24 Hour Use of the Wearable Artificial Kidney

Subjects will undergo 24 hours in-hospital treatment with the Wearable Artificial Kidney
(WAK). Up to 10 subjects with ESRD will complete the protocol in its entirety.

The objective of this protocol is to provide additional preliminary data supporting the
hypothesis that the WAK safely and effectively delivers dialysis therapy that is at least
equal to the current standard of care for treatment of ESRD using conventional machines for
thrice weekly hemodialysis treatments. These objectives would be accomplished by absence of
adverse events during treatment with the WAK, along with effective removal of fluid and
solutes at least equal to those delivered with conventional currently used dialysis
machines. The WAK will be the only investigational device used in this study.

The reason for this trial is to advance the eventual approval of this device to be legally
commercialized as it potentially may respond to the unmet public health needs to improve
outcomes and reduce costs in the treatment of ESRD patients.

Inclusion Criteria:

- Patient willing and competent to sign the approved informed consent.

- Patient must be at least 21 years of age or older.*

- Patient must weigh between 45 and 100kg, inclusive.*

- Patient must have End Stage Renal Disease and currently undergoing consistent
intermittent HD at least 3 times a week for at least 3 months prior to being
enrolled.*

- Vascular access must be through a functioning double lumen catheter with no
thrombolytic therapy or clotting of the catheter within the past 4 weeks.*

- Willing to comply with the requirements of experimental treatment with the WAK for up
to 24 hours.

- Expected survival of no less than 6 months.*

- Consent to allow review of their medical records by the investigators, and monitors.

- Fluency in English

- Hemoglobin level ≥ 9.0 g/dL prior to WAK treatment

Exclusion Criteria:

- • Anticipating or scheduled for a living related donor kidney transplant in less than
2 months.**

- History (within the 12 weeks prior to the study) of cardiovascular events
including:*

- Unstable angina

- Myocardial Infarction

- Stroke

- Clinical Significant Arrhythmia

- Life threatening arrhythmia within the past 30 days*

- Severe intradialytic hypotension within the last 30 days*

- Shock within the last 30 days*

- Hemodynamic instability as demonstrated by repeated episodes of hypotension or
hypertension requiring intervention by dialysis personnel or representing a
present hazard to the patient*

- Seizure disorder requiring active treatment for a seizure episode during the
last 6 months*

- Major Surgery (excluding vascular access surgery) within the past 30 days *

- Currently receiving intravenous antibiotic therapy for systemic infection*

- Clinical evidence of metastatic malignancy, receiving radiation or chemotherapy,
within the past 365 days*

- Active bleeding*

- Hematological disease (e.g. malignancies, hemolytic anemia, thrombocytopenia),
and other conditions that may interfere of confuse the data obtained from this
trial.*

- Current enrollment in another investigational device or drug trial.**

- Subject is pregnant (e.g., positive HCG test) or is breast feeding.

- Subject has any disorder (excluding illiteracy or visual impairment) that
compromises the ability of the subject to give written informed consent and/or
to comply with the study procedures.*

- Allergy to heparin or ethylene oxide.*

- Hypertension deemed uncontrolled, at the discretion of the investigator, within
the past 30 days.*

- Has an implantable electronic device (e.g. pacemaker)*

- As documented in patient medical history (see attached). **Patient
self-report.