bringing venous hemodynamic testing to you. understanding venous physiology pneumatic venous...
TRANSCRIPT
Bringing venous hemodynamic testing to you.
Understanding venous physiology
Pneumatic Venous PlethysmographyPneumatic Venous Plethysmography
ObstructionObstruction IncompetenceIncompetence FunctionFunction
Bilateral venous physiological studyObstruction, Incompetence, Exercise
in less than 5-10 minutes
Bilateral venous physiological studyObstruction, Incompetence, Exercise
in less than 5-10 minutes
VenView System VenView System AdvantagesAdvantages
VenView System VenView System AdvantagesAdvantages
• Comprehensive plethysmographic evaluation for venous obstruction, incompetence, and calf ejection fraction.
• Complete bilateral evaluation time < 20 minutes.– 5 minutes explanation and pre-test set-up,– 5-10 minutes for bilateral obstruction, incompetence, and calf ejection studies
collectively,– 5 minute post test removal and print report
• Once patient and cuffs are positioned- the testing is “Hands-Off”, simply follow computer prompts.
• Detailed hemodynamic values, tracings, and graphs are displayed on two page report.
• Examination chair can also be configured as bed.• Unobstructed access to the popliteal area.
About VenViewAbout VenViewAbout VenViewAbout VenView
• VenView is a non-invasive pneumatic venous plethysmography device.• The VenView system provides accurate quantitative studies due to a flow meter that measures air placed inside
sensing cuff. • With a limb circumference measurement and automated measured sensing cuff volumes, the VenView system is able
to calculate volume/pressure relationships. • Volume measurements are reported as ml/100ml (individual leg volume correction)
IndicationsIndicationsIndicationsIndications
• Venous disease such as venous thrombosis, venous incompetence (deep, superficial, perforator) and poor venous calf ejection fraction may present as varicose veins, edema, stasis, and ulceration of the lower extremities.
• Deep venous thrombosis: outflow study• Venous incompetence: dependent refill study• Venous calf ejection fraction: exercise refill study
VenView specifically addresses each parameter of venous disease:
• Deep venous thrombosis: outflow study• Venous incompetence: dependent refill study• Venous calf ejection fraction: exercise refill study
VenView specifically addresses each parameter of venous disease:
OutflowOutflow Dependent RefillDependent Refill Exercise FunctionExercise Function
Sensing cuffs
Sensing cuffs are inflated with air to 6 – 7 mmHg
The amount of air is measured as it inflates the cuff which
provides a pressure/volume relationship to base calculations
Method: Sensing cuff Method: Sensing cuff inflationinflation
Method: Sensing cuff Method: Sensing cuff inflationinflation
60 mmHg
(looking for limited outflow / obstruction)
Outflow- phase Outflow- phase oneone
Outflow- phase Outflow- phase oneone
baselinecuff volume
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60 mmHg Release
MaxV V
ExV V
Expelled V VMax V V
> 77%
Normal Outflow
4 sec
Outflow- phase Outflow- phase twotwo
Outflow- phase Outflow- phase twotwo
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60 mmHg Release
MaxV V
ExV V
Expelled V VMax V V
< 77%
Abnormal Outflow
4 sec
Normal Outflow
> 77%
Outflow- phase Outflow- phase twotwo
Outflow- phase Outflow- phase twotwo
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Normal
Abnormal
Refill Rate < 5.0
Refill Rate > 5.0
(ml / 100ml / min)
DependeDependent nt
RefillingRefilling
DependeDependent nt
RefillingRefilling
Patient is quickly tipped upright…
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NormalNormal
AbnormalAbnormal
Exercise- Exercise- ankle ankle flexesflexes
Exercise- Exercise- ankle ankle flexesflexes
10 ankle flexes
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• Two page report
• Contains values, plethysmographic tracing, and summary graph for all three studies
– Outflow– Dependent venous filling– Exercise refilling
Summary Summary ReportReport
Summary Summary ReportReport
• Individual detailed report page that contains values, plethysmography tracing, and summary graph for all three studies
– Outflow– Dependent venous filling– Exercise refilling
OutflowOutflow Dependent FillingDependent Filling ExerciseExercise
Individual Individual Detailed Detailed ReportsReports
Individual Individual Detailed Detailed ReportsReports
• Entire study tracing that contains:– Outflow– dependent refill– Exercise refilling
• Printable in color and black and white
Full Full TracinTracin
gg
Full Full TracinTracin
gg
Normal StudyNormal Study Abnormal StudyAbnormal Study
• Examination chair can also be configured as bed.
• Unobstructed access to the popliteal area for examination or duplex scanning.
Additional Chair Additional Chair FeaturesFeatures
Additional Chair Additional Chair FeaturesFeatures
ObstructionObstruction IncompetenceIncompetence FunctionFunction
Bilateral venous physiological studyObstruction, Incompetence, Exercise
in less than 5-10 minutes
Bilateral venous physiological studyObstruction, Incompetence, Exercise
in less than 5-10 minutes
Your venous hemodynamic studies