ABSTRACT
BACKGROUND AND AIMS: Severe sepsis is a significant cause of morbidity and mortality following major surgery. The Charlson co-morbidity score (CCS) has been shown to be associated with severe sepsis following major surgery for cancer. This prospective observational study investigated the effect of patient factors (CCS, gender, age and malignancy) and intraoperative factors (duration of surgery and allogeneic blood transfusion) on the incidence of sepsis after elective major surgery, and the impact of patient co-morbidities on length of stay in critical care. MATERIALS AND METHODS: We prospectively identified a cohort of 101 patients undergoing elective major surgery in a university teaching hospital. The CCS was calculated before surgery, and the incidence of sepsis was documented following surgery. We investigated whether age, malignancy, intraoperative allogeneic blood transfusion, length of surgery or gender were associated with sepsis following surgery. RESULTS: Twenty-seven (27%) patients developed sepsis. Using multivariate logistic regression, the duration of surgery was associated with the development of sepsis after surgery (P = 0.054, odds ratio 1.2). The CCS was not associated with sepsis in this population of cancer and non-cancer patients undergoing elective major surgery, but was associated with longer length of stay in the intensive care unit (P = 0.016). CONCLUSIONS: Duration of surgery, but not patient co-morbidity as assessed by the CCS, may predict the postoperative incidence of sepsis. CCS could be used as a guide to predict consumption of critical care resources by elective surgical patients. A higher CCS was associated with a longer ICU stay. Resources, such as postoperative goal directed therapy, may be useful in reducing length of stay, hospital costs and risks of infective complications in this subgroup of patients with higher CCS.
ABSTRACT
BACKGROUND: This is a pilot study to investigate the effects of electrostimulation of acupuncture points on sedation and the dose of sedatives in the Intensive Care Unit. METHODS: Electrostimulation of acupuncture points was performed on 12 critically ill patients requiring sedation for mechanical ventilation. Electrostimulation was applied by point surface electrodes at LI4, ST36, HT7 and LR3 points for 20 minutes every hour for 12 hours using dense dispersed mode with a current frequency of 10-100 Hz and maximum intensity of 10 mA. All patients were sedated with propofol and alfentanil as required. The dose of propofol was reduced by 10mg/hour provided the patient remained sedated according to our guidelines. Sedation and analgesia scores, dose of sedative and analgesics drugs, respiratory rate, heart rate, mean arterial blood pressure and compliance with the ventilator were recorded before electrostimulation of acupuncture points, and hourly thereafter for 12 hours. RESULTS: There was significant reduction in the median propofol consumption from 145 mg/hour (range 30-250) to 15 mg/hour (range 0-250) (P<0.05), without any significant change in sedation scores or analgesia scores. The haemodynamic and respiratory variables remained stable. All patients were compliant with the ventilator. CONCLUSIONS: This pilot study showed significant reduction in the dose of propofol required for sedation in critically ill patients following surface electrostimulation of acupuncture points, without any adverse effects. A randomised controlled trial is warranted.
