• J Pain Symptom Manage · Dec 2021

    Efficacy of proportional sedation and deep sedation defined by sedation protocols: A multicenter, prospective, observational comparative study: Protocol-based palliative sedation.

    • Kengo Imai, Tatsuya Morita, Naosuke Yokomichi, Takashi Kawaguchi, Hiroyuki Kohara, Takashi Yamaguchi, Ayako Kikuchi, Takuya Odagiri, Yuki Sumazaki Watanabe, Rena Kamura, Isseki Maeda, Natsuki Kawashima, Satoko Ito, Mika Baba, Yosuke Matsuda, Kiyofumi Oya, Keisuke Kaneishi, Yusuke Hiratsuka, Akemi Shirado Naito, and Masanori Mori.
    • Seirei Hospice, Seirei Mikatahara General Hospital (K.I.), Hamamatsu, Japan. Electronic address: k.imai@sis.seirei.or.jp.
    • J Pain Symptom Manage. 2021 Dec 1; 62 (6): 1165-1174.

    PurposeTo investigate the efficacy of two types of palliative sedation: proportional and deep sedation, defined by sedation protocols.MethodsFrom a multicenter prospective observational study, we analyzed the data of those patients who received the continuous infusion of midazolam according to the sedation protocol. The primary endpoint was goal achievement at 4 hours: in proportional sedation, symptom relief (Integrated Palliative care Outcome Scale: IPOS ≤ 1) and absence of agitation (modified Richmond Agitation-Sedation Scale: RASS ≤ 0); in deep sedation, the achievement of deep sedation (RASS ≤ -4). Secondary endpoints included deep sedation as a result of proportional sedation, communication capacity (Communication Capacity Scale item 4 ≤ 2), IPOS and RASS scores, and adverse events.ResultsA total of 81 patients from 14 palliative care units were analyzed: proportional sedation (n = 64) and deep sedation (n = 17). At 4 hours, the goal was achieved in 77% (n = 49; 95% confidence interval: 66-87) with proportional sedation; and 88% (n = 15; 71-100) with deep sedation. Deep sedation was necessary in 45% of those who received proportional sedation. Communication capacity was maintained in 34% with proportional sedation and 10% with deep sedation. IPOS decreased from 3.5 to 0.9 with proportional sedation, and 3.5 to 0.4 with deep sedation; RASS decreased from +0.3 to -2.6, and +0.4 to -4.2, respectively. Fatal events related to the treatment occurred in 2% (n = 1) with proportional and none with deep sedation.ConclusionProportional sedation achieved satisfactory symptom relief while maintaining some patients' consciousness, and deep sedation achieved good symptom relief while the majority of patients lost consciousness.Copyright © 2021. Published by Elsevier Inc.

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