Concordancia de valoraciones del dolor entre la Escala de Conductas Indicadoras del Dolor y Behavioral Pain Scale / Concordance of pain assessment between the Escala de Conductas Indicadoras de Dolor y Behavioral Pain Scale

Introducción: La valoración del dolor del paciente critico se basa en indicadores conductuales. Actualmente existen diversas escalas con diferencias en la forma de puntuar la presencia de dolor. Objetivo: Determinar la concordancia entre mediciones del dolor según la Escala de conductas indicadoras de dolor (ESCID) y la Behavioral Pain Scale (BPS). Métodos: Estudio observacional en pacientes con ventilación mecánica. Se aplicaron la BPS y la ESCID en reposo y durante aspiración de secreciones, a fin de determinar su concordancia mediante el coeficiente Kappa de Cohen y el nivel de dolor de la ESCID. Resultados: La concordancia estadística entre la BPS y la ESCID fue 0.23 según el coeficiente Kappa de Cohen, considerada "regular" de acuerdo con Landis y Koch. La BPS determinó presencia de dolor en 93.4% de pacientes durante la aspiración de secreciones, y la ESCID lo detectó en el 100%, clasificando 80% en nivel moderado­grave. Limitaciones de estudio: Muestra de 15 pacientes. El estudio se realizó en dos momentos. Originalidad: El resultado obtenido no tiene comparación con otro estudio, pues sólo se ha estudiado la concordancia entre observadores. Conclusiones: La concordancia entre las mediciones del dolor con ambas escalas se considera baja. La ESCID muestra mayor sensibilidad, aunque los niveles de puntuaciones bajas pueden ser causados por factores no relacionados con dolor. BPS muestra menor sensibilidad, pues considera la presencia de dolor con puntajes sin clasificaciones intermedias. Este estudio apoya el uso de ESCID como una escala confiable en las valoraciones del dolor.

Introduction: Pain assessment in critical patients is based on behavioral indicators. Currently, there are various scales that differ in their pain-scoring systems. Objective: To determine the concordance between pain measurements according the Behavioural Indicators of Pain Scale (ESCID, by its acronym in Spanish) and Behavioral Pain Scale (BPS). Methods: Observational study in patients subjected to mechanical ventilation. The BPS and the ESCID were applied at rest and during aspiration of secretions, in order to determine their concordance using Cohen's kappa coefficient and pain level according to ESCID. Results: The statistical concordance between the BPS and ESCID was 0.23 according to Cohen's kappa coefficient, considered "regular" as stated by Landis and Koch. BPS determined the presence of pain in 93.4% of patients during aspiration of secretions, and ESCID detected it in 100% of patients, with 80% in the moderate-severe level. Study limitations: Sample of 15 patients. The study was performed two times. Originality: The obtained results have no comparison with other studies, since they only analyze inter-observer concordance. Conclusions: The concordance between pain measurements with both scales is considered low. ESCID shows higher pain sensitivity, although low score levels may be caused by factors not related to pain. BPS shows lower sensitivity, since it considers the presence of pain with scores without intermediate classifications. This study supports the use of ESCID as a reliable scale for pain assessment

Prostaglandin E1 attenuation of ischemic renal reperfusion injury in the rat.

BACKGROUND: Prostaglandin E1 (PGE1), a vasodilating prostaglandin, has been shown to protect against renal ischemic-reperfusion injury in acute experiments. The purpose of this study was to determine whether or not delayed administration of PGE1 would also be effective, as it has been suggested to be, in ischemic hepatic injury. STUDY DESIGN: In a chronic model, rats underwent 60 minutes of total renal ischemia followed by either NaCl or PGE1 therapy delivered at either time 0, 30, or 60 minutes after reperfusion. Serum creatinine and renal histology were evaluated for seven days. In an isolated perfused kidney model, kidneys were similarly treated but were removed and perfused in order to measure renal vascular resistance (VR). RESULTS: Prostaglandin E1 administration at time 0 resulted in lower creatinine values when compared with controls at both day 2 (2.1 +/- 0.4 compared with 4.2 +/- 0.9 mg/dL) and day 7 (0.9 +/- 0.1 compared with 2.3 +/- 0.8 mg/dL). Conversely, no improvement was observed when PGE1 was delayed for either 30 or 60 minutes. Renal morphology at seven days was essentially intact in PGE1-treated rats (time 0) whereas changes characteristic of acute tubular necrosis were observed in control kidneys. Ischemia caused a twofold increase in VR compared with nonischemic controls (6.18 +/- 1.12 compared with 3.45 +/- 0.66 mm Hg/mL/min/g at 20 minutes of perfusion). Prostaglandin E1-treated kidneys (time 0) had a VR that was unchanged from that calculated for nonischemic controls (3.28 +/- 0.63 compared with 3.45 +/- 0.66 mm Hg/mL/min/g at 20 minutes). CONCLUSIONS: These data demonstrate that after total renal ischemia, PGE1 administration at reperfusion ameliorates the expected injury, whereas delayed treatment is ineffective. Decreased vascular resistance may be responsible for this protective effect.

Captopril amelioration of renal reperfusion injury.

The purpose of this study was to determine whether angiotensin converting enzyme inhibition could ameliorate renal ischemic injury. Both a chronic rat model and a rat isolated perfused kidney (IPK) model were used. Adult rats were subjected to 60 min of left hilar crossclamping and right nephrectomy. Captopril (1 mg/kg) was given intravenously 5-10 min prior to clamping (CAP-pre, n = 5), at reperfusion (CAP-post, n = 5), or 30 min after reperfusion (CAP-30 min post, n = 5). Other groups of rats received enalapril (0.8 mg/kg iv) in the same manner (ENAL-pre, n = 5; ENAL-post, n = 5; ENAL-30 min post, n = 4). Serum creatinine in the treated groups was compared to ischemic control (NS, n = 7) for 7 days. In the IPK experiments, kidneys were similarly treated with CAP or ENAL. Vascular resistance (VR) and oxygen consumption (O2 CON) were determined from pressure, flow, and oxygen tension data for 60 min after initial equilibration. In the chronic model, Day 2 serum creatinine was significantly lower in all treated groups vs ischemic control. By Day 7, serum creatinine remained significantly lower in all ENAL-treated groups and in the CAP-30 min post group, although other CAP-treated groups had appreciably, although not significantly, lower creatinines, too. Histologic examination of CAP-pre kidney revealed intact morphology compared to ischemic control where acute tubular necrosis was observed. In the IPK experiments, CAP- and ENAL-treated kidneys had VR values that were significantly lower than those of ischemic controls.(ABSTRACT TRUNCATED AT 250 WORDS)