OSCAR I STUDY - The ONCObind CTC Removal Study

Study Intervention: All study patients will be assigned to receive treatment with the

investigational device (Onco-Seraph 100).

Study Duration: Our target enrollment is 30 patients with PDAC. The study will last for

up two years. Interim analyses will determine early stopping for safety. This is detailed

in Section 23: Data Safety Monitoring Board (DSMB). Furthermore, as the safety and

effectiveness of the experimental use of the ONCO Seraph 100 Microbind Affinity Blood

Filter for treatment of patients with PDAC is unknown, patients will be followed for up

to 5 years to inform oncological outcomes.

Procedure Setting: Extracorporeal blood purification utilizing Seraph can be performed

either on an outpatient or an in-patient basis as HD/CRRT procedure is performed

routinely in both settings. Whether the procedure will be performed in a setting of an

outpatient or in-patient setting would mainly depend on the personalized approach that

the Site Investigator choses related to individual patient enrolled in the study.

Location of the Seraph treatment will be recorded, and data analysis will include

consideration of the setting as it relates to study endpoints. If the Study Procedure is

implemented in an outpatient setting subject will be monitored for additional 4 hours.

Procedure Duration for Onco-Seraph 100: A sufficient blood flow rate and exposure of

patient's blood to the Onco-Seraph 100 adsorption media was initially established based

on the experience in implementing procedure in patients with blood stream infections.

However, target procedure duration is further optimized based on data collected in EU

oncology patients as listed below:

The average procedure duration and blood flow rates targeted in patients with blood

stream infections or oncology are as follows:

- At an average blood flow of 350mL/min, this would translate to approximately 5 hours

of procedure time for patients with blood stream infection or 2.0hrs for oncology

patient; an average of 200mL/min translates to a procedure time of 8 hours for blood

stream infection or 3.5hrs for oncology patient.

- 1st stage: Study Procedure will occur only once, followed by weekly follow up visits

through day 28, followed by monthly follow up through Day 60

- 2nd stage: Study Procedures will occur up to 3 times for the first week followed by

once weekly for the following 3 weeks, for a total of up to 6 treatments over the

first 28 days of study participation.

- Study Procedure(s) will be held, if subjects are hemodynamically unstable and unable

to tolerate extracorporeal procedure (defined as MAP<65 and/or sustained hypotension

at enrollment as defined by two readings with systolic blood pressure (SBP)

measurements below 100 mmHg or diastolic blood pressure (DBP) measurements below 50

mmHg. The measurements must be performed thirty minutes from one another, and the

Subject must be resting for at least 5 minutes prior to obtaining each measurement.

(If the first reading includes a SBP greater than 100 mmHg and a DBP greater than 50

mmHg, the second reading does not need to be taken).

Subjects will be assessed per study visit and as part of routine, standard of care for

PDAC. All subjects enrolled in this study will undergo clinical efficacy, safety, and

laboratory assessments. Blood, urine, and respiratory samples will be obtained at

baseline, Day 1 Day 4, Day 7, 14, 21 and Day 28. Demographic and baseline clinical

parameters will be recorded at the time of enrollment. Pertinent clinical parameters will

be recorded on days 1, 3, 5, 7, 14, 21 and once on day 28. Outcomes data will be recorded

on day 28 and at the time of hospital discharge or death. Subject status will be assessed

at, 1, 3, 5, 7, 14, 21 28 or30, and 60 days to include adverse event evaluation and a

targeted medication review. Survival status will be assessed 30 and 60 days after

enrollment.

Patients will receive standard of care follow-up for up to 5 years and this data

collected will be made available for FDA review.

A subset of the protocol team will review Grade 3 and 4 adverse event or serious adverse

event (AE / SAE) data every 2 weeks. If there is a pattern of unexpected AEs that is out

of proportion to the current understanding of the natural history of the disease, the

DSMB will be asked to review un-blinded safety data in an ad hoc meeting. If an ad hoc

meeting of the DSMB is convened to review a serious, device-related adverse event,

enrollment will be halted pending the DSMB review to ensure subject safety in the trial.

The DSMB will review the event to ensure subject safety. After the review, the DSMB will

determine if enrollment may resume.

The DSMB will conduct an interim analysis after the enrollment of 10 subjects to evaluate

for safety and efficacy prior to completion of enrollment (n=30) (as detailed in Section

23: Data Safety Monitoring Board (DSMB)) and will be available for ad hoc reviews for

safety concerns as described above. As stated above, enrollment will be halted pending

the convening of an ad hoc DSMB meeting to review a serious, device-related adverse

event.

The DSMB will review the event to ensure subject safety in the trial. The DSMB will

determine if enrollment may resume. The DSMB may recommend temporary or permanent

cessation of enrollment based on their safety reviews.

As part of the initial PK study, DSMB will also review safety data after the first 2 and

5 subjects consented and treated. If there are significant safety concerns after DSMB

review, the sponsor will immediately pause the trial and communicate the information with

the FDA.

The safety data of the first 5 subjects will be reported to FDA for review. Study

expansion will be allowed via FDA pre-approved IDE supplement prior to commencing

enrollment of the remaining subjects.