1. Plaintiff (Counterclaim Defendant) A and B jointly and severally liable for 20,208,010 won to the Defendant (Counterclaim Plaintiff) and their related thereto.

A principal lawsuit and a counterclaim shall be deemed simultaneously.

1. Basic facts

A. The relationship between the parties 1) The Plaintiff A is a G Hospital located in Yongsan-gu Seoul Metropolitan Government F (hereinafter “Defendant Hospital”).

(2) The Defendant is a school juristic person that establishes and operates the Defendant hospital, and is an employer who employs medical professionals working in the Defendant hospital. The Plaintiff B is the spouse of the Plaintiff, and the Plaintiff C and D are children of the Plaintiff.

B. The Plaintiff A’s traffic accident occurred and the Defendant Hospital’s surgery 1) Plaintiff A complained of the pain pain from traffic accidents that occurred at around 17:50 on June 25, 2014, and applied to the emergency department of the Defendant Hospital at around 19:4. At the time, Plaintiff A’s food condition was clear and respiratory was normal, and the Defendant Hospital’s medical staff showed normal opinion except for the part of abundance. 2) The Defendant Hospital started to perform the chest radiation examination against Plaintiff A at around 19:54, and performed the bundry CT examination. There was no abnormal opinion on the bundine and heart, but on the 21:30,000, after confirming the blood transfusion from the 21:30,000, the 21:00,000, and on the 20,000, the Defendant Hospital started to perform the surgery on the 216th, 2016.

다. 원고 A의 수술 이후 경과 및 급성 호흡곤란증후군 발생 1) 2014. 6. 26.경 원고 A의 의식 상태는 통증의 정도를 명확하게 표현할 정도로 명료하였고 호흡음도 정상이었다. 수술 직후인 2014. 6. 26. 02:04경 동맥혈가스분석검사 결과 산소포화도는 92.7%이고 동맥혈산소분압(PaO₂, 정상 범위 84mmHg~98mmHg, 이하 단위 생략) 동맥혈에 있는 산소의 압력 은 72.5로서 저산소증을 보였으나, 비강캐뉼라 산소흡입방법의 하나로서 캐뉼라(cannula 라는 튜브를 통해 산소를 주입하는...