients with good bowel preparation was similar for all colonic segments. There was a trend toward more side effects among patients in the morning-only compared with the split-dose arm (71% vs. 54%; P=0.08). Compared with morning-only preparation, more patients in the split-dose arm were willing to undergo similar preparation for future colonoscopies (71% vs. 89%; P=0.02). CONCLUSIONS: Morning-only PEG is not inferior to split-dose preparation regarding bowel cleansing efficacy for colonoscopy in hospitalized patients. However, split-dose preparation was preferred by patients because of less side effects.


Asunto(s)
Catárticos/administración & dosificación , Colonoscopía/métodos , Prioridad del Paciente , Polietilenglicoles/administración & dosificación , Adulto , Anciano , Catárticos/efectos adversos , Colon , Esquema de Medicación , Femenino , Hospitalización , Humanos , Masculino , Persona de Mediana Edad , Cooperación del Paciente , Polietilenglicoles/efectos adversos , Estudios Prospectivos , Método Simple Ciego
11.
Gastroenterology Res ; 16(3): 149-156, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-37351082

RESUMEN

Background: Post-endoscopic retrograde cholangiopancreatography pancreatitis (PEP) represents the most common serious complication after endoscopic retrograde cholangiopancreatography (ERCP). Rectal non-steroidal anti-inflammatory drugs (NSAIDs) and pancreatic duct stenting (PDS) are the prophylactic interventions with more evidence and efficacy; however, PEP still represents a significant source of morbidity, mortality, and economic burden. Chronic statin use has been proposed as a prophylactic method that could be cheap and relatively safe. However, the evidence is conflicting. We aimed to evaluate the impact of endoscopic and pharmacological interventions including chronic statin and aspirin use, on the development of PEP. Methods: A retrospective cohort study evaluated consecutive patients undergoing ERCP at John H. Stroger, Jr. Hospital of Cook County in Chicago from January 2015 to March 2018. Univariate and multivariate analyses were performed using logistic regression. Results: A total of 681 ERCPs were included in the study. Twelve (1.76%) developed PEP. Univariate, multivariate, and subgroup analyses did not show any association between chronic statin or aspirin use and PEP. PDS and rectal indomethacin were protective in patients undergoing pancreatic duct injection. Pancreatic duct injection, female sex, and younger age were associated with a higher risk. History of papillotomy was associated with lower risk only in the univariate analysis (all P values < 0.05). Conclusion: Chronic use of statins and aspirin appears to add no additional benefit to prevent ERCP pancreatitis. Rectal NSAIDs, and PDS after appropriate patient selection continue to be the main prophylactic measures. The lower incidence at our center compared with the reported data can be explained by the high rates of rectal indomethacin and PDS, the use of noninvasive diagnostic modalities for patient selection, and the expertise of the endoscopists.

12.
Cureus ; 14(3): e22814, 2022 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-35399452

RESUMEN

Gastric outlet obstruction (GOO) is a mechanical obstruction usually located in the gastric pylorus or duodenum. After the introduction of proton pump inhibitors (PPIs) in the late 1980s, most cases of gastric outlet obstruction are now caused by malignancy and peptic ulcer disease rarely leads to obstruction. We present a case of GOO caused by a large clot in the pylorus, preventing visualization of the source of bleeding. As the removal of the obstructing clot was deemed too high risk, the patient was treated with promotility agents that relieved the obstruction and allowed for the identification of the etiology of his upper gastrointestinal bleeding. Bleeding was definitively managed with embolization of the gastroduodenal artery.

13.
World J Gastrointest Endosc ; 13(10): 510-517, 2021 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-34733411

RESUMEN

BACKGROUND: Cocaine is a synthetic alkaloid initially viewed as a useful local anesthetic, but which eventually fell out of favor given its high addiction potential. Its predominantly sympathetic effects raise concern for cardiovascular, respiratory, and central nervous system complications in patients undergoing procedures. Peri-procedural cocaine use, often detected via a positive urine toxicology test, has been mostly addressed in the surgical and obstetrical literature. However, there are no clear guidelines on how to effectively risk stratify patients found to be positive for cocaine in the pre-operative setting, often leading to costly procedure cancellations. Within the field of gastroenterology, there is no current data available regarding safety of performing esophagogastroduodenoscopy (EGD) in patients with recent cocaine use. AIM: To compare the prevalence of EGD related complications between active (≤ 5 d) and remote (> 5 d) users of cocaine. METHODS: In total, 48 patients who underwent an EGD at John H. Stroger, Jr. Hospital of Cook County from October 2016 to October 2018 were found to have a positive urine drug screen for cocaine (23 recent and 25 remote). Descriptive statistics were compiled for patient demographics. Statistical tests used to analyze patient characteristics, procedure details, and preprocedural adverse events included t-test, chi-square, Wilcoxon rank sum, and Fisher exact test. RESULTS: Overall, 20 periprocedural events were recorded with no statistically significant difference in distribution between the two groups (12 active vs 8 remote, P = 0.09). Pre- and post-procedure hemodynamics demonstrated only a statistically, but not clinically significant drop in systolic blood pressure and increase in heart rate in the active user group, as well as drop in diastolic blood pressure and oxygen saturation in the remote group (P < 0.05). There were no significant differences in overall hemodynamics between both groups. CONCLUSION: Our study found no significant difference in the rate of periprocedural adverse events during EGD in patients with recent vs remote use of cocaine. Interestingly, there were significantly more patients (30%) with active use of cocaine that required general anesthesia as compared to remote users (0%).

