For treatment of tongue-based obstructive sleep apnea
ImThera Medical has reported the successful implantation of it’s aura6000 neurostimulation device in the first two patients for treating tongue-based obstructive sleep apnea (OSA). Patients are being enrolled in ImThera’s pilot clinical investigation in Belgium with the first results expected to be published in the first half of 2010.
The patients were implanted with the aura6000, during which the hypoglossal nerve was briefly stimulated to verify system and nerve integrity. One week post- surgery, the patients underwent an in-laboratory Polysomnography (PSG) titration process during which stimulation parameters were determined in order to maintain proper tongue position and to provide an open airway during sleep.
The physicians observed substantial improvement in upper airway opening and flow measured by normal sleep and a reduced AHI during the post surgery PSG.
Dr Terence Davidson, chief medical officer of ImThera, was impressed with the ease of the surgery and the performance of the aura6000 components. “It is rare that an initial clinical trial proceeds so well and with such an impressive start.”
The aura6000 is based on ImThera’s Targeted Hypoglossal Neurostimulation (THN) Sleep Therapy, delivering neurostimulation to the tongue during sleep.
Dr Philippe Rombaux, head of otolaryngology surgery at the Universite Catholique de Louvain, Belgium, said: “The surgical procedures went smoothly, taking approximately 90 minutes to complete. There were no surgical complications. Minor surgical issues were quickly resolved. At one week, patients were not disturbed by the implanted stimulator, lead or electrode.”
Daniel Rodenstein, professor of the Universite Catholique de Louvain, Belgium, and principal investigator of the European study, said: “Speech, swallowing and tongue sensibility were not disturbed by surgery. Stimulation resulted in effective and painless tongue movement during wakefulness.
“During sleep, stimulation at sufficient levels was not perceived by the patients and did not interrupt sleep. Although this was not at all an outcome planned for the analysis at one week after surgery, sleep apnea severity was improved during electrical stimulation. Clinical benefit can only be appreciated in the future, therefore we are looking forward to the results of this pilot study.”
Marcelo Lima, chairman, president and CEO of ImThera Medical, said: “ImThera’s mission is to provide a safe and effective alternative for OSA patients that will not or cannot comply with CPAP.
“With a simple implant procedure, patients are expected to sleep better, without obstructive apnea events, which will ultimately help them achieve a better quality of life, while reducing the effects of the many serious comorbid consequences of OSA. We are very pleased with the first successful implantations and we look forward to the early results from these trials.”