Hundreds of deaths in Wales annually could have been avoided established guidelines were followed to prevent blood clots, according to the Assembly's Health and Social Care Committee.
The Welsh Government says it welcomes the report and will consider its recommendations carefully.
"This is a substantial problem in relation to its scale" says the committee's chair Mark Drakeford AM.
"But it's a manageable problem. It's a problem that things can be done about, practical things, things that can be done today and are within the ability of the NHS to do".
More top news
Not a promising start to the week with a Met Office yellow warning of heavy and persistent rain.
There'll be bracing winds and heavy showers this afternoon and expect a wet and windy start on Monday morning.
Carl Edwards and guests look back at the week's events in the latest edition of Newsweek Wales.