Services

Colonoscopy +

Colonoscopy is an endoscopic examination of the lining of the large intestine. This procedure is done to diagnose diseases of the digestive tract such as Crohn's disease and Ulcerative colitis and to screen for colon cancer. Routine screening with colonoscopy can reduce the risk of developing colon cancer by up to 90%.

In order for Dr. McDonald to be able to view the lining of the colon and detect any abnormal areas or identify and remove polyps, the colon must be completely cleaned out using a bowel preparation prior to the procedure. This involves following a low-fiber diet for 7 days, a clear liquid diet for one day, and taking laxatives that will cause diarrhea. There are different types of bowel preparations. Dr. McDonald will determine which prep is best for you based on your medical history.

Please contact our office if you have any questions regarding the following bowel preparation instructions:

You will receive sedative medication during your colonoscopy and cannot drive your car until the day after this procedure. Please arrange for someone to drive you home after your procedure. If you do not have assistance with transportation arranged, you cannot receive any sedative medications and the procedure may have to be cancelled. Please discuss any concerns with Dr. McDonald's staff.

7 DAYS PRIOR TO YOUR COLONOSCOPY

  • Stop taking any fiber supplements (Fibercon, Metamucil, Citrucel, etc.), and start the low-fiber diet.

5 DAYS PRIOR TO YOUR COLONOSCOPY

  • Stop taking iron and vitamins containing iron.
  • Stop taking the following medications/supplements: Aspirin, naproxen, ibuprofen, and vitamin E. These medications interfere with blood clotting. There are many over-the counter and prescription pain medications that thin the blood. Some common examples are: Bufferin, Anacin, Ecotrin, Excedrin, Indocin, Alka-Seltzer, Advil, Nuprin, Motrin, Naprosyn, Aleve, Feldene, Clinoril, Voltaren, Diclofenac, and Relafen. Please inform Dr. McDonald if you are taking ANY type of pain medication, arthritis medication, or blood thinners. (You may take Tylenol or acetaminophen for headaches, etc.)
    **If you take aspirin, Coumadin, Plavix, or any medication prescribed for blood thinning, please discuss this with Dr. McDonald's nurse so you can be instructed on how to take these medications during the 5-7 days prior to the procedure.**

THE DAY BEFORE YOUR COLONOSCOPY

  • Follow a clear liquid diet all day. You may not have solid food or non-clear liquids such as creamy soups, milk, orange juice, etc. You may have as much clear liquid as you want. Drinking plenty of liquid is important to prevent dehydration. Examples of clear liquids: Water, tea, coffee, soda (any color), ginger ale, clear strained fruit juices such as apple juice, flavored orange drinks, Gatorade, popsicles, strained soup broth, canned broth (chicken or beef), bouillon cubes (reconstituted), and Jell-O. Please do not eat red Jell-O or red popsicles and do not drink red Gatorade. The red color can pass through into the bowel movements and appear to be blood.
  • Follow the specific instructions outlined in the bowel preparation Dr. McDonald prescribed:
  • Additional Information:
    • It may be easier to drink the bowel preparation through a straw.
    • You may take Dramamine as directed one hour prior to drinking the prep solution to help control nausea.
    • Take your prescribed heart, blood pressure, thyroid, and/or breathing medication the morning of the procedure.
    • If you are diabetic and take medication to control your blood sugar, please talk to Dr. McDonald's nurse about how to take your medication(s) the day before and the morning of the procedure. Also, be sure to drink clear liquids that contain sugar since you will not be getting any sugar from the solid food you would normally be eating.
    • You may continue a clear liquid diet until 3 hours prior to your registration time.
  • For additional information regarding colonoscopy, please refer to ASGE Patient Information "Understanding Colonoscopy"
  • If you have any questions, please call our office at (920) 223 - 0490.

Flexible Sigmoidoscopy +

Flexible Sigmoidoscopy is an endoscopic procedure used to examine the rectum and lower part of the large intestine (sigmoid colon). This test is usually done when the source of symptoms such as bleeding or diarrhea is suspected to be coming from the rectum or sigmoid colon. The procedure can be done with or without sedation.

