Please select the eligibility criteria that correspond to the clinical trial below.
Title: Investigating the Effect of Intra-operative Infiltration With Local Anaesthesia on the Development of Chronic Postoperative Pain After Inguinal Hernia Repair. A Randomized Placebo Controlled Triple Blinded and Group Sequential Study Design
Brief Summary: The effect of intraoperative infiltration of the operation site with bupivacain on the development of chronic pain is the object of our trial. We hypothesize that the occurrence of chronic pain in the goup of patients receiving the infiltration will be 50% less than in the placebo group receiving normal saline. The study is a randomized controlled triple blinded trial with a sequential study design.


Options:
A: Inclusion Criteria:

* Non-emergent CD with planned spinal anesthesia
* American Society of Anesthesia physical status class I \& II
* Age ≥ 18 years
* Term gestational age (≥ 37 weeks)
* English-speaking

Exclusion Criteria:

* Morbid Obesity (BMI³ 45 kg/m2)
* Laboring women
* Emergency CD
* Severe maternal cardiac disease
* Subjects with significant obstetric co-morbidities
* Failed spinal anesthesia
* Patient enrollment in another study involving medication within 30 days of CD
* Any other condition which may impair ability to cooperate with data collection
* Height less than 152 cm (5'0")
* Fetal anomalies or intrauterine fetal death
B: Inclusion Criteria:

1. informed consent
2. age older than 18 to 80 years (inclusive)
3. scheduled for mastectomy because of breast cancer
4. American Society of Anesthesiologists (ASA) physical classification classes I - III

Exclusion Criteria:

1. Allergy to local anesthetics, fentanyl or morphine
2. severe cardiovascular disease (myocardial infarction within 6 months), profoundly decreased left ventricular function (ejection fraction \<40%) or high-grade arrhythmias
3. severe liver disease (known AST or ALT or billirubin \>2.5 times the upper limit of normal)
4. renal impairment (creatinine clearance less than 60)
5. pregnant or breast feeding
6. patient is enrolled in another study or have been in one in the last 30 days
C: Inclusion Criteria:

* Adult patients (≥ 18 years) with primary or recurrent single or double sided symptomatic but not incarcerated inguinal hernias with an elective hernia repair are included.
* No other interventions (i.e. umbilical hernia) are allowed.
* Written informed consent needs to be obtained.

Exclusion Criteria:

* Patients with legal incompetence,
* Pregnant and nursing women,
* Patients with presence or history of active malignancy or systemic diseases,
* Under immunosuppressive treatment,
* With systemic or severe local inflammation or infection,
* With wound healing disorders and with physical or mental incapacity, which makes it impossible to obtain informed consent are excluded.
* As pacemakers interfere with the electrical stimulation of the Pain Matcher® and vice versa patients with pacemakers or other implanted electrical devices were also excluded.
D: Inclusion Criteria:

* Patients with given inform consent, aged mor than 18 years, who undergo scheduled surgery of one of the following types: inguinal hernia (men), hysterectomy, thoracotomy (men).

Exclusion Criteria:

* Patients aged less than 18 years,
* Patients requiring reoperation because of surgical complications.

Answer: C