The scent-diffusing ventilator for rehabilitation of olfactory function after laryngectomy

Abstract

Background The larynx bypass (LB) is the only device capable of providing laryngectomy patients with the ability to smell. Our findings regarding one-time and long-term use did reveal an improved olfactory function in these patients. Because the LB is difficult to use, however, it is not appropriate for everyday use. Therefore, we devised a new instrument: the scent-diffusing ventilator (SV). Methods Between January 2006 and February 2007, we researched the olfactory function of 16 patients who had undergone a laryngectomy (13 men/3 women; median age, 63 years) by using the LB and the SV. Their olfactory function was measured with the Sniffin’ Sticks test battery. Further practicability of both methods was determined through a visual analog scale (1–10). Results The patients’ olfactory function significantly improved (SV median 8 versus LB median 7; p < 0.002). In addition, the SV was much easier to use than the LB (median, 6 versus 5; p < 0.001). Conclusion Further technical improvements are necessary to make the SV an established part of the rehabilitation of the olfactory function after laryngectomy.