Functional Outcome After Groin Hernia Mesh Repair: Open Versus Laparoscopy (GENINGHERNIA)
Recruitment status was Recruiting
|First Received Date ICMJE||February 19, 2008|
|Last Updated Date||April 10, 2008|
|Start Date ICMJE||April 2008|
|Estimated Primary Completion Date||April 2011 (final data collection date for primary outcome measure)|
|Current Primary Outcome Measures ICMJE
||Chronic significant post operative pain [ Time Frame: preoperative, 10, 30, 90, 365 and 730 postoperative days ] [ Designated as safety issue: No ]|
|Original Primary Outcome Measures ICMJE||Same as current|
|Change History||Complete list of historical versions of study NCT00625534 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE
|Original Secondary Outcome Measures ICMJE
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Functional Outcome After Groin Hernia Mesh Repair: Open Versus Laparoscopy|
|Official Title ICMJE||Chronic Significant Pain and Functional Outcome After Laparoscopic Versus Open Groin Hernia Mesh Repair: Design of a Randomized Controlled Clinical Trial|
Background: Large acceptance of mesh reinforcement techniques in groin hernia repair lowered recurrence rates for all techniques. Recurrence rate alone is not the main quality criterion for hernia repair anymore. Chronic significant post operative pain is a common, clinically relevant, poorly understood and poorly studied entity which is 3 to 5 times more common than hernia recurrence. As a subgroup to chronic significant post operative pain or as a separate entity, sexual dysfunction due to ejaculatory and genital pain after inguinal hernia repair may happen in approximately 2.5% of patients. Patient's preoperative psychological profile as well as pain exposure history is showed to be important in the development of chronic significant post operative pain. The objective of this study is to analyse chronic significant post operative pain and the functional outcome status of patients after laparoscopic repair compared to open repair.
Methods: A randomized controlled non-blinded clinical trial is designed to compare open inguinal hernia mesh repair with laparoscopic totally extraperitoneal repair on chronic significant post operative pain, pain related sexual function disorders, complications, health related quality of life outcomes, recurrence rates, and cost. Volunteers will be recruited in Geneva University Hospital, department of surgery, visceral surgery unit. Eligibility criteria is male patient aged over 21 years, with reducible inguinal unilateral or bilateral primary hernia who are candidates for elective surgery and medically fit for general anesthesia.130 patients will be enrolled for each group to achieve an α-Level of 0.05 and a power of 80%. Follow-up will take place at 10th, 30th days as well as 3 12 and 24 post operative months by questionnaires and by clinical exam by independent expert. An overall cost-analysis will be realized. Patient enrollment in the study will start in April 2008 and estimated to end in may 2009.
Hernia repair is the most frequent elective operation performed in general surgery. Chronic pain or persistent neuralgia has been recognized as a complication after inguinal hernia repair but was reported in the 1980s as a rare and infrequent condition. Studies from the mid 1990s have reported a higher frequency, with up to 50% of patients reporting pain after hernia repair more than 1 year after surgery. Chronic pain after hernia repair can be disabling, with considerable impact on quality of life. The natural history of postoperative pain, including its prevalence, etiology, duration, associated disability and it's social and economical impact remain undefined.
The Cooperative Hernia Study (1996) assessing postoperative pain in a prospective trial including 315 open non-mesh repair patients with 2 years follow-up found at 1 year, 62.9% of groin or inguinal pain and 11.9% of patients had moderate to severe pain; 53.6% had pain and 10.6% of patients continued to report moderate to severe pain 2 years postoperatively.
In a prospective consecutive case series study of 500 consecutive operations in 466 unselected adult patients for open groin hernia repair in Denmark (1994-1996), 1 year after surgery, 19% of patients had some degree of pain, 6% had moderate or severe pain. Pain restricted daily function 6% of patients.
A cross-sectional cohort study based on the Danish Hernia Database (1998) to determine the incidence of groin pain 1 year after inguinal hernia repair and to assess the influence of chronic groin pain on function, detected 28.7% of pain in the groin area and 11.0% of the patients reported that pain was interfering with work or leisure activity. There were no difference in the incidence of pain with regard to the different types of hernia, the different types of surgical repairs, or the different types of anesthesia.
A questionnaire survey of a historical cohort of 351 patients who underwent inguinal hernia surgery in Aberdeen - Scotland (1995-1997) reported 30% chronic pain. Character of this pain was predominantly neuropathic.
