Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: Blood transfusion during perioperative period in patients undergoing to major surgery has been associated to several postoperative complications. Particularly in oncologic surgery, red blood cell transfusion has been investigated as a factor of worse outcome and cancer recurrence due to postoperative impairment of cellular immunity. Although red blood cell transfusion has decreased in worldwide clinical practice, this issue still remains a matter of controversy in oncologic surgery. There are no prospective studies comparing outcomes between restrictive or liberal of blood transfusion strategy in oncologic surgery. This study is a prospective and randomized study comparing clinical outcomes between two strategies of transfusion in oncologic surgery - liberal or restrictive


Options:
A: Inclusion Criteria:

* Age \> 18 years old
* Anticipated or proven admission to immediate postoperative resuscitation after scheduled or emergency oncology surgery, for the removal of a neoplastic lesion among the following surgical procedures:

  * Visceral surgery: Hepatectomy, duodenopancreatectomy, gastrectomy, esophagectomy, colectomy
  * Urological surgery: Radical prostatectomy, cystectomy, nephrectomy.
  * Gynaecological surgery: Ovariectomy, hysterectomy, mastectomy, pelvectomy
  * Thoracic surgery: Pneumonectomy, lobectomy
  * ENT Surgery: Total laryngectomy, pharyngectomy, glossectomy
  * Spinal surgery: corporectomy wherever it is performed.
* Hemoglobin level \< 9.5 g/dl between the day before surgery (D-1) and discharge from resuscitation at no more than 30 days postoperatively

Exclusion Criteria:

* - Myocardial infarction and/or unstable angina in the 4 weeks prior to surgery
* Refusal to participate in the study
* Minor patient (age \< 18 years)
* Refusal to transfuse red blood cell concentrates (Jehovah's Witness)
* Pregnant or breastfeeding women
* Patients under guardianship or curatorship
B: Inclusion Criteria:

* Age 18 or older
* Planned cardiac surgery using cardiopulmonary bypass
* Informed consent obtained
* Preoperative European System for Cardiac Operative Risk Evaluation (EuroSCORE I) of 6 or more

Exclusion Criteria:

* Patients who are unable to receive or who refuse blood products
* Patients who are involved in a preoperative autologous pre-donation program
* Patients who are having a heart transplant or having surgery solely for an insertion of a ventricular assist device
* Pregnancy or lactation (a negative pregnancy test must be obtained prior to randomization for women of childbearing potential.)
* Patients who are unable to receive or who refuse blood products
C: Inclusion Criteria:

1. Age ≥18 years old at time of presentation
2. First ever episode aneurysmal SAH
3. Confirmed aneurysmal SAH diagnosis: as confirmed by treating Neurosurgeon or Neuro-interventionalist and supported by blood in subarachnoid space (demonstrated on cranial imaging or cerebrospinal fluid positive for xanthochromia) that is the result of a ruptured saccular aneurysm (confirmed by cranial imaging - cranial topography or magnetic resonance imaging angiography or catheter angiogram)
4. Incident hemoglobin ≤100g/L within 14 days following SAH (defined by first day of hospital presentation)

Exclusion Criteria:

1. Physician and or family decision to withdraw/withhold critical care at time of enrolment
2. Active bleeding with hemodynamic instability at time of enrolment
3. Patients with contra-indication or known objection to blood transfusions
4. SAH due to causes other than saccular aneurysm rupture including mycotic, traumatic and dissecting aneurysms, and aneurysms associated with arteriovenous malformations.
D: Inclusion Criteria:

* Patients with cancer after major abdominal surgery requiring post-operative ICU admission
* Adults patients

Exclusion Criteria:

* Age less than 18 year
* Hematologic Malignances
* Intensive care unit permanence lower than 24 hours
* Renal Chronic Failure in Renal Replacement Therapy
* Karnofsky Status \< 50
* Previous anemia (hemoglobin lower than 9 g/dL)
* Previous thrombocytopenia (platelet number lower than 50.000/mm3)
* Previous known coagulopathy
* Anticoagulation therapy
* Those unable to receive blood transfusion
* Patients who refused participation in the study

Answer: D