Post Occlusive Reactive Hyperaemia (PORH)

The increase in microvascular blood flow following arterial occlusion, Post Occlusive Reactive Hyperaemia (PORH), can be assessed using the non-invasive laser Doppler technique. Following release of the arterial occlusion there is a marked transient increase in microvascular blood flow to the ischaemic tissues.

Laser Doppler derived PORH measurements have been shown to be highly reproducible (Yvonne-Tee et al, 2005). The mechanisms behind PORH are believed to be a combination of: myogenic relaxation of the vessels (Patterson, 1956), release of local mediators and metabolites from the ischaemic tissue (Kontos et al, 1965) and more recently the involvement of sensory nerves (Minson & Lorenzo, 2007). As a result of unknown mechanisms behind PORH there is extensive research in this area. Previous studies have shown the PORH response to ischaemia shows distinct patterns that are associated with cardiovascular risk i.e. area under curve (AUC) and peak flux following the period of ischaemia (Strain et al, 2005. Yamamoto-Suganuma et al, 2009).

The moorVMS-VASC system enables rapid, reproducible and user-friendly measurement of PORH. The user friendly PC software enables protocols to be written which exactly match user requirements for individual experimental conditions – whilst allowing your institution to create, save and repeat an assessment specifically designed for your institution easily enabling a reproducible method to be performed.

Рекомендации по оборудованию

We recommend the moorVMS-VASC PC software to streamline the measurement and analysis together with a single or dual channel moorVMS-LDF monitor and multi-fibre skin probes (VP1T/7). The CUFF-Arm (or CUFF — Arm RD) can be used on the ankle and forearm, although a full range is available to accommodate a range of limb sizes. The moorVMS-PRES provides automation of the cuff inflation / deflation protocol.

Система сосудистого мониторинга

Неинвазивная оценка изменений микрососудистого кровотока в ответ на стандартные и задаваемые пользователем протоколы воздействия сдавливающей манжетой


moorVMS-VASC - Неинвазивная оценка изменений микрососудистого кровотока в ответ на стандартные и задаваемые пользователем протоколы воздействия сдавливающей манжетой
moorVMS-LDF - Усовершенствованный мониторинг кровотока с помощью лазерного допплера и мониторинг температуры
moorVMS-PRES - Automatic pressure cuff control for routine microvascular testing
VP1T/7 - Комбинированный температурный и оптический зонд, который подает световое излучение под прямым углом к кабелю зонда, с 8-ю «собирающими» волокнами.
CUFF-ARM - Arm Pressure Cuff (Adult) with airline and quick fit connector.
CUFF-ARM-RD - Rapid deflation arm pressure cuff with airline and quick fit connector

Что дальше?

Contact us to discuss your specific needs and to request your copy of our free Application Note which includes a detailed experimental method and practical suggestions. We also offer no obligation on-site visits so you can test the equipment in your facility.


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Potier L., Abi Khalil C., Mohammedi K., Roussel R. 2011.
Use and Utility of Ankle Brachial Index in Patients with Diabetes. Review Article.
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