title: [Concordance between central venous and arterial blood gases in post-surgical myocardial revascularization patients in stable condition].
abstract: OBJECTIVE
  The concordance between the parameters of arterial and central venous blood gases has not been defined yet. We studied the concordance between both parameters in post-surgical myocardial revascularization patients in stable condition.
  
  
  METHODS
  Consecutive subjects were studied in a cross-sectional design. The position of the central venous catheter was performed and simultaneously we obtained arterial and central venous blood samples prior to discharge from the intensive care unit. Data are expressed according to Bland-Altman statistical method and the intraclass correlation coefficient. Statistical result was accepted at P<.05.
  
  
  RESULTS
  Two hundred and six samples were studied of 103 post-surgical patients, pH and lactate had a mean difference (limits of agreement) 0.029±0.048 (-0018, 0.077) and -0.12±0.22 (-0.57, 0.33) respectively. The magnitude of the intraclass correlation coefficient was 0.904 and 0.943 respectively. The values related to oxygen pressure were 27.86±6.08 (15.9, 39.8) and oxygen saturation 33.02±6.13 (21, 45), with magnitude of 0.258 and 0.418 respectively.
  
  
  CONCLUSIONS
  The best matching parameters between arterial and central venous blood samples were pH and lactate.
authors.affiliation: Departamento de Hipertensión Pulmonar y Función Ventricular Derecha, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México; Cuidados Intensivos Posquirúrgicos Cardiovasculares, Instituto Nacional de Cardiología Ignacio Chávez, Secretaría de Salud, México DF, México. Electronic address: luis.santosma@imss.gob.mx.
authors.forename: Luis Efren
authors.initials: LE
authors.lastname: Santos-Martínez
authors.affiliation: Cuidados Intensivos Posquirúrgicos Cardiovasculares, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Marlene
authors.initials: M
authors.lastname: Guevara-Carrasco
authors.affiliation: Cuidados Intensivos Posquirúrgicos Cardiovasculares, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Naranjo-Ricoy
authors.affiliation: Cuidados Intensivos Posquirúrgicos Cardiovasculares, Instituto Nacional de Cardiología Ignacio Chávez, Secretaría de Salud, México DF, México.
authors.forename: Francisco Martín
authors.initials: FM
authors.lastname: Baranda-Tovar
authors.affiliation: Cuidados Intensivos Posquirúrgicos Cardiovasculares, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Luis Antonio
authors.initials: LA
authors.lastname: Moreno-Ruíz
authors.affiliation: Cuidados Intensivos Posquirúrgicos Cardiovasculares, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Herrera-Velázquez
authors.affiliation: Dirección de Educación e Investigación en Salud, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI. Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: José Antonio
authors.initials: JA
authors.lastname: Magaña-Serrano
authors.affiliation: Dirección de Educación e Investigación en Salud, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI. Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Jesús Salvador
authors.initials: JS
authors.lastname: Valencia-Sánchez
authors.affiliation: Dirección General, Unidad Médica de Alta Especialidad, Hospital de Cardiología, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, México DF, México.
authors.forename: Moisés Cutiel
authors.initials: MC
authors.lastname: Calderón-Abbo
mesh_terms: D001158:Arteries; D001784:Blood Gas Analysis; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D008875:Middle Aged; D009204:Myocardial Revascularization; D011182:Postoperative Care; D014680:Veins
keywords: Acuerdo; Agreement; Cardiac surgery; Cirugía cardiaca; Confiabilidad; Confiability; Fiabilidad; Fiability; Mexico; México; Repetibilidad; Repetibility