Please contact our office if you have any questions regarding the following preparation instructions:

  • If you receive sedative medication during your flexible sigmoidoscopy, you cannot drive your car until the day after this procedure. Please arrange for someone to drive you home after your procedure. If you do not have assistance with transportation arranged, you cannot receive any sedative medications and the procedure may have to be cancelled. Please discuss any concerns with Dr. McDonald's staff.
  • Stop taking the following medications 5 days prior to the procedure: Aspirin, other NSAIDs (non-steroidal anti-inflammatory drugs), and vitamin E. These medications interfere with blood clotting. There are many over-the counter and prescription pain medications that thin the blood. Some common examples are: Bufferin, Anacin, Ecotrin, Excedrin, Indocin, Alka-Seltzer, Advil, Nuprin, Motrin, Ibuprofen, Naprosyn, Aleve, Naproxen, Feldene, Clinoril, Voltaren, Diclofenac, and Relafen. Please inform Dr. McDonald if you are taking ANY type of pain medication, arthritis medication, or blood thinners. (You may take Tylenol or acetaminophen for headaches, etc.)
    *If you take aspirin, Coumadin, Plavix, or any medication prescribed for blood thinning, please discuss this with Dr. McDonald's nurse so you can be instructed on how to take these medications during the 5 days prior to the procedure.
  • If you are going to receive sedation, do not eat any solid food after midnight the evening prior to the procedure. You may have a clear liquid diet until 5 hours prior to your registration time.
  • Take your prescribed heart, blood pressure, thyroid, and/or breathing medication the morning of the procedure. If you are going to receive sedation and it is less than 5 hours prior to the procedure, use just enough water to help swallow the pills.
  • If you are diabetic and take medication to control your blood sugar, please talk to Dr. McDonald's nurse about how to take your medication(s) the morning of the procedure.
  • You will need to take one or two Fleet enemas starting 2 hours prior to the procedure. Please review the specific instructions with Dr. McDonald's nurse. If you are not going to be sedated for the procedure, you should not have anything to eat or drink until after the procedure once you start the enemas.
  • For additional information regarding Flexible Sigmoidoscopy, please refer to ASGE Patient Information: Understanding Flexible Sigmoidoscopy.
  • If you have any questions, please call our office at (920) 223-0490.

Upper Endoscopy +

Upper Endoscopy or esophagogastroduodenoscopy (EGD) is an endoscopic examination of the upper GI (gastrointestinal) tract (esophagus, stomach, and duodenum-the first part of the small intestine). This procedure allows Dr. McDonald to see exactly what the lining of the upper GI tract looks like and take biopsies if necessary to determine the cause of your symptoms.

It is very important that your stomach be empty for the procedure. An empty stomach allows Dr. McDonald to be able to safely see the entire lining of the upper GI tract. Please contact our office if you have any questions regarding the following preparation instructions:

  • You will receive sedative medication during this procedure and cannot drive your car until the day after this procedure. Please arrange for someone to drive you home after your procedure. If you do not have assistance with transportation arranged, you cannot receive any sedative medications and the procedure may have to be cancelled. Please discuss any concerns with Dr. McDonald's staff.
  • Stop taking the following medications 5 days prior to the procedure: Aspirin, other NSAIDs (non-steroidal anti-inflammatory drugs), and vitamin E. These medications interfere with blood clotting. There are many over-the counter and prescription pain medications that thin the blood. Some common examples are: Bufferin, Anacin, Ecotrin, Excedrin, Indocin, Alka-Seltzer, Advil, Nuprin, Motrin, Ibuprofen, Naprosyn, Aleve, Naproxen, Feldene, Clinoril, Voltaren, Diclofenac, and Relafen. Please inform Dr. McDonald if you are taking ANY type of pain medication, arthritis medication, or blood thinners. (You may take Tylenol or acetaminophen for headaches, etc.)
    *If you take aspirin, Coumadin, Plavix, or any medication prescribed for blood thinning, please discuss this with Dr. McDonald's nurse so you can be instructed on how to take these medications during the 5 days prior to the procedure.
  • Do not eat any solid food after midnight the evening prior to the procedure.
  • You may have a clear liquid diet until 5 hours prior to your registration time.
  • Take your prescribed heart, blood pressure, thyroid, and/or breathing medication the morning of the procedure. If it is less than 5 hours prior to the procedure, use just enough water to help swallow the pills.
  • If you are diabetic and take medication to control your blood sugar, please talk to Dr. McDonald's nurse about how to take your medication(s) the morning of the procedure.
  • For additional information regarding upper endoscopy, please refer to ASGE Patient Information: "Understanding Upper Endoscopy"
  • If you have any questions, please call our office at (920) 223-0490.

