A device, comprising: - an occlusive element (OC) configured to be applied onto a proximal portion of a human limb to apply an occlusion pressure thereto, - a dilation sensing element (VS) configured to be applied onto a distal portion of a human limb to sense an extent of dilation thereof, - a control circuit coupled to the occlusive element (OC) and the dilation sensing element (VS), the control circuit configured to: - i) control the occlusive element (OC) to apply at least one sub-diastolic occlusion pressure (P oc ) and maintain said at least one sub-diastolic occlusion pressure (P oc ) for a certain occlusion interval (TP oc ), - ii) obtain (108; 108a, 108b) from the dilation sensing element (VS) a sensing signal, - iii) perform a check of said sensing signal for a certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P oc ) being removed after said occlusion interval (TP oc ), - iv) issue, as a result of said check indicating said certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P OC ) being removed after said occlusion interval (TP OC ), a signal indicating a venous pressure in said human limb which is lower than said at least one sub-diastolic occlusion pressure applied (P oc ). - an occlusive element (OC) configured to be applied onto a proximal portion of a human limb to apply an occlusion pressure thereto, - a dilation sensing element (VS) configured to be applied onto a distal portion of a human limb to sense an extent of dilation thereof, - a control circuit coupled to the occlusive element (OC) and the dilation sensing element (VS), the control circuit configured to: - i) control the occlusive element (OC) to apply at least one sub-diastolic occlusion pressure (P oc ) and maintain said at least one sub-diastolic occlusion pressure (P oc ) for a certain occlusion interval (TP oc ), - ii) obtain (108; 108a, 108b) from the dilation sensing element (VS) a sensing signal, - iii) perform a check of said sensing signal for a certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P oc ) being removed after said occlusion interval (TP oc ), - iv) issue, as a result of said check indicating said certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P OC ) being removed after said occlusion interval (TP OC ), a signal indicating a venous pressure in said human limb which is lower than said at least one sub-diastolic occlusion pressure applied (P oc ). - i) control the occlusive element (OC) to apply at least one sub-diastolic occlusion pressure (P oc ) and maintain said at least one sub-diastolic occlusion pressure (P oc ) for a certain occlusion interval (TP oc ), - ii) obtain (108; 108a, 108b) from the dilation sensing element (VS) a sensing signal, - iii) perform a check of said sensing signal for a certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P oc ) being removed after said occlusion interval (TP oc ), - iv) issue, as a result of said check indicating said certain variation of the dilation of said distal portion of a human limb resulting from said at least one sub-diastolic occlusion pressure (P OC ) being removed after said occlusion interval (TP OC ), a signal indicating a venous pressure in said human limb which is lower than said at least one sub-diastolic occlusion pressure applied (P oc ). <EOS>