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
An isolated shower is possible in the south later in the day
The family of an elderly woman from Swansea have been trying to sell her house to pay for her care.
Welshman Nathan Cleverly will face Tony Bellew in Liverpool on the 22nd of November. It's three years since their last fight