RESUMEN
BACKGROUND: Like any other medical treatment, The intensive care unit (ICU) is a limited resource that needs to be utilized appropriately. This study aimed to identify the outcomes of patients admitted to the ICU based on patient demographic and severity score parameters. METHODS: An observational retrospective cohort study of 1059 patients undergoing laparotomy who were admitted to the ICU was performed. Cases were sub-classified by the mode of admission and risk prediction scores and analyzed outcomes of mortality, ICU length of stay (LOS), and hospital LOS. RESULTS: The mean age of patients who did not survive was older than those who survived, and higher Acute Physiology and Chronic Health Evaluation (APACHE) II and Intensive Care National Audit and Research Centre Physiology Score (ICNARC) observed in patients who died. Emergency admission was also an indicator of increased mortality. Survivors APACHE II scores were the same if they were elective or emergency admissions, although Survivors ICNARC scores were higher in emergency than in elective admissions. Patients who did not survive had a longer ICU LOS stay than those who survived, whereas elective survivors had shorter ICU LOS than the emergency survivors. Regardless of this hospital LOS was the same for both elective and emergency survivors. CONCLUSION: The most unwell patients had the highest risk prediction scores, were more often admitted in the emergency setting, required longer stays in ICU, and had less favorable outcomes. However, ICU did appear to expedite the hospital discharges of emergency patients to match their elective counterparts. Decisions around when and to which patients ICU is an appropriate intervention remains a difficult decision and one that cannot be made without full consideration of all aspects of patient factors.
RESUMEN
BACKGROUND: Why do limb tourniquets cause pain? If ischemia is the mechanism, can supplemental oxygen reduce pain? The Reducing Tourniquet Associated Pain study investigated whether this simple treatment could extend tourniquet tolerance time to facilitate hand surgery under local or regional anesthesia. METHODS: The Reducing Tourniquet Associated Pain study was a double-blind, randomized, controlled trial of healthy volunteers. Participants received either 50% inhaled oxygen or air placebo via a face mask for 3 minutes before and up to 30 minutes after upper arm tourniquet inflation to 250 mmHg. Pain scores were recorded at 2-minute intervals using a validated 100-mm visual analogue scale. The primary outcomes were (1) difference in visual analogue scale score and (2) difference in time taken to reach visual analogue score of 40 mm or more in oxygen and air groups. RESULTS: Fifty participants enrolled and, after exclusion criteria were applied, 46 were analyzed (oxygen, n = 23; air, n = 23). Oxygen supplementation was associated with a 29 percent mean reduction in pain on visual analogue scoring compared with air placebo over the entire period of inhalation (p = 0.027). Oxygen also extended the time to visual analogue scale score of 40 mm or more by a mean of 6½ minutes compared with air placebo (p = 0.008). CONCLUSIONS: Oxygen is a readily available, low-risk, low-cost treatment that significantly reduced tourniquet-associated pain in this study and significantly increased the time taken to reach visual analogue scale score of 40 or more. The authors recommend oxygen to facilitate hand surgery under a tourniquet and when a regional block fails to control tourniquet pain.