臨床研究等提出・公開システム

Date of registration	May. 01, 2026
Last modified on	May. 01, 2026
Trial ID	jRCT1030260106

Scientific Title	Characteristics of patients who did not wish to be resuscitated but were called for emergency medical assistance during cardiac arrest, and their association with the local healthcare system: A prospective observational study.
Public Title	Investigation of patients who called for emergency services after cardiac arrest but did not wish to receive cardiopulmonary resuscitation (CPR).

Contact for Scientific Queries	Name	Yoshiaki Inoue
	Affiliation	University of Tsukuba Hospital
	Address	2-1-1, Amakubo, Tsukuba, Ibaraki
	Telephone	+81-29-853-3900
	E-mail	yinoue@md.tsukuba.ac.jp
Contact for Public Queries	Name	Ayaka Sakamoto
	Affiliation	University of Tsukuba
	Address	2-1-1, Tsukuba, Amakubo, Ibaraki
	Telephone	+81-29-853-3900
	E-mail	ayaka.furukawa@md.tsukuba.ac.jp

Recruitment status	Recruiting

Anticipated date of first enrollment		May. 01, 2026
Target sample size		2500
Study Type		Observational
Study Design	allocation	single arm study
	masking	open(masking not used)
	control	uncontrolled control
	assignment	single assignment
	purpose	health services research
Key inclusion & exclusion criteria	Inclusion Criteria	All of the following conditions must be met: i) The injured or ill person is in Ibaraki Prefecture and an emergency call has been made. ii) The person is in cardiac arrest upon arrival of the ambulance crew at the scene. iii) The person is 18 years of age or older.
	Exclusion Criteria	When there is no one on site who can make decisions regarding how to respond to a patient's sudden change in condition.
	Age Minimum	18age old exceed
	Age Maximum	No limit
	Gender	Both
Health Condition(s) or Problem(s) Studied		Cardiopulmonary arrest
Health Condition(s) Keyword		CPA, Cardiopulmonary arrest
Health Condition(s) Code		Heart Arrest
Primary Outcome(s)		Percentage of Do Not Attempt Resuscitation (DNAR) cases among emergency calls for total cardiac arrest.
Secondary Outcome(s)		Detailed Information Regarding DNAR Cases - Percentage of individuals who discussed DNAR (multiple individuals allowed: patient, family, doctor, facility staff, etc.) - Percentage of individuals who expressed their intention to DNAR in writing - Percentage of individuals who had predetermined procedures for responding to cardiac arrest - Details of the procedures for responding to cardiac arrest (e.g., emergency call, contact with attending physician, contact with visiting nurse, contact with care manager, etc.) - Reason for emergency call - Type of current outpatient medical institution - Presence or absence of home medical care intervention - Recognition of cardiac arrest at the time of notification Relationship with the regional medical system - Relationship between the number of medical institutions in the secondary medical area (by type, per capita) and the percentage of DNAR cases

Primary Sponsor	None

Secondary Sponsor

Source of Monetary Support	KAKEN
Secondary Sponsor	Not applicable

Name of Certified Review Board	Ethical Committee, University of Tsukuba Hospital
Address	2-1-1, Amakubo, Tsukuba, Ibaraki, Ibaraki
Telephone	+81-29-853-3900
E-Mail	rinshokenkyu@un.tsukuba.ac.jp
Approval Status	Approval
Date of approval	Mar. 23, 2026

Plan to share IPD	No

Countries of Recruitment（Except Japan）	None