Crit-Line® IV Monitor

Providing Real-Time, Continuous Information to Help Achieve a More Effective Dialysis Treatment.



The Crit-Line® IV monitor measures hematocrit, percent change in blood volume and oxygen saturation in real time for application in the treatment of dialysis patients with the intended purpose of providing a more effective treatment for both the dialysis patient and the dialysis technician. Based on the data that the monitor provides, the clinician/nurse, under physician direction, intervenes (i.e., increases or decreases the rate at which fluid is removed from the blood) in order to remove the maximum amount of fluid from the dialysis patient without the patient experiencing the common complications of dialysis which include nausea, cramping and vomiting.




The Crit-Line IV monitor offers easy-to-interpret patient profiles that can help the clinician improve the accuracy of treatment assessment and intervention during hemodialysis. By monitoring blood volume percent changes, caregivers can adjust treatment as necessary to maximize fluid removal and prevent common symptoms of dialysis, such as nausea, vomiting and cramping.

An "A" profile indicates that the patient's plasma refill rate is occurring at the same or a greater rate than ultrafiltration. This profile suggests that the ultrafiltration rate might be increased without immediate risk of intradialytic symptoms.

A "B" profile is a gradual slope that has been targeted to find the best compromise between a high ultrafiltration rate and the prevention of intradialytic symptoms. The ideal slope is not a fixed percentage of change in BV and will vary from patient to patient.

A "C" profile is represented by a steep slope, which indicates a rapid decrease in blood volume and bears a higher risk for intradialytic symptoms such as lightheadedness, nausea, vomiting, cramping or hypotension.


Crit-Line IV Monitor

The Crit-Line IV Monitor is a fluid management monitoring tool that incorporates photo-optical technology to non-invasively measure absolute hematocrit and continuous oxygen saturation. In addition, the Crit-Line IV Monitor calculates the percent change in the dialysis patient's intravascular blood volume. The auto-scaling screen displays simultaneous graphic output of percent change in blood volume and oxygen saturation and or blood pressure versus time as well as alphanumeric output of hematacrit, oxygen saturation and percent change in blood volume.

Part Number CL10051001 - Crit-Line IV Color Touchscreen
Part Number CL10041001 - Sensor Clip


Blood Chambers

The Crit-Line blood chamber is a sterile, single-use, disposable, optical cuvette designed for use with the Crit-Line IV monitor's sensor clip during acute and chronic hemodialysis therapy to non-invasively measure hematocrit, percent change in blood volume and oxygen saturation. The blood chamber is connected between the arterial bloodline and the dialyzer within the extracorporeal circuit during the hemodialysis treatment.
Individually packaged and pre-sterilized disposable blood chambers for use with the Crit-Line IV monitor. Luer-Lock attachment between arterial blood line and the dialyzer. Single-use only, disposable.

Packaged 36 per box or 288 per case.
Part Number CL10041021

CLiC blood chamber + Combiset bloodline

The CombiSet SMARTECH Bloodline consists of a CombiSet Bloodline with an integrated CLiC blood chamber.  As a result, only one connection is required (i.e., to the dialyzer) instead of two connections. One simple connection is designed to reduce the potential for misthreadings and blood leaks. One product means there's more efficient inventory control and less to store.

CombiSet SMARTECH comes in cases of 24.
CombiSet SMARTECH with heparin line P/N 03-2722-9C
CombiSet SMARTECH without heparin line P/N 03-2742-9C


Pole Mount

Heavy-duty mounting system secures Crit-Line® IV monitor to IV pole of a hemodialysis machine. Frees up storage space on machine and protects monitor from accidental drops. Replacement only. All Crit-Line IV monitors come equipped with a pole mount.

Part Number CL10054004



Power Supply

Switching power supply provides operational power and battery charging from 120-240 VAC.

Part Number CL44300012



Power Cord

Three-pronged (i.e., grounded) power cord for use with USA and Canadian electrical outlets. Cords are medical grade.

Part Number CL90000035



Wireless Radios

These wireless radios are used to transmit Crit-Line IV monitor data at the end of each patient treatment.

Radios are used with the Crit-Line printer software V1.6 or higher.

When a wireless radio is inserted into the USB port of the Crit-Line IV monitor, the Crit-Line IV monitor ensures that the radio is functioning as a transmitting radio.

When a wireless radio is inserted into the USB port of a computer, it will function as a receiving radio. It is recommended that you have one wireless radio for every Crit-Line IV monitor and one wireless radio for your clinic's computer.

Part Number CL90000076



Printer Software

Allows for the printout of treatment profiles at the end of each treatment. Software is designed for Windows based operating systems. This software also allows for the collection of raw data (at one minute intervals) as well as electionic capture of the patient treatment profiles.

V 1.6 or higher.

Part Number CL10029504


Crit-Line Technology Support Line

Whether new to Crit-Line technology or an experienced veteran, questions present themselves.  We are here to lend a hand. Our team of highly trained, dedicated clinicians offer telephone assistance and Crit-Line III, Crit-Line IV and CLiC™ device-based support services.  We are available to answer your questions or connect you with the right resource 24 hours a day, 7 days a week. 




CLiC™ Device

2008T BlueStar™ Hemodialysis Machine

Caution: Federal (US) law restricts these devices to sale by or on the order of a physician.

Note: Read the Instructions for Use for safe and proper use of these devices. For a complete description of hazards, contraindications, side effects and precautions, see full package labeling.

© 2017, 2019-2022 Fresenius Medical Care. All Rights Re­served. Fresenius Medical Care, the triangle logo, 2008T BlueStar, Crit-Line, CombiSet SMARTECH and CLiC are trademarks of Fresenius Medical Care Hold­ings, Inc. or its affiliated companies. All other trademarks are the property of their respective owners. P/N 105242-01 Rev A 07/2022