Optimum Hand Position During Cardiopulmonary Resuscitation

Study Overview
=================
Brief Summary
-----------------
The almost evidences of the optimal hand position during compression had been based on chest computed tomography (CT) or chest plain films of patients for investigating the effective location for compressing the left ventricle of the heart during cardiopulmonary resuscitation (CPR). However every study was conducted at full inspired state of respiration. A prospective cohort study to evaluate the proper hand position during CPR based on expired respiratory state CT as the health screening would be needed.

Official Title
-----------------
Optimum Hand Position During Cardiopulmonary Resuscitation: Comparing Expiration and Inspiration View of the Scout Film of the Low Dose Chest Computed Tomography

Conditions
-----------------
Cardiopulmonary Resuscitation, Hand Position

Intervention / Treatment
-----------------
* Radiation: low dose chest computed tomography


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: over 18 years of age no history of heart or lung disease no history of chest or abdominal surgery Exclusion Criteria: abnormal findings in LDCT, which might influence inspiration or expiration, were excluded after image interpretation by the board certified radiologists

Ages Eligible for Study
-----------------
Minimum Age: 19 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Chest computed tomography<br>Low dose chest computed tomography during expiration and inspiration | Radiation: low dose chest computed tomography<br>* All participants were evaluated 2 scout films during LDCT screenings. The first scout film was obtained while a participant was holding a comfortable expiration with the arms at down position, and the second scout film was obtained while a full inspiration with the arms at raised position. The axial images of LDCT were taken during participants' full inspiration. The radio-opaque marker was attached to the participants' skin where the lowest part of sternum was palpable, because the sternum moves according to the position of arms and respiration.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| proper hand position during CPR using the scout film of low dose chest computed tomography | proper hand position during CPR based on comparison between expiration with the arms at down position and inspiration the arms at raised position. Measurement will be assessed with a length of xiphoid process to arbitrary center of heart | five months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| predicted compressed organs in CPR using the scout film of low dose chest computed tomography Measurement will be assessed with scout film silhouette of organs under quarterly divided sternum. |  | five months |