Ventilator Add-On for Delivering PET Tracer Gases

Journal of Nuclear Medicine Technology

Mika I.P. Teräs¹  Harry Scheinin¹  Kaike K. Kaisti¹  Hannu T. Sipilä¹  Jukka Mäkitalo¹ 

关键词: PET;    tracer;    bolus;    inhalation;    ventilator;   

DOI  :  

学科分类：医学（综合）

来源: Society of Nuclear Medicine

【 摘 要 】

Objectives: The increasing use of PET for assessing cerebral blood flow, oxygen metabolism, and blood volume in critically ill patients has created a need for reliable technical solutions for delivering 15O-tracer gases to mechanically ventilated subjects. Our objective was to create such a solution.Methods: We designed a ventilator add-on unit that enables complex functional brain studies using labeled oxygen and carbon monoxide gases as tracers. The unit manages both steady-state and bolus inhalations, and the latter can be manually initiated using a remote trigger. All parts conducting breathing gases can be sterilized. The unit can be operated during both spontaneous pressure support breathing and volume-controlled ventilation. It supports the standard safety features and alarms of the ventilator and includes an overflow valve in the bolus reservoir.Results: The count rate curves obtained using the new unit were similar to those from the standard bag-inhalation method.Conclusion: The unit we describe offers an economical and easily operated solution for providing uninterrupted ventilator treatment while performing PET brain studies, and the provided treatment meets intensive care criteria.

【 授权许可】

Unknown