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(1) Background: The perfusion index (PI) represents the ratio between pulsatile blood flow and non-pulsatile blood flow in the peripheral tissue. (2) We aimed to investigate the blood pressure perfusion of tissues and organs in ethnobotanical, synthetic cannabinoid and cannabis derivative consumers through the value of perfusion index. (3) Results: The patients enrolled were divided into two groups: group A, which included all patients who presented in the ED within the first three hours after consumption, and group B, which included those patients who presented more than three hours and up to 12 h after drug consumption. The average values of the PI in the case of group A/group B were 1.51 ± 1.07/4.55 ± 3.66. Statistically significant correlations in both groups were recorded between the drug intake ED admission, respiratory rate, peripheral blood oxygen saturation and tissue perfusion index (p < 0.001). The average value of the PI measured in group A was significantly lower compared to that measured in patients in group B. Therefore, we concluded that the perfusion of peripheral organs and tissues was lower in the first 3 h after drug administration. (4) Conclusions: PI plays an important role in the early detection of impaired organ perfusion and in monitoring tissue hypoxia. A decreased PI value may be an early indication of decreased perfusion organ damage.

s, Resuscitation 2011 – Implementation / Resuscitation 82S1 (2011) S1–S34 S17 their waveform, which in its turn can influence defibrillation thresholds (DT). The aim of the study was to compare DT in two different biphasic waveforms on high impedance porcine model. Methods: In 18 anesthetized pigs (33–60 kg) we evaluated energy of the TD (ETD) that would terminate electrically induced 20 sec VF. The quasi-sinusoidal pulse (BQS) has the amplitude of 2nd phase ∼50% from 1st one and durations 5.6 and 4.4 ms respectively. The BQS pulse was delivered by MSIEE experimental defibrillator and biphasic rectilinear pulses (BRL) – defibrillator ZOLL E Series. These defibrillators compensate high impedance by controlling current with fixed pulse duration (10 ms). The pulses shape corresponded to load resistance 100 ohms regardless of pig chest impedance (43–77 ohms). Results: ETD of BRL pulse in 11 from 18 pigs was 16 (8–26)% more, than BQS pulse, in 3 pigs 12 (9–13)% less than BQS pulse p