Abstract:
:Doppler-duplex has been widely used to quantify blood flow. Nevertheless, its usefulness in assessing portal vein flow (PVF) has been questioned due to technical problems: vessel cross sectional area measurements, interobserver variability, and PVF changes related to physiological events. This study was aimed to measure PVF in patients with cirrhosis and portal hypertension, to estimate changes in PVF during the respiratory cycle, and to evaluate intraobserver variability of Doppler-duplex technique. Twenty-two patients with liver cirrhosis and portal hypertension and 22 healthy subjects were included. One operator made 6 measurements of portal vein diameter (D) and mean flow velocity in inspiration and aspiration. Area of the vessel (A) and PVF were calculated by a microprocessor. Interobserver variability was estimated for each subject and a mean was determined for each group. In the control group, PVF was 901 +/- 39 ml/min in inspiration and 633 +/- 38 ml/min in aspiration; p < 0.001. In patients with cirrhosis PVF was 1303 +/- 121 ml/min in inspiration and 1003 +/- 96 ml/min in aspiration; p < 0.001. Intraobserver variability was 6.0 +/- 0.6% for D, 12.0 +/- 3% for MV and 18.3 +/- 1.6% for PVF in healthy subjects and 5.3 +/- 0.7% for D, 9.2 +/- 0.9% for MV and 15.2 +/- 1.5% for PVF in patients with cirrhosis and portal hypertension. In conclusion, PVF is significantly increased in cirrhotics. PVF was higher in inspiration than espiration in both groups. The Doppler-duplex method evaluation of PVF has an important intraobserver variability (18.3 +/- 1.6%). Then, changes in PVF less than 20% are not accurately measured by this technique.
journal_name
Rev Med Chiljournal_title
Revista medica de Chileauthors
Fernández M,Chesta J,Jirón MI,Mánquez P,Brahm Jsubject
Has Abstractpub_date
1991-05-01 00:00:00pages
524-9issue
5eissn
0034-9887issn
0717-6163journal_volume
119pub_type
杂志文章abstract::Celiac disease (CD), with a 1% worldwide prevalence, is an enteropathy caused by an autoimmune reaction to gluten in genetically susceptible individuals, which codify for histocompatibility molecules HLA DQ-2/DQ-8. From the anatomical point of view, CD is characterized by intestinal villous atrophy, crypt hyperplasia,...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:/S0034-98872009001200012
更新日期:2009-12-01 00:00:00
abstract::Physicians took part in the promotion of public policies that regulated urban and architectural work, before engineers, architects, planners, and even before the State had a chance to take part in the formulation of such policies. Starting in the late nineteenth century, and especially during the first decade of the t...
journal_title:Revista medica de Chile
pub_type: 历史文章,杂志文章
doi:10.4067/S0034-98872016000100015
更新日期:2016-01-01 00:00:00
abstract:UNLABELLED:Circulating concentrations of the high affinity growth hormone binding protein (GHBP) may be a marker of GH receptor density as well as GH sensitivity. GOAL:To determine values of GHBP for a normal Chilean pediatric population. METHODS:We determined GHBP levels in 73 males and 73 females between 4 to 15.5 ...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2001-04-01 00:00:00
abstract:BACKGROUND:Central nervous system damage associated to HTLV-I does not limit itself to the spinal cord, but also involves subcortical structures, producing cognitive impairment and behavioral changes which eventually could conform a new form of subcortical dementia. AIM:To study cognitive changes in patients with HTLV...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00
abstract:AIM:To measure the impact of day care attendance on lower respiratory tract infections in children under two years old in two urban settings with different degrees of air pollution. SUBJECTS AND METHODS:A 26 week follow up, during fall and winter of 1991 and 1992, was performed to 98 children (48 attending day care an...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1994-07-01 00:00:00
abstract::Two atypical cases of parvovirus B19 infection occurred consecutively within a family. A 14 year-old patient presented an extended papular-purpuric "gloves and socks" syndrome and two weeks later his mother developed a predominantly unilateral purpuric rash in the limbs with severe malaise. Specific IgM antibodies in ...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872008000500011
