Please select the eligibility criteria that correspond to the clinical trial below.
Title: Pilot Randomised Controlled Study Comparing The Effect of High Cut-off Point Haemofiltration With Standard Haemofiltration In Patients With Acute Renal Failure
Brief Summary: This trial aims to study the effect of combining continuous and a new polyamide membrane with larger pores in the treatment of critically ill patients with acute renal failure and low blood pressure (shock) requiring noradrenaline. The investigators wish to compare the clinical effect of this new therapy to that of haemofiltration with a standard membrane.


Options:
A: Inclusion Criteria:

1. Injury stage of RIFLE criteria or more: \> 2-fold increase in the serum creatinine or urine output \< 0.5 mL/kg/hr for 12 hours
2. Patients with any dialysis treatment before admission to the ICU or patients with end-stage renal failure and receiving dialysis
3. Informed consent has been obtained.

Exclusion Criteria:

1. patient age \< 20 years or \> 85 years
2. life expectancy less than 3 months (ex. terminal stage of malignancy)
3. Child-Pugh class C liver cirrhosis
4. pregnancy or lactation
5. history of anticoagulation prior to the randomization
6. bleeding tendency (platelet count \< 50,000/ul, INR \> 2.5, PTT \> 65, or fibrinogen \< 1.00 g/L)
7. history of hemorrhagic disease (ex. GI bleeding, cerebral hemorrhage, pulmonary hemorrhage)
B: 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
C: Inclusion Criteria:

1. Patients admitted to intensive care unit (ICU) of age \>18 years with decision based on the clinical situation of the patient taken by the physician in charge that continuous renal replacement therapy will be started.
2. Vasoconstrictor and volume dependent septic shock with known Gram-negative infectious agent in blood culture.
3. Vasoconstrictor and volume dependent septic shock suspected to be caused by a Gram-negative agent and with positive plasma endotoxin test.

Exclusion Criteria:

1. Infected with Hepatitis B or C or HIV.
2. Dependence on dialysis treatment before the actual ICU episode.
D: Inclusion Criteria:

* The treating clinician believes that the patient requires haemofiltration for acute renal failure
* The patient is on noradrenaline infusion for haemodynamic support
* The patient was commenced on noradrenaline or haemofiltration within the last 12 hours
* The clinician is uncertain about the balance of benefits and risks likely to be conferred by treatment with different membranes
* The treating clinicians anticipate treating the patient with haemofiltration for at least 72 hours
* Informed consent has been obtained
* The patient fulfils ONE of the following clinical criteria for initiating haemofiltration:
* Oliguria (urine output \< 100 ml/6 hr) 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 mmol/L
* Clinically significant organ oedema in the setting of ARF (e.g., lung)

Exclusion Criteria:

* Patient age is \< 18 years
* Death is imminent (\< 24 hours)
* There is a strong likelihood that the study treatment would not be continued in accordance with the study protocol
* The patient has been treated with haemofiltration or other dialysis previously during the same hospital admission
* The patient was on maintenance dialysis prior to the current hospitalisation
* Any other major illness that, in the investigator's judgment, will substantially increase the risk associated with the subject's participation in this study
* The patient is pregnant or is breastfeeding
* The patient has previously been enrolled in this study

Answer: D