Please choose the correct ending to complete the given sentence: Health: [header] How to prepare for knee arthroscopy surgery (teens ) [title] Find out what your pre-op instructions are. [step] You might have to stop taking medications such as nsaids up to two weeks before your surgery. You will also want to know how long before your procedure you must fast.

Ending1: [substeps] Pre-op surgery uses wax to help heal the skin and repair fissures that cause knee dysplasia. Waxing procedures are administered at onsite implant locations such as the c-sections. Ending2: Ask your surgeon when and where you need to fast. [title] Use crutches so that you don't put any weight on your knee. Ending3: Weigh the pros and cons of treatment for knee dysplasia. For example, if your surgery is on your calf, you might want to opt for fasting for two weeks (at which point, you might be allowed to catch an nsaid) after two weeks of surgery. Ending4: It is often from midnight the night before surgery on, but there are exceptions, so be sure to go over this with your surgeon. [title] Find out what you may need to get ready for post-op.

Answer format: ending1/ending2/ending3/ending4