14.
Cureus ; 12(9): e10509, 2020 Sep 17.
Artículo en Inglés | MEDLINE | ID: mdl-33094050

RESUMEN

Sclerosing encapsulating peritonitis (SEP), which is interchangeably used with the term ''abdominal cocoon syndrome'', is a rare condition characterized by a thick fibrous membrane encasing portions of the intestinal wall leading to recurrent bowel obstructions. To date, literature describing the association between this condition and chronic beta-blocker therapy is scarce. This report adds by detailing a rare presentation of SEP and highlights an understudied yet important association of SEP with chronic beta-blocker therapy.

16.
ACG Case Rep J ; 6(10): e00215, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31832452

RESUMEN

Patients presenting to the hospital with esophageal food bolus impaction often need urgent upper endoscopy. However, patients with trismus and microstomia can pose a real challenge because endoscopic access in these patients can be difficult. We present a unique transoral endoscopic approach for esophageal food bolus disimpaction in a patient with microstomia and trismus resulting from chronic graft-vs-host disease.

17.
Endosc Int Open ; 7(6): E808-E812, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31198844

RESUMEN

Background and study aims Gastroenterologists are at high risk for work-related musculoskeletal injuries. Studies have shown that 37 % to 89 % of endoscopists have work-related musculoskeletal injuries. While all surveys until now have focused on practicing endoscopists, there have been no publications assessing the prevalence of musculoskeletal injuries among gastrointerology fellows, which we sought to investigate. Methods A 22-question survey about ergonomics and work-related musculoskeletal injuries was sent to 114 gastroenterology fellows in different programs across the United States in June 2016, and an additional 103 surveys were distributed at Digestive Disease Week in May 2017. Responses were collected, and data were analyzed. Results A total of 156 surveys were collected. Of these, 74 fellows (47 %) reported a new musculoskeletal injury related to endoscopy. Injuries occurred mostly in the first year of fellowship (85 %, P  < 0.001). The most common sites of injury were the right wrist (53 %), left thumb (42 %), back (27 %), and neck (22 %). Only 26 % those who had endoscopy-related musculoskeletal injuries had received training in ergonomics compared to 45 % of those who did not have injury ( P  = 0.012), and ergonomics training was highly desirable among respondents, particularly among those with previous injuries ( P  = 0.0030) Conclusion Musculoskeletal injuries related to endoscopy are very common among gastroenterology fellows, particularly during the first year of fellowship. While the overall percentage of fellows who received training in ergonomics was low, those who did receive training were less like to report a musculoskeletal injury. There is an urgent need for ergonomics training among Gastroenterology fellows.

18.
Medicine (Baltimore) ; 98(32): e16551, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31393356

RESUMEN

Ulcerative colitis (UC) is a chronic inflammatory process that is occasionally associated with complications that cause significant morbidity and mortality. Studies in experimental animal models have demonstrated a beneficial effect of cannabis on intestinal inflammation. It is however unknown if this corresponds to fewer complications for patients with Ulcerative Colitis.We aimed to compare the prevalence of UC related complications and certain key clinical endpoints among cannabis users and nonusers hospitalized with a primary diagnosis of UC, or primary diagnosis of a UC-related complication with a secondary diagnosis of UC.Using data from the Healthcare Cost and Utilization Project-National Inpatient Sample (NIS) during 2010-2014, a total of 298 cannabis users with UC were compared to a propensity score matched group of nonusers with UC. We evaluated several UC-related complications and clinical endpoints.Within our matched cohort, prevalence of partial or total colectomy was lower in cannabis users compared to nonusers (4.4% vs 9.7%, P = .010) and there was a trend toward a lower prevalence of bowel obstruction (6.4% vs 10.7%, P = .057). Cannabis users had shorter hospital length-of-stay (4.5 vs 5.7 days P < .007) compared to their nonuser counterparts.Cannabis use may mitigate some of the well described complications of UC among hospitalized patients. Our findings need further evaluation, ideally through more rigorous clinical trials.


