***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: Four studies involving 971 participants were included. All results were reported using a zero to 10 pain scale. Three studies (four treatment arms) involving 498 participants compared subcutaneous lignocaine with control with no significant difference between pain scores; MD 0.12 (95% confidence interval (CI) -0.46 to 0.69). Two studies (three treatment arms) involving 399 participants compared intravenous pain regimens with control. A significant reduction in pain score was observed with intravenous opioid and anxiolytic; MD -0.90 (95% CI -1.54 to -0.27). One study involving 60 participants compared levobupivacaine with placebo. Longer-acting local anaesthetic significantly lowered the pain score by a MD of -1.10 (95% CI -1.26 to -0.94). The data are insufficient to identify any influence of pain regimens on vascular and procedural complication rates. No studies reported appropriate blinding for all treatment arms. The largest study, comprising 661 participants, was unblinded with a quality score of two out of five. No new studies have been found since the last version of this review and the conclusions therefore remain the same. Intravenous pain regimens and levobupivacaine may have greater efficacy when compared to control for the management of pain related to femoral sheath removal. However, a definitive study is still required because the clinical difference is small. There is no evidence to support the use of subcutaneous lignocaine. There is insufficient evidence to determine if pain relief influences the rate of complications. One new study has been included as a 'study awaiting assessment' as we await further information from the study authors.
Output:

In this systematic review of randomised controlled trials four studies were reviewed. Three studies involving 498 participants compared subcutaneous lignocaine, a short-acting local anaesthetic, with a control group (participants received either no pain relief or an inactive substance known as a placebo). Two studies involving 399 people compared intravenous opioids (fentanyl or morphine) and an anxiolytic (midazolam) with a control group. One study involving 60 people compared subcutaneous levobupivacaine, a long-acting local anaesthetic, with a control group. Intravenous pain regimens and subcutaneous levobupivacaine appear to reduce the pain experienced during femoral sheath removal. However, the size of the reduction was small. A significant reduction in pain was not experienced by participants who received subcutaneous lignocaine or who were in the control group. There were insufficient data to determine a correlation between pain relief administration and either adverse events or complications. Some patients may benefit from routine pain relief using levobupivacaine or intravenous pain regimens. Identifying who may potentially benefit from pain relief requires clinical judgement and consideration of patient preference. The mild level of pain generally experienced during this procedure should not influence the decision as some people can experience moderate levels of pain with the conventional wound care.