Definition of chronic pain The definition of "chronic pain" by the International Association of the Study of Pain is "pain lasting for 3 months or more". There is no consensus on neither in the definition, nor the severity grades of CSPOP in the literature. In the Cooperative Hernia Study, Cunningham et al. clearly described mild, moderate, and severe pain. Mild pain was defined as an occasional pain or discomfort that did not limit activity, with a return to lifestyle before hernia; moderate pain, as pain preventing return to normal preoperative activities (i.e., inability to continue with activities before hernia such as golf, tennis, or other sports, and inability to lift objects without pain, that patients had been lifting before the hernia occurrence); and severe pain, as pain that incapacitated the patient at frequent intervals or interfered with activities of daily living (i.e., a pain constantly present, or intermittently present but so severe as to impair normal activities, such as walking). Other studies defined chronic pain as "that persisting for one year postoperatively". One Dutch study defined pain as pain in the groin or scrotum lasting more than 1 month after surgery. In our study chronic pain is defined as a minimal score > 4 using the quadruple visual analogue scale (VASQ) 3 months after procedure.
Characteristics and etiology of chronic pain Somatic, neuropathic, and visceral chronic pain syndromes are described. Cunningham et al. reported the somatic pain syndrome as the most common type of chronic post hernia pain. The pain is localized to common ligamentous insertion to the pubic tubercle. Somatic pain may be due to the damage to the pubic tubercle during the stapling of mesh prosthesis or from deep muscle layers. Incorporation of the periosteum of the pubic tubercle into the most medial suture during open hernia repair is accused. Neuropathic pain is probably attributable to damage to the ilioinguinal or genitofemoral nerve. Neuropathic pain usually develops in the sensory distribution of an injured nerve. Chronic residual neuralgia occurs as a result of surgical handing of sensory nerves. The nerve trauma can be due to partial or complete division, stretching, contusion, crushing, electrical damage, or sutures compression. Secondary nerve damage can occur due to irritation or compression by an adjacent inflammatory process such as granuloma. Neuropathic pain described as pulling, tugging, tearing, throbbing, stabbing, shooting, numbing, and dull. The onset of neuropathic pain is often delayed, occurring after a latent period of days to weeks. Pain is often aggravated by ambulation, stooping or hyperextension of hip and sexual intercourse; and alleviated by recumbent position and flexion of the hip and thigh. In laparoscopic hernia repair when stapling the mesh, it can penetrate the wall of the inguinal canal entrapping and irritating the sensory nerves. Kinking of the nerves may cause chronic irritation. The third pain syndrome described in the literature is visceral. For example, pain encountered only on ejaculation due to dysfunction of periurethral structures involved in ejaculation. One possible mechanism is the injury to either somatic sacral or sympathetic nerves, resulting in dyssynergia of the ejaculatory effector muscles. It can also be due to stricture in the spermatic duct from the scar tissue or twisting of the cord.
Prognosis of chronic pain Once chronic pain is installed, it does not change without a radical treatment. Cunningham et al. reported a prevalence of mild, moderate, or severe pain of 63% at 1 year postoperatively, which was reduced to 54% after 2 years. Those patients who reported moderate to severe pain at 1 year (12%) continued to report persistent pain at 2 years (11 %).
Risk of developing chronic pain
Impact of surgical technique Several different surgical techniques are studied with each other in the literature and different meta analyses, each with different point of interest, gives different lectures of the reality. Despite the fact that there is no consensus in the literature, surgical technique is clearly one of the key parameters. The overall frequency of chronic pain is higher in studies with specific measurements, where pain is the primary outcome of interest.
|Study Type ICMJE||Interventional|
|Study Phase||Phase 4|
|Study Design ICMJE||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Study Arm (s)||
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||260|
|Estimated Completion Date||April 2011|
|Estimated Primary Completion Date||April 2011 (final data collection date for primary outcome measure)|
|Eligibility Criteria ICMJE||
|Ages||21 Years to 70 Years|
|Accepts Healthy Volunteers||No|
|Location Countries ICMJE||Switzerland|
|NCT Number ICMJE||NCT00625534|
|Other Study ID Numbers ICMJE||05-122|
|Has Data Monitoring Committee||No|
|Responsible Party||Ihsan INAN M.D. Chef de Clinique, Visceral Surgery Division, Department of Surgery, Geneva University Hospital|
|Study Sponsor ICMJE||University Hospital, Geneva|
|Collaborators ICMJE||Not Provided|
|Information Provided By||University Hospital, Geneva|
|Verification Date||April 2008|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP