Triton Technology:Small Vessel Volume Blood Flow

Small Vessel Transit Time Flowmeter Module --

Model 200-257

The new Small Vessel Transit Time Flowmeter is an extension of the highly successful ART² flowmeter for volume
blood flow measurement. The Small Vessel Flowmeter and probes are designed to work in large or small
experimental preparations. The probes are designed for either acute or chronic preparations. A number of these
probes have been implanted in renal arteries for over six months and are still functioning well.

The probes for the Model 257 utilize a reflected sound path in order to place both transducer elements on the same
side of the vessel. This has the advantage of allowing the probe to be placed on a partially imbedded vessel without
crimping or occluding the vessel. An example of this would be a coronary artery lying in a groove on the myocardial
surface. Since only the reflector must pas under the vessel, the probe may be applied without crimping or deforming
the vessel.

These probes are molded from a bio-compatible epoxy resin that has been loaded with glass micro-balloons. The
result is a very light weight probe which is well tolerated in chronic preparations. The Small Vessel Flowmeter is
presently available for blood vessels of 2 to 6.5 mm.

The Small Vessel Flowmeter automatically detects the size of the flowprobe which is attached and changes internal
timing and gain circuits to achieve a calibrated output voltage for subsequent recording or data acquisition.

A large front LCD display serves several functions. A running average MEAN FLOW is displayed while in the
RUN mode. If, however, the SIZE button is pressed while in the RUN mode, the probe size is displayed. This is a
helpful feature in a chronic preparations. In the CALIB mode the display shows the calibrate value. This should
agree with the RUN/CALIB switch verifying proper operation.

The user friendly Model 257 - Small Vessel Transit Time flowmeter is an important addition to the System 6 family
of physiologic monitoring modules.

Transit Time Volume Flow Probes - ART² 367 Series Probes

Click on picture for full size frame.

Acute use probe preparation

Implantable probes designed for acute or chronic use with the Model 257 - Active Redirection Transit Time (ART²)
Flow module. Probe has a 40 cm cable which directly connects to the module. Requires accessory cable 200-387
or 200-388. Optional connectors available; Triton skin button or bullet must be specified upon ordering.

                                                    
Part No.                           Item                      

200-367-1.0   1.0 mm Active Redirection Flow Cuff
         
200-367-1.3   1.3 mm Active Redirection Flow Cuff

200-367-1.6   1.6 mm Active Redirection Flow Cuff

200-367-2.0   2.0 mm Active Redirection Flow Cuff            
                                                             
200-367-2.4   2.4 mm Active Redirection Flow Cuff            
                                                             
200-367-2.8   2.8 mm Active Redirection Flow Cuff            
                                                             
200-367-3.2   3.2 mm Active Redirection Flow Cuff            
                                                             
200-367-3.6   3.6 mm Active Redirection Flow Cuff            
                                             
200-367-4.0   4.0 mm Active Redirection Flow Cuff            
                                                             
200-367-5.0   5.0 mm Active Redirection Flow Cuff            
                                                             
200-367-6.0   6.0 mm Active Redirection Flow Cuff            
                                                             
200-367-6.5   6.5 mm Active Redirection Flow Cuff

Updated March 28, 2006