I'd like some more info on these products if you can find them pls. As well as whether they've been approved by organizations like the FDA and the Cdn equivalent. Doctors usually avoid un-approved treatments unless there's no other medical alternative.

edit: I've found 3 products that act as you describe. Hemopure, Oxygent and PolyHeme, all of which are described as "oxygen therapeutics" aka fluids that behave like hemoglobin.

Hemopure is still in clinical trials inside the US, although due to FDA concerns, human trials were suspended, they are back to animal testing. The US Navy is partnering with Biopure to address the health concerns the FDA had. It has been approved by South Africa since 2001.

Oxygent has not been approved by the FDA (there are lingering concerns about the health effects of perfluorochemicals... namely that they cause cancer in lab rats)

PolyHeme uses treated human hemoglobin, and is clinical trials (although there are concerns about it's health effects, but they could be statistical anomalies)

Consider the following scenario. A patient is advised by doctors to have a particular proceedure done. We'll assume that such surgery is optional, and can be done using bloodless techniques. Now opening up the body bypasses many of the natural defenses, thus exposing the patient to the risk of many infections which would not be a threat should the patient have sought other remedies that did not involve surgery. Does the risk of infection nullify the surgery option? Or is it merely another factor to consider when weighing the options?