Please select the eligibility criteria that correspond to the clinical trial below.
Title: 1) The Effect of Xenon and Sevoflurane on Hypnosis Monitors. 2) Prevention of Postoperative Nausea and Vomiting. 3) Rescue Treatment of Established Postoperative Nausea and Vomiting. Sevoflurane.
Brief Summary: The purpose of this study is ad 1) to measure the depth of hypnosis as assessed by BIS and cAAI during an average general anesthesia with xenon or sevoflurane and to establish a reliable monitoring system for measuring and documenting the actual depth of hypnosis for the volatile anesthetics investigated. Ad 2) the question is to be answered whether 4 mg dexamethasone i.v. is an effective prophylactic treatment against postoperative nausea and vomiting in case of xenon or sevoflurane anesthesia. Ad 3) it serves to gain evidence about the (non-)effectiveness and kinetics of ondansetron as antiemetic remedy after xenon or sevoflurane anesthesia.


Options:
A: Inclusion Criteria:

* patients ≥ 18 \< 75 years
* ASA physical status I-II
* planned duration of anesthesia ≥ 60 minutes
* Apfel score ≥ 2-3
* elective (laparoscopic) surgery (abdominal, gynecological)
* women: with a highly effective contraception, defined as methods with a pearl index \< 1 (i.e. hormonal contraceptives, IUD)

Exclusion Criteria:

* history of hypersensitivity to any used drugs or additive components used for preparation and stabilization of the named drugs in this trial
* history or reasonable suspicion of malignant hyperthermia and/or degenerative neuromuscular disease, in the subject observed or blood relatives
* history of liver function disorders, leucocytosis and unclear fever after usage of halogenated anesthetics.
* any indisposition that may be aggravated by the use of the drugs investigated:
* liver and/or kidney function disorders
* severe acute or chronic infectious disease (i.e. viral, bacterial, fungal)
* elevated intracranial pressure
* history of gastrointestinal ulcer(s) or inflammatory bowel disease
* severe metabolic disorders
* hematoporphyria
* glaucoma
* hearing disorders
* any disease including air-filled closed cavities, such as pneumothorax, ileus
* pregnancy and lactation period
* subjects under the age of 18 years
* ambulatory surgery
* any disease that is associated with the requirement of a high oxygen yield and/or
* risk of high oxygen consumption:
* severe lung and/or airway disease
* coronary heart disease and/or seriously impaired cardiac function
* severe psychiatric disorder
B: Inclusion Criteria:

* Arthroscopic subacromial decompression and/or acromioclavicular resection
* General anaesthesia
* Daysurgery, Horsens Hospital

Exclusion Criteria:

* Incompetent
* Pregnant
* Age under 18 or over 90 years
* Allergy toward dexamethasone
* Diabetes
* Active gastric ulcer
* Untreated hypertension
* Glaucoma
* Daily use of glucocorticoids or strong opioids
* Daily use of analgesics for unrelated illness
* Myasthenia gravis
* Mitochondrial disorders
C: Inclusion Criteria:

* All patients undergoing breast surgery for carcinoma breast.
* Patients between ages 18 to 60 years.
* ASA I \\ II \\ III
* Patients weight between 40 and 70 kilograms.

Exclusion Criteria:

* Patient refusing consent
* Prophylactic anti emetic drug administration during intraoperative period
* Known case of prolonged QTc interval
* Known case decompensated cardiomyopathy
* Known case of cardiac arrhythmia or bundle branch block
* Case of congestive heart failure with left ventricular ejection fraction \<40%
* Abnormal serum level of potassium, calcium, magnesium
D: Inclusion Criteria:

* American Society of Anesthesiologists classes I-II female patients with breast cancer scheduled for surgical treatment; mastectomy plus axillary node dissection.

Exclusion Criteria:

* American Society of Anesthesiologists classes III and IV.
* Age more than 80 years; pregnancy; active menstruation; treatment with steroids; severe diabetes mellitus (serum HbA1c \> 8%); use of opioids, sedatives or any kind of analgesics less than one week before mastectomy, or a history of alcohol or drug abuse.
* Patients with any history of motion sickness and or previous postoperative nausea and vomiting after any surgical procedure.

Answer: A