更新日期:2008-05-01 00:00:00
abstract::Between January 1986 and December 1990 the prevalence of F. hepatica infection was studied in 5861 rural inhabitants of the provinces of Curico, Talca and Linares, VII Region, an hyperendemic zone of animal fascioliasis. Every one was screened by intradermal (IDR), complement fixation (CF), double diffusion (DD) count...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1992-06-01 00:00:00
abstract:BACKGROUND:Mental disorders may interfere, aggravate or mimic medical conditions. AIM:To study the prevalence of psychiatric disorders among patients hospitalized in a medical ward of a general hospital. PATIENTS AND METHODS:A structured interview for DSM-III, devised for "non patients", was applied to 203 men and 20...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2001-11-01 00:00:00
abstract::We analyze the effect of inspiratory muscle training (IMT) in patients with chronic obstructive pulmonary disease (COPD), with special emphasis on its effects on inspiratory muscle function and clinical outcomes. We reviewed only randomized, controlled studies that have either controlled both the load and the breathin...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:
更新日期:1998-05-01 00:00:00
abstract::Microalbuminuria is a new tool in the management of patients with diabetes mellitus or hypertension. Microalbuminuria is an easily measured biomarker in a urine sample. Urinary albumin to creatinine ratio in first morning urine sample correlates with 24 hours urinary albumin excretion, but it is easier to obtain, and ...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/S0034-98872012000600016
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:The dual potential to promote tolerance or inflammation when facing self-antigens makes dendritic cells (DCs) fundamental players in autoimmunity. There is an association between smoking and DCs maturation in patients with rheumatoid arthritis (RA). However, ethnicity is a key factor in autoimmune disorders....
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872018000200150
更新日期:2018-02-01 00:00:00
abstract::Background Patients discharged from general hospitals with a potentially disabling condition can benefit in their recovery with the aid of physical medicine and rehabilitation services. Aim To determine the proportion of patients discharged from a general hospital with a potentially disabling condition, who were deriv...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872017001201541
更新日期:2017-12-01 00:00:00
abstract::Addisonian crisis as a first manifestation of metastatic disease secondary to cancer is uncommon. We report a 63-year-old man with a history of one year of fatigue, weakness, weight loss and repeated symptomatic hypoglycemia. The cortisol stimulation test with ACTH confirmed primary adrenal insufficiency. While receiv...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872011000900013
更新日期:2011-09-01 00:00:00
abstract::Gallbladder carcinoma is frequent in Chile. The aim of this study was to report the mutagenicity of whole human bile, using the Ames/Salmonella microsome assay with Salmonella typhimurium TA98. The bile of 19 patients, aged 23 to 64 years old, subjected to cholecystectomy was examined, and mutagen activity was found i...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract::Noncardiogenic pulmonary edema is a well recognized complication of upper airway obstruction. We report the case of a previously healthy 18-year-old male who presented this complication following laryngospasm after anesthesia. He developed severe pulmonary edema with hypoxemia, high cardiac output and low pulmonary ca...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1992-12-01 00:00:00
abstract::An alternative strategy for cancer treatment is the manipulation of the immune system, denominated cancer immunotherapy. The immunotherapeutical use of cells of the immune system, like dendritic cells (DC), is being explored in different clinical protocols. Recently, we finalized a clinical phase I protocol, for the t...
