Anesthesia Management of Precise Radiotherapy with Apnea MethodAuthor(s): Shilong Zhang, Bin Zhao, Dongji Chen, Ying Qi, Youguo Ma, Juan Ma, Wenjuan Xie, Haiyan Guo
Objective: To study the implementation of precise radiotherapy with apnea method and its effect on oxygen supply, blood pressure and heart rate, and to explore the safety and feasibility of precise radiotherapy with apnea method.
Methods: Two lung tumor patients received precise radiotherapy with apnea method, and 11 times of apnea positioning and treatment were carried out. The changes in blood oxygen saturation, blood pressure, heart rate, and end-expiratory carbon dioxide during the apnea period were observed, and the incidence ratio of adverse reactions was recorded.
Results: The mean apnea time of the two patients was 6.2 min, ranging from 3min to 9min; the mean radiotherapy time was 4.6 min, ranging from 1 min to 7 min; the change of SpO2 was less than 1%, with the lowest SpO2 of 97%; the mean increase of ETCO2 during apnea period was 3.5 mmHg, with the highest ETCO2 concentration of 59 mmHg, which occurred at the 8th minute in apnea; the mean anesthesia time was 53.5 min, ranging from 47 min to 60 min; the mean recovery time was 33.1 min, ranging from 30 min to 40 min. During the apnea period, the heart rate increased and the average arterial blood pressure increased. After the first time of apnea, there were blood blisters on the posterior pharyngeal wall of the patients, and no other adverse events or side effects occurred.
Conclusion: Precise radiotherapy with apnea is safe and feasible, which has high precision and advantages in the field of radiotherapy.