By entering the coding or chip into the glucose meter, the meter will be calibrated to that batch of test strips. However, if this process is carried out incorrectly, the meter reading can be up to 4 mmol/L (72 mg/dL) inaccurate.
If you're having keyhole surgery (laparoscopy), the endoscope will be inserted into a small incision your surgeon makes in your skin. An endoscopy usually takes between 15 and 60 minutes, depending on what it's being used for.
Colonoscopy should take about 30 minutes: 12 minutes to get the scope in 5 or 6 feet, and 12 minutes or so to take it out. Then if polyps need to be removed it will take longer, depending on the number and the size of the polyps.