journal_title:Revista medica de Chile
pub_type: 临床试验,杂志文章,评审
doi:
更新日期:2004-09-01 00:00:00
abstract:BACKGROUND:Vildagliptin is a dipeptidyl peptidase IV inhibitor (DPP4i). Its efficacy and safety of DPP4i in Chilean real life type 2 diabetic (T2D) patients is not well known. AIM:To assess the safety profile and effectiveness of 12 weeks of treatment with Vildagliptin for glycemic control in T2D Chilean patients with...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872015000100008
更新日期:2015-01-01 00:00:00
abstract::Quality has a central role in medical care. The satisfaction of the rights of people to medical care, presupposes good quality medical acts. The meaning of quality goes further than a good attention based on scientific evidence and with competent skills. It comprises patient-physician relationship where professional b...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2000-12-01 00:00:00
abstract::IgG4 disease is a multi-systemic condition involving pancreas, salivary glands and lymph nodes. Less frequently, it causes interstitial nephritis and involves the lungs. We report a 58 years old male with a four years history of hemoptysis and renal dysfunction characterized by hematuria and proteinuria, responsive to...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872017000100018
更新日期:2017-01-01 00:00:00
abstract::This article analyzes important changes in medical practice, focusing in those most deeply perceived by a group of physiciansfrom the Metropolitan Region of Santiago, included in a joint research conducted by the Departments of Psychiatry and Mental Health (East) of the Medical Faculty at the University of Chile and P...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872004000600015
更新日期:2004-06-01 00:00:00
abstract::An increased life expectancy is associated to a nation's progress. Life expectancy at birth is 78 years in developed countries, 72 in Latin America, 70 in China, 63 in Eastern Europe and 51 in Africa. Chile is the Latin American country with the higher increment in life expectancy, reaching 75 years at birth, during t...
journal_title:Revista medica de Chile
pub_type: 社论
doi:
更新日期:1999-06-01 00:00:00
abstract:BACKGROUND:There is a paucity of good quality research about the diagnosis of esophageal varices and the prophylaxis and treatment of variceal bleeding in pediatric patients with portal hypertension There is little consensus and practically no evidence-based approach about the management of these patients. AIM:To desc...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872016000700008
更新日期:2016-07-01 00:00:00
abstract::The echocardiographic identification of cardiac tumors as cause of embolic episodes is infrequent, and the finding of multiple papillary fibroelastoma is even less common. We report a 70 years old female with a history of a rheumatic mitral valve lesion, subjected to a commissurotomy in 1970. She was admitted with a c...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2001-09-01 00:00:00
abstract::To be successful, modern medical acts require the participation of several professionals and assistants and, as such, there has been a steady trend from individual medicine to the collective practice of the profession. This format raises issues in determining when a medical professional or other practitioner is liable...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872011000500016
更新日期:2011-05-01 00:00:00
abstract::One of the most important topics mentioned by people from places affected by the February 27th, 2010 earthquake to the Presidential Delegation for the Reconstruction, was the urgent need of mental health care. Given the enormous individual and social burden of mental health sequelae after disasters, its treatment beco...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872016000200014
更新日期:2016-02-01 00:00:00
abstract::A narrative review of the evidence regarding the role of inflammation in the pathophysiology of coronary heart disease and depression is presented. As a common pathogenic factor, inflammation could explain the frequent association of both diseases. We discuss the benefit of exercise and diet modifications in both cond...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/s0034-98872020000200224
更新日期:2020-02-01 00:00:00
abstract:BACKGROUND:The differential diagnosis of pancreatic cancer and focal forms of autoimmune pancreatitis is complicated since serological tests, IgG4 and CA 19-9 have a low sensibility and specificity. CT scan and magnetic resonance imaging provide clear differentiation in the majority, but not in all cases. Endosonograph...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872014000400001
更新日期:2014-04-01 00:00:00
abstract::A lateral abdominal bruit is considered an important finding for the detection of renovascular hypertension. However, the precision and accuracy of new techniques such as angiography, Doppler ultrasound and studies with radioisotopes have changed its value and clinical interpretation. We report a 75 years old woman wi...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1997-11-01 00:00:00
abstract:BACKGROUND:The current recommendations for treatment of patients with newly diagnosed acute promyelocytic leukemia (APL) include all-trans-retinoic acid (ATRA) and anthracycline based chemotherapy. AIM:To evaluate the results of the Chilean protocol following the LPA99 regimen of the Spanish PETHEMA group, except for ...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872013001000001
更新日期:2013-10-01 00:00:00
abstract::A revolution is taking place in Medicine as a consequence of advances in biotechnology and informatics. The unraveling of the human genome with a description of chromosomal maps for all structural genes affords a new framework for the understanding of etiology, diagnosis and prevention of every disease. More than thre...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:
更新日期:1989-05-01 00:00:00