An international consensus algorithm for management of chronic postoperative inguinal pain.

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Abstract

Tension-free mesh repair of inguinal hernia has led to uniformly low recurrence rates. Morbidity associated with this operation is mainly related to chronic pain. No consensus guidelines exist for the management of this condition. The goal of this study is to design an expert-based algorithm for diagnostic and therapeutic management of chronic inguinal postoperative pain (CPIP).

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International guidelines for prevention and management of post-operative chronic pain following inguinal hernia surgery.

S Alfieri, G B Doglietto, A Wijsmuller … (2011)

To provide uniform terminology and definition of post-herniorrhaphy groin chronic pain. To give guidelines to the scientific community concerning the prevention and the treatment of chronic groin and testicular pain. A group of nine experts in hernia surgery was created in 2007. The group set up six clinical questions and continued to work on the answers, according to evidence-based literature. In 2008, an International Consensus Conference was held in Rome with the working group, with an audience of 200 participants, with a view to reaching a consensus for each question. A consensus was reached regarding a definition of chronic groin pain. The recommendation was to identify and preserve all three inguinal nerves during open inguinal hernia repair to reduce the risk of chronic groin pain. Likewise, elective resection of a suspected injured nerve was recommended. There was no recommendation for a procedure on the resected nerve ending and no recommendation for using glue during hernia repair. Surgical treatment (including all three nerves) should be suggested for patients who do not respond to no-surgery pain-management treatment; it is advisable to wait at least 1 year from the previous herniorraphy. The consensus reached on some open questions in the field of post-herniorrhaphy chronic pain may help to better analyze and compare studies, avoid sending erroneous messages to the scientific community, and provide some guidelines for the prevention and treatment of post-herniorraphy chronic pain.

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Risk factors for long-term pain after hernia surgery.

Ulf Fränneby, Gabriel Sandblom, Pär Nordin … (2006)

To estimate the prevalence of residual pain 2 to 3 years after hernia surgery, to identify factors associated with its occurrence, and to assess the consequences for the patient. Iatrogenic chronic pain is a neglected problem that may totally annul the benefits from hernia repair. From the population-based Swedish Hernia Register 3000 patients aged 15 to 85 years were sampled from the 9280 patients registered as having undergone a primary groin hernia operation in the year 2000. Of these, the 2853 patients still alive in 2003 were requested to fill in a postal questionnaire. After 2 reminders, 2456 patients (86%), 2299 men and 157 women responded. In response to a question about "worst perceived pain last week," 758 patients (31%) reported pain to some extent. In 144 cases (6%), the pain interfered with daily activities. Age below median, a high level of pain before the operation, and occurrence of any postoperative complication were found to significantly and independently predict long-term pain in multivariate logistic analysis when "worst pain last week" was used as outcome variable. The same variables, along with a repair technique using anterior approach, were found to predict long-term pain with "pain right now" as outcome variable. Pain that is at least partly disabling appears to occur more often than recurrences. The prevalence of long-term pain can be reduced by preventing postoperative complications. The impact of repair technique on the risk of long-term pain shown in our study should be further assessed in randomized controlled trials.

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Prospective study of chronic pain after groin hernia repair.

T Callesen, K Bech, H Kehlet (1999)

The aim was to provide a detailed description of any residual pain 1 year after elective day-case open groin hernia repair under local anaesthesia. This was a prospective consecutive case series study by questionnaire of 500 consecutive operations in 466 unselected adult patients 1 year after surgery. Pain was scored (none, mild, moderate or severe) at rest, while coughing and during mobilization, and compared with similar data collected 1 and 4 weeks after operation. Some 419 questionnaires were returned (response rate 93 per cent); 20 patients had died within the year and 30 data sets from patients who had a subsequent operation during the study were excluded. Eighty patients (19 per cent) reported some degree of pain, and 25 (6 per cent) had moderate or severe pain. Pain restricted daily function in 24 patients (6 per cent). The incidence of moderate or severe pain was higher after repair of recurrent than primary hernias (14 versus 3 per cent; P < 0.001). The risk of developing moderate or severe pain was increased in patients who had a high pain score 1 week after operation (9 versus 3 per cent; P < 0.05) and also in patients who had moderate or severe pain 4 weeks after operation (24 versus 3 per cent; P < 0.001). Chronic pain is a significant problem after open groin hernia repair. It may be worse after surgery for a recurrent hernia and may be predicted by the intensity of early postoperative pain.