Doing both the medical examination and the office work at the same time means that the quality of both suffers.
ご質問ありがとうございます。
"Doing both the medical examination and the office work at the same time means"=「診察業務と事務作業を同時にするということは」
"that the quality of both suffers."=「どっちの質も落ちる。」
(又は、"that both end up half-finished"=「どっちも中途半端になってしまう」とも言えます。)
ご参考に。