ED Diagnostic - RigiScan Plus

The RigiScan® Plus rigidity assessment system is an ambulatory diagnostic tool used to measure the frequency, rigidity and duration of both nocturnal and provocative erections.

More details

The RigiScan® Plus rigidity assessment system is an ambulatory diagnostic tool used to measure the frequency, rigidity and duration of both nocturnal and provocative erections.

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Testing may be conducted In a stand-alone ambulatory mode or in a real-time monitoring mode when connected to computer. This device provides a graphical and tabular display of base and tip penile rigidity and tumescence data for the physician's interpretation.

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It is a non-threatening, non-invasive, cost-effective method for a physician to differentiate between organic and psychological erectile dysfunction and support the treatment program of choice.

 Rigidity Assessment System 

Principles of Operation

The RigiScan® Plus Monitor is an ambulatory data logging unit that measures and records penile rigidity and tumescence. It is linked by cable to an IBM-compatible computer, which downloads and processes the data, stores it for review, and prints it on command. The ambulatory monitor uses tip and base penile loops that adjust by tightening slightly at discrete time intervals to measure and record penile rigidity and tumescence. Each loop contains a cable that moves freely inside a conduit. Each loop takes a measurement every 15 seconds. The loop gently tightens with a linear force of 4 ounces (114g) and then immediately releases and the tissue rebounds to its unloaded state. 

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The RigiScan® Plus Monitor then takes a tumescence measurement. After the tumescence measurement is taken, it is compared to the previous samples. When a 6 mm increase in tumescence is detected, representing possible erectile activity, the RigiScan® Plus Monitor takes a second measurement every 30 seconds. After tumescence is measured, the loops tighten a second time around the circumference of the penis with a linear force of 10 ounces (283.5g). The RigiScan® Plus Monitor takes a measurement when this force is applied to record a cross sectional response to radial compression. This is how rigidity is measured.

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Real-time Monitoring 

One of the options on the RigiScan® Contents screen is RTM (Real-time Monitoring). Real-time Monitoring is useful for collecting rigidity and tumescence data for immediate analysis, which can be done in the privacy of your office or the sleep laboratory. At the same time the RigiScan® Plus Monitor is storing the patient’s data, you can view it on your computer screen. Real-time Monitoring can be performed in the Provocative or Nocturnal mode. If you select the provocative method of testing during initialization, and then click RTM, the Provocative Real-time Mode Graphs screen will open.

Graphs

Mode Graphs Display 

Base rigidity and tip rigidity are expressed on the left margin of the graph as percentages ranging from 0% to 100%. Base tumescence and tip tumescence are expressed in centimeters, ranging from 5 cm to 15 cm, to measure the circumference of the penis. As the RigiScan® Plus Monitor collects data, the current value is updated on the right margin of the graph. Place the RigiScan® Plus Monitor Loops on the patient’s penis before you click RTM

Modes

Nocturnal & Provocative Collection Modes 

Estimating an appropriate baseline for penile circumference is an important parameter in the processing of rigidity and tumescence data by the RigiScan® Plus System Software. There are two different modes of data collection: Nocturnal and Provocative. Each method processes data differently in order to establish an accurate estimate of the baseline penile circumference, so it is important to select the appropriate mode during initialization before you begin testing the patient

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Nocturnal Testing

You should use the Nocturnal Testing mode when you want to monitor nocturnal erections over a period of several hours. This test method can be used while the patient is at home or in a sleep laboratory setting, and also can be used under Ambulatory or Real-time settings. The Nocturnal Mode is used when there are multiple erectile events and there is a periodic return to the flaccid state. This uses the entire session to calculate thebaseline.

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Provocative Testing

Provocative Testing is performed when the clinician wants to use an intervention to produce a one-time erectile response. This method of testing is performed over a shorter period of time, usually in an office setting. Intervention might include the injection of a pharmacological agent or visual sexual stimuli. This test method can also be used under either Ambulatory or Realtime settings. In the Provocative Mode, the RigiScan® Plus System records a baseline penile tumescence during the first fifteen minutes of testing and stores it for later reference. If you are testing in the Real-time mode, the message CALCULATING BASELINE will flash at the bottom of the screen while the baseline tumescence is being established. Only when the message BASELINE ESTABLISHED appears on the screen indicating the baseline tumescence is calculated and stored may intervention be given to the patient. If you are testing in the ambulatory mode, monitoring must be performed for a period of fifteen minutes to establish a baseline value before intervention is given to the patient.

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