What to Expect as a Patient at FNASC

The Functional Neurosurgical Ambulatory Surgery Center (FNASC) offers patients the convenience of having their DBS generator placed and programmed in an outpatient setting and going home the same day.

Dr. David VanSickle, board-certified neurosurgeon who has performed more robot-assisted Asleep DBS surgeries than any other surgeon in the world, personally performs all procedures at FNASC. Patients can receive their initial DBS generator placement and DBS programming or their replacement DBS generators and DBS reprogramming all in the same facility.  

Implanting the DBS generator is performed with the patient asleep under general anesthesia. The minimally invasive procedure takes about 90 minutes to complete. Most patients are able to go home shortly after surgery.


Functional Neurosurgical Ambulatory Surgery Center

11 W. Dry Creek Circle, Suite 120, Littleton, CO 80120

Hours: Open the first and third MONDAY of each month from 6 a.m. to 5 p.m. MT

To learn more or to schedule an appointment, call 303-955-5555 or 720-524-7062.

Fax: 720-463-1090


Each patient is unique, and each patient experience is important to the FNASC staff. Therefore, every FNASC patient receives detailed, personalized instructions before beginning the procedure.

But, in general, patients can expect the following:

When your surgery is scheduled:

To make your surgery day a seamless experience where you can walk in, check-in, and be ready for your procedure rather than having to complete pages of paperwork, we recommend you register online through One Medical Passport as soon as your procedure has been scheduled. 

Completing your medical passport online will take approximately 15 to 30 minutes. Make sure to have the following information available before starting:

  • Health insurance information
  • Name, address and phone number of your primary care physician
  • List of all current medications including their dosage and frequency
  • List of prior surgical procedures and the approximate dates

Click on the button below to begin your registration through One Medical Passport. 

1MP button

Before DBS generator placement

  • Stop taking any blood-thinning medications, including aspirin and ibuprofen, 7 days before the procedure.
  • Continue taking Parkinson’s or seizure medications and any blood pressure medications until the day of surgery.
  • The night before your procedure, shower using a special antibacterial soap called chlorhexidine gluconate (CHG) from the neck down. Do not use CHG on your face or above the neck.

Day of DBS generator placement

  • We ask that you not eat or drink after midnight the night before surgery and that you not drink alcohol for 24 hours before the procedure. Any medications needed the day of surgery should be taken with a very small amount of water.
  • Shower again before coming to FNASC using chlorhexidine gluconate (CHG) antibacterial soap from the neck down. Do not use CHG on your face or above the neck.
  • Leave jewelry and valuables at home and remove all makeup before arriving.
  • Wear a shirt that buttons rather than one that must be pulled on over your head, as the procedure is performed on your upper torso.
  • Arrange for a loved one, friend, or other transportation home, as you will not be allowed to drive following the procedure due to general anesthesia.

After DBS generator placement

  • You may be drowsy for several hours after the procedure, so plan on resting when you return home. However, it is a good idea to take brief walks several times the day of surgery and the day after.
  • We recommend that you drink plenty of fluids and slowly return to your normal diet.
  • When you leave FNASC, we will provide you with specific instructions for what you can and cannot do for the next few days or weeks, as well as personalized instructions about medications. In general, though, for the first 24 hours, patients should not:
    • Drive a vehicle or operate machinery
    • Drink alcoholic beverages
    • Smoke
  • Although you may experience soreness at the incision site, you should be able to resume most normal activities the next day, including showering. You may remove the dressings from the surgery site, but don’t remove the Steri-Strips™.
  • For several weeks after the procedure, most patients should avoid:
    • Strenuous activity
    • Raising arms overhead
    • Lifting anything heavier than 10 pounds

DBS generator concerns

If you have any questions or concerns, you should not hesitate to call your surgeon. You also can call FNASC at

303-955-5555 or 720-524-7062. Please call if you experience:

  • Fever of 101 F or above
  • Sudden pain you have not experienced before
  • Cloudy drainage from the surgery site
  • Redness, warmth, or firmness around the surgical site
  • Persistent nausea or vomiting
  • Bleeding or oozing from the surgery site that does not stop after applying pressure for 10 minutes
  • Increased swelling or numbness of the fingers or toes