ERCP +

ERCP (endoscopic retrograde cholangiopancreatography) is a procedure that uses the combination of endoscope (a flexible tube that contains a camera and light source) and x-ray to view the bile ducts and pancreatic duct. This procedure is used in the diagnosis of disorders of the pancreas, bile duct, liver, and gallbladder.

This link to the ASGE (American Society for Gastrointestinal Endoscopy) reviews treatments (sphincterotomy, stone removal, stent placement, balloon dilation, and tissue sampling) that can be done through the ERCP scope

Please contact our office if you have any questions regarding the following preparation instructions:

  • You will receive sedative medication during the procedure and cannot drive your car until the day after this procedure. Please arrange for someone to drive you home after your procedure. If you do not have assistance with transportation arranged, you cannot receive any sedative medications and the procedure may have to be cancelled. Please discuss any concerns with Dr. McDonald's staff.
  • Stop taking the following medications 5 days prior to the procedure: Aspirin, other NSAIDs (non-steroidal anti-inflammatory drugs), and vitamin E. These medications interfere with blood clotting. There are many over-the counter and prescription pain medications that thin the blood. Some common examples are: Bufferin, Anacin, Ecotrin, Excedrin, Indocin, Alka-Seltzer, Advil, Nuprin, Motrin, Ibuprofen, Naprosyn, Aleve, Naproxen, Feldene, Clinoril, Voltaren, Diclofenac, and Relafen. Please inform Dr. McDonald if you are taking ANY type of pain medication, arthritis medication, or blood thinners. (You may take Tylenol or acetaminophen for headaches, etc.)
    *If you take aspirin, Coumadin, Plavix, or any medication prescribed for blood thinning, please discuss this with Dr. McDonald's nurse so you can be instructed on how to take these medications during the 5 days prior to the procedure.
  • Do not eat any solid food after midnight the evening prior to the procedure.
  • You may have a clear liquid diet until 5 hours prior to your registration time.
  • Take your prescribed heart, blood pressure, thyroid, and/or breathing medication the morning of the procedure. If it is less than 5 hours prior to the procedure, use just enough water to help swallow the pills.
  • If you are diabetic and take medication to control your blood sugar, please talk to Dr. McDonald's nurse about how to take your medication(s) the morning of the procedure.
  • For additional information regarding ERCP, please refer to ASGE Patient Information "Understanding ERCP"
  • If you have any questions, please call our office at (920) 223-0490.

Office Consulation +

The office of Mary McDonald, MD is located on the Mercy Medical Center campus in Oshkosh, Wisconsin.

When entering the building, please use the hospital's main entrance and take the elevator to the third floor. Our office is located in suite 300.

Upon arrival at the office, you will be asked to complete registration paperwork. If you prefer, these documents can be downloaded from our website and hand carried to your appointment. We will also make a copy of your insurance card, and collect any co-pay required by your insurance company.

Our professional medical staff includes Dr. McDonald, board-certified gastroenterologist with over 20 years of experience, and three registered nurses.

After your consultation with Dr. McDonald, any recommended tests or procedures will be scheduled by one of the RN's.

All test results are reviewed by Dr. McDonald, and then communicated via phone by one of our experienced RN's, who will take the time to explain your results, review Dr. McDonald's recommendations, and answer any questions.

Through Dr. McDonald's expertise, and dedication of the entire office staff, we will work with you to provide high-level, comprehensive, and compassionate care. Thank you for placing your trust in us.