***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: We included in this updated review five RCTs with a total of 403 participants, and we added two new trials identified during the 2015 search. One of the included studies was found to have a high risk of bias; no trial featured all pre-specified outcomes. We found two trials for which data are awaited for classification and one ongoing trial. Three studies compared advanced haemodynamic monitoring with a protocol using standard measures; three compared advanced haemodynamic monitoring with usual care; and one compared a protocol using standard measures with usual care. Meta-analyses for the two advanced haemodynamic monitoring comparisons are consistent with both increased and decreased risk of mortality (RR Mantel-Haenszel (M-H) random-effects 0.41, 95% confidence interval (CI) 0.14 to 1.20; 280 participants; RR M-H random-effects 0.45, 95% CI 0.07 to 2.95; 213 participants, respectively). The study comparing a protocol with usual care found no difference between groups for this outcome. Three studies comparing advanced haemodynamic monitoring with usual care reported data for length of stay and time to medical fitness. There was no statistically significant difference between groups for these outcomes in the two studies that we were able to combine (MD IV fixed 0.63, 95% CI -1.70 to 2.96); MD IV fixed 0.01, 95% CI -1.74 to 1.71, respectively) and no statistically significant difference in the third study. One study reported reduced time to medical fitness when comparing advanced haemodynamic monitoring with a protocol, and when comparing protocol monitoring with usual care. The number of participants with one or more complications showed no statistically significant differences in each of the two advanced haemodynamic monitoring comparisons (RR M-H random-effects 0.83, 95% CI 0.59 to 1.17; 280 participants; RR M-H random-effects 0.72, 95% CI 0.40 to 1.31; 173 participants, respectively), nor any differences in the protocol and usual care comparison. Only one study reported the number of participants able to return to normal accommodation after discharge with no statistically significant difference between groups. There were few studies with a small number of participants, and by using the GRADE (Grades of Recommendation, Assessment, Development and Evaluation Working Group) approach, we judged the quality of the outcome evidence as low. We had included one study with a high risk of bias, but upon applying GRADE, we downgraded the quality of this outcome evidence to very low. Five studies including a total of 403 participants provided no evidence that fluid optimization strategies improve outcomes for participants undergoing surgery for PFF. Further research powered to test some of these outcomes is ongoing.
Output:

Evidence is current to September 2015. We found five studies with 403 participants, each of which compared two or three methods of guiding fluid therapy. These methods include 'usual care' (whereby staff use changes in basic measurements, such as heart rate, to decide for themselves how much fluid to give), 'protocols using standard measures' (whereby staff use changes in basic measurements when giving fluid according to a formal set of rules) and 'advanced haemodynamic monitoring' (whereby staff use invasive equipment, such as specialized blood pressure monitoring devices placed into arteries, to determine how much fluid to give). These trials found no evidence to suggest that using one method instead of another reduces harm, including death, or decreases the number of complications. We found no evidence, when study results were combined, indicating that any method reduced length of hospital stay or time that participants were assessed as medically fit for discharge. Results also showed no difference in the number of participants able to return to normal accommodation after discharge. We found few relevant studies with only a small number of participants. The time difference between the earliest study, published in 1985, and the latest study, published in 2014, suggests that standard practice for managing hip fracture may differ between these studies. We judged one study as having a high risk of bias, and we used the GRADE approach to assess evidence quality as low or very low. Results of the review are applicable only to countries in which the relevant studies were conducted, as 'usual care' may differ in other countries. Current evidence is insufficient to show which method of finding maximum effective fluid levels in people undergoing hip fracture surgery is preferable.