PROBLEM TO BE SOLVED: To determine a type of during-night hypoxemia.SOLUTION: A type determination device 100 comprises: an oxygen saturation information acquisition part 110 for acquiring oxygen saturation information being information related to chronological change of arterial oxygen saturation; a conversion part 120 for frequency converting oxygen saturation information in a first period; a power extraction part 130 for extracting power in a prescribed frequency range; a period calculation part 140 for calculating an excess period which is a total sum of a period in which, the power extracted in a second period longer than the first period exceeds a first threshold; a determination part 150 for determining that, if the excess period is equal to or greater than a second threshold, a type is an intermittent type; and a notification part 160 for notifying a user of the determination result.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】夜間低酸素血症の類型を判定する。【解決手段】動脈血酸素飽和度の経時的変化に関する情報である酸素飽和度情報を取得する酸素飽和度情報取得部110と、第一期間内の酸素飽和度情報を周波数変換する変換部120と、所定の周波数範囲内におけるパワーを抽出するパワー抽出部130と、第一期間より長い第二期間において抽出されたパワーが第一閾値を超える時間の合計である超過期間を算出する時間算出部140と、超過期間が第二閾値以上の場合、間欠型の類型であると判定する判定部150と、判定結果を報知する報知部160とを備える類型判別装置100。【選択図】図1