Asunto(s)
Colitis Ulcerosa/complicaciones , Colitis Ulcerosa/epidemiología , Uso de la Marihuana/epidemiología , Adulto , Factores de Edad , Anciano , Colectomía/estadística & datos numéricos , Colitis Ulcerosa/patología , Colitis Ulcerosa/cirugía , Femenino , Humanos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Puntaje de Propensión , Estudios Retrospectivos , Factores Sexuales , Factores Socioeconómicos
19.
AAPS PharmSciTech ; 8(4): E88, 2007 Oct 19.
Artículo en Inglés | MEDLINE | ID: mdl-18181548

RESUMEN

The purpose of the present study was to develop and characterize an oral controlled release drug delivery system for concomitant administration of diclofenac sodium (DS) and chondroitin sulfate (CS). A hydrophilic matrix-based tablet using different concentrations of hydroxypropylmethylcellulose (HPMC) was developed using wet granulation technique to contain 100 mg of DS and 400 mg of CS. Formulations prepared were evaluated for the release of DS and CS over a period of 9 hours in pH 6.8 phosphate buffer using United States Pharmacopeia (USP) type II dissolution apparatus. Along with usual physical properties, the dynamics of water uptake and erosion degree of tablet were also investigated. The in vitro drug release study revealed that HPMC K100CR at a concentration of 40% of the dosage form weight was able to control the simultaneous release of both DS and CS for 9 hours. The release of DS matched with the marketed CR tablet of DS with similarity factor (f(2)) above 50. Water uptake and erosion study of tablets indicated that swelling followed by erosion could be the mechanism of drug release. The in vitro release data of CS and DS followed Korsmeyer-Peppas and zero-order kinetics, respectively. In conclusion, the in vitro release profile and the mathematical models indicate that release of CS and DS can be effectively controlled from a single tablet using HPMC matrix system.


Asunto(s)
Antiinflamatorios no Esteroideos/química , Sulfatos de Condroitina/química , Diclofenaco/química , Portadores de Fármacos , Metilcelulosa/análogos & derivados , Administración Oral , Antiinflamatorios no Esteroideos/administración & dosificación , Química Farmacéutica , Sulfatos de Condroitina/administración & dosificación , Preparaciones de Acción Retardada , Diclofenaco/administración & dosificación , Combinación de Medicamentos , Composición de Medicamentos , Derivados de la Hipromelosa , Cinética , Metilcelulosa/química , Modelos Químicos , Solubilidad , Tecnología Farmacéutica/métodos , Agua/química
20.
AAPS PharmSciTech ; 8(4): E120, 2007 Dec 28.
Artículo en Inglés | MEDLINE | ID: mdl-18181541

RESUMEN

The purpose of the present study was to explore the passive and electrically assisted transdermal transport of diphenhydramine hydrochloride (DPH) by iontophoresis. For better bioavailability, better patient compliance, and enhanced delivery of DPH, an iontophoretic drug delivery system of a thermosensitive DPH gel was formulated using Lutrol F-127. The study was conducted using silver-silver chloride electrodes across hairless pig skin. The effects of pH, polymer concentration, electrode design, and pulse rate on the DPH permeation were investigated. The relationship between temperature, viscosity, and conductance of DPH was correlated using conductometry. Iontophoretic transport of DPH was found to increase with a decrease in the pH of the medium and an increase in the surface area of the electrode. Viscosity measurements and flux calculations indicated the suitability of the Lutrol gel for transdermal iontophoretic delivery of DPH. Anodal pulsed iontophoresis with disc electrode significantly increased the DPH skin permeation as compared with the passive controls.


Asunto(s)
Antagonistas Colinérgicos/administración & dosificación , Difenhidramina/administración & dosificación , Geles , Iontoforesis , Polietilenos/química , Polipropilenos/química , Absorción Cutánea , Piel/metabolismo , Administración Cutánea , Animales , Química Farmacéutica , Antagonistas Colinérgicos/química , Antagonistas Colinérgicos/metabolismo , Cámaras de Difusión de Cultivos , Difenhidramina/química , Difenhidramina/metabolismo , Composición de Medicamentos , Electrodos , Diseño de Equipo , Estudios de Factibilidad , Concentración de Iones de Hidrógeno , Iontoforesis/instrumentación , Iontoforesis/métodos , Permeabilidad , Porcinos , Tecnología Farmacéutica/métodos , Temperatura , Factores de Tiempo , Viscosidad
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