Pushing The Envelope: Deep Rebreather Diving Physiology and New CCR ResearchTim Blömeke presents some new research into the physiologyof deep rebreather divingPushing the Envelope in Deep Rebreather Diving PhysiologyPushing the envelope in deep rebreather diving isn’t just about exploring new and rarely visited dive sites; it’s also about breaking new ground in understanding the physiological effects of CCR dives.Two recent studies by hyperbaric researchers, among them DAN Europe’s own Costantino Balestra, are contributing to a small but growing trove of data. The Rise of Deep CCR Diving TechnologyNew manufacturers of rebreathers and electronic controllers have entered the market, CCR technology is maturing and becoming more reliable, and deep CCR dives are becoming more common. Human subjects and research ethicsConducting research into deep CCR diving has a number of challenges. “Deep CCR dives are not very common, and they tend to take place far away from university laboratories. Frequently Asked Questions (FAQs)Why is deep rebreather diving considered “pushing the envelope”?