CATCH小児頭部CTルール
用途適応: children with minor head injury (GCS 13–15) plus LOC, amnesia, disorientation, vomiting, or irritability …
層別High-risk targets neurosurgical intervention; medium-risk targets CT-visible brain injury. Rule-negative is l…
限界非適応: obvious major trauma, GCS ≤12, or pathways that mandate PECARN/N… · 落とし穴: applying CATCH to trivial bumps without derivation entry featur… · Local imaging capacity and radiation stewardship matter.
出典Osmond MH, et al. CMAJ 2010 (CATCH)
当直の次の一手
スコア後:シーン連算・隣接スコア・対応パスへ。ローカル参照のみ、HIS書き込みなし。
方法論 · 代入例・ガイドライン要点・詳細
適用場面
適応: children with minor head injury (GCS 13–15) plus LOC, amnesia, disorientation, vomiting, or irritability — as in derivation.
入力項目
- High: GCS < 15 at 2 h after injury · 選択
- High: Suspected open or depressed skull fracture · 選択
- High: History of worsening headache · 選択
- High: Irritability on examination · 選択
- Medium: Any sign of basal skull fracture · 選択
- Medium: Large boggy scalp hematoma · 選択
- Medium: Dangerous mechanism (MVC; fall ≥3 ft / 5 stairs; fall from bicycle without helmet) · 選択
- CATCH2 add-on: ≥ 4 discrete vomiting episodes · 選択
計算方法と公式
High (any → CT): GCS <15 at 2 h; suspected open/depressed skull fx; worsening headache; irritability. Medium (CT vs observe): basal skull-fx signs; large boggy scalp hematoma; dangerous mechanism; CATCH2 adds ≥4 vomits.
Score at bedside; any high-risk factor favors CT. Medium-risk: shared decision CT vs observation. Document safeguarding.
計算例(数値代入)
以下の数値は本ツールの入力欄に定義された例示値であり、本ページの数式でサーバー側で実際に計算したものです。計算過程を素早く確認できます。代入方法の例示のみで、臨床上の助言ではなく、実在する症例でもありません。
| High: GCS < 15 at 2 h after injury | No (0) |
|---|---|
| High: Suspected open or depressed skull fracture | No (0) |
| High: History of worsening headache | No (0) |
| High: Irritability on examination | No (0) |
| Medium: Any sign of basal skull fracture | No (0) |
| Medium: Large boggy scalp hematoma | No (0) |
| Medium: Dangerous mechanism (MVC; fall ≥3 ft / 5 stairs; fall from bicycle without helmet) | No (0) |
| CATCH2 add-on: ≥ 4 discrete vomiting episodes | No (0) |
→CATCHRule-negative — low risk
- High-risk hits:0
- Medium-risk hits:0
| High: GCS < 15 at 2 h after injury | Yes — high risk |
|---|---|
| High: Suspected open or depressed skull fracture | Yes — high risk |
| High: History of worsening headache | Yes — high risk |
| High: Irritability on examination | Yes — high risk |
| Medium: Any sign of basal skull fracture | Yes — medium risk |
| Medium: Large boggy scalp hematoma | Yes — medium risk |
| Medium: Dangerous mechanism (MVC; fall ≥3 ft / 5 stairs; fall from bicycle without helmet) | Yes — medium risk |
| CATCH2 add-on: ≥ 4 discrete vomiting episodes | Yes — CATCH2 medium |
→CATCHHigh risk — CT recommended
- High-risk hits:4
- Medium-risk hits:4
- CATCH2 vomit≥4:Yes
結果の判読と層別
High-risk targets neurosurgical intervention; medium-risk targets CT-visible brain injury. Rule-negative is low risk but not zero — give observation advice.
ガイドライン要点(独自整理)
- 4 high + 3 medium (+ CATCH2 vomit≥4).
- Any high → CT.
- 次: PECARN / CHALICE / neurosurgery.
以上は該当ガイドラインの要点を本サイトが独自に整理したものであり、原文の引用ではありません。
注意点と限界
- 非適応: obvious major trauma, GCS ≤12, or pathways that mandate PECARN/NICE instead.
- 落とし穴: applying CATCH to trivial bumps without derivation entry features.
- Local imaging capacity and radiation stewardship matter.
照合と出典 · 検証可能なガバナンス
参考ガイドラインと出典
- Osmond MH, et al. CMAJ 2010 (CATCH) · 出典 ↗
- CATCH2 refinement CMAJ 2018 (adds ≥4 vomits)
ガイドライン全文の著作権は各学会・出版社に帰属します。 · データセット整理日 2026-10-08
よくある質問
よくある質問
- CATCH小児頭部CTルールは患者データをアップロードしますか?どこで計算しますか?
- 計算はブラウザ内でローカルに行われ、入力と結果はサーバーに送信されません。免許を有する医師向けであり、病歴・検査・施設プロトコルと合わせて解釈すること。診断や処方の代替ではありません。
- CATCH小児頭部CTルールは実際にどう計算しますか?計算例を示せますか?
- 代入値: High: GCS < 15 at 2 h after injury No (0)、High: Suspected open or depressed skull fracture No (0)、High: History of worsening headache No (0)、High: Irritability on examination No (0)、Medium: Any sign of basal skull fracture No (0)、Medium: Large boggy scalp hematoma No (0)、Medium: Dangerous mechanism (MVC; fall ≥3 ft / 5 stairs; fall from bicycle without helmet) No (0)、CATCH2 add-on: ≥ 4 discrete vomiting episodes No (0) → 結果: CATCH Rule-negative — low risk(High-risk hits: 0、Medium-risk hits: 0) 代入値: High: GCS < 15 at 2 h after injury Yes — high risk、High: Suspected open or depressed skull fracture Yes — high risk、High: History of worsening headache Yes — high risk、High: Irritability on examination Yes — high risk、Medium: Any sign of basal skull fracture Yes — medium risk、Medium: Large boggy scalp hematoma Yes — medium risk、Medium: Dangerous mechanism (MVC; fall ≥3 ft / 5 stairs; fall from bicycle without helmet) Yes — medium risk、CATCH2 add-on: ≥ 4 discrete vomiting episodes Yes — CATCH2 medium → 結果: CATCH High risk — CT recommended(High-risk hits: 4、Medium-risk hits: 4、CATCH2 vomit≥4: Yes)
照合手順
照合と根拠
本ツールの数式と計算方法は本ページに明示しており、公開のうえ逐一照合できます。数式・係数・閾値は上記の権威ある情報源に基づき照合しています。 臨床ツール一覧 →