Please select the eligibility criteria that correspond to the clinical trial below.
Title: Multicentre, Unblinded, Open Label, Randomised, Controlled Trial to Assess the Effect of Augmented Vs. Normal Continuous Renal Replacement Therapy (CRRT) on 90-Day All-Cause Mortality of Intensive Care Unit Patients With Severe Acute Renal Failure (ARF).
Brief Summary: This study seeks to determine if increasing the dose of continuous renal replacement therapy (CRRT) reduces 90-day all cause mortality in Intensive Care Unit (ICU) patients with severe acute renal failure (ARF).


Options:
A: Inclusion Criteria:

1. The treating clinician believes that the patient requires CRRT for acute renal failure.
2. The clinician is uncertain about the balance of benefits and risks likely to be conferred by treatment with higher intensity or lower intensity CRRT.
3. The treating clinicians anticipate treating the patient with CRRT for at least 72 hours.
4. Informed consent has been obtained
5. The patient fulfils ONE of the following clinical criteria for initiating CRRT:

   * Oliguria (urine output \< 100ml/6hr) that has been unresponsive to fluid resuscitation measures.
   * Hyperkalemia (\[K+\] \> 6.5 mmol/L).
   * Severe acidemia (pH \< 7.2).
   * Urea \> 25 mmol/liter.
   * Creatinine \>300 micromol/L in the setting of ARF.
   * Clinically significant organ oedema in the setting of ARF (eg: lung).

Exclusion Criteria:

1. Patient age is \<18 years.
2. Death is imminent (\<24 hours).
3. There is a strong likelihood that the study treatment would not be continued in accordance with the study protocol.
4. The patient has been treated with CRRT or other dialysis previously during the same hospital admission.
5. The patient was on maintenance dialysis prior to the current hospitalisation.
6. The patient's body weight is \<60 kg or \>100kg.
7. Any other major illness that, in the investigator's judgment, will substantially increase the risk associated with the subject's participation in this study.
B: Inclusion Criteria:

* Thrombocytopenia suspicious for HIT with decrease in platelet count \>50% from baseline obtained at hospital admission
* 4 T´s score for HIT probability \>3 AND/OR positive ELISA for HIT
* Age ≥18 years
* Informed consent (if applicable)

Exclusion Criteria:

* Transient thrombocytopenia due to intraoperative bleeding
* Active bleeding
* Intracranial operations
* Liver dysfunction with spontaneous aPTT\> 60 sec.
* History of adverse events or sensitivity against study drugs
* Pregnancy
* Age\<18 years
* Preexisting psychiatric/neurologic disorders with long-term inability to provide informed consent
C: Inclusion Criteria:

* Critical ill patients who need continuous renal replacement therapy
* Continuous anticoagulation therapy is not necessarily during CRRT process

Exclusion Criteria:

* Patients needing continuous anticoagulation during each CRRT process
* Expectant survival time less than 72 hours
* Extremely unstable vital signs such as low blood pressure
* Any reasons that resulting in blood flow rate less than 150ml/min
* Pregnant women
* Patients allergic to heparin
D: Inclusion Criteria:

* Admitted in intensive care unit (ICU)
* Requiring hemodialysis
* Clinicians have the choice between jugular and femoral routes

Exclusion Criteria:

* Chronic renal failure requiring long term dialysis

Answer: A