Learn Swedish: Tack vare fonden kan läkaren rädda patienten. - Thanks to the fund, the doctor can save the patient.

Tack vare translates to "thanks to" and is used when the cause leads to a positive outcome, like saving the patient. If you used på grund av (because of / due to), it would sound neutral or even suggest the fund is a negative obstacle, which doesn't fit this positive situation.

Why is the word order kan läkaren instead of läkaren kan?

This is the Swedish V2 (verb-second) rule in action. Because the sentence starts with the entire prepositional phrase Tack vare fonden occupying the first position, the finite verb kan must take the second position. This forces the subject läkaren to come immediately after the verb.

Could I use spara instead of rädda to mean "save" the patient?

No, Swedish uses different words for different types of saving. Rädda means to rescue or save someone from danger, which fits perfectly for a doctor and a patient. Spara means to save up, keep, or conserve something, like saving money in a bank or saving a document on your computer.

Does tack vare require the noun to be in the definite form like fonden?