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Colorectal Surgery

Imran Hassan, MD, FACS, FASCRSThe General Surgery Clinic’s colorectal surgery is under the direction of board-certified and fellowship-trained surgeon Imran Hassan, MD, FACS, FASCRS. Dr. Hassan specializes in the diagnosis and treatment of diseases of the lower intestinal tract.

Conditions We Treat

Anal Cancer
Anal Fissure
Anal Fistula
Anal Incontinence
Anal Pain
Anal Stricture
Anal Warts
Anorectal Abscess
Anorectal Fistula
Bowel Incontinence
Cholelithiasis (gallstones)
Colon Cancer
Colonic Polyps
Colonic Volvulus
Colorectal Trauma
Colostomy Problems
Constipation and change in bowel habits
Crohn's Disease
Diverticular Disease
Inflammatory Bowel Disease
Irritable Bowel Syndrome (IBS)
Hernias (Inguinal, Ventral, Umbilical, Incisional, Internal, Incarcerated)
Pelvic Floor Dysfunction
Perianal Abscess
Pilonidal Disease
Pruritus Ani (Anal Itching)
Malignant Tumors of Anal Canal
Rectal Bleeding
Rectal Cancer
Rectal Prolapse
Ulcerative Colitis


Colon, Rectal and Anal Cancer Surgeries
Colonoscopy with Complex Polypectomy,
Fistula Surgeries
Flexible Sigmoidoscopy
Genetic Counseling
Hemorrhoid Surgery (Rubberband Ligation)
Laparoscopic Appendectomy
Laparoscopic/Robotic Cholecystectomy
Large and Small Colon Resections (Laparoscopic/Open/Robotic)
Major and Minor Anorectal Procedure

Preparing for Surgery

These are general instructions for your surgery. A nurse at the General Surgery Clinic will go over specific instructions with you for your surgery.

If you have any questions regarding your surgery, please call us at (319) 398-6747.

Parking for Surgery at Mercy Medical Center

Please use the 8th street parking ramp. Park on the 2nd level, South entrance. Report to Mercy’s Surgery Center Waiting Area.

You may have nothing to eat or drink after midnight on the day of your surgery. This is to prevent problems with the anesthesia medicines.

Take only the medicines you are told to take the day of surgery. You will be told in your pre-anesthesia visit what medicine to take or not take.

The Day of Surgery

Wear comfortable clothes that are easy to get on and off. Leave all jewelry and valuables at home. We don't want them to get lost or misplaced and it can be dangerous to wear jewelry during surgery. This includes wedding rings, earrings, or other piercings.

If your surgery is under anesthesia, you cannot drive for at least 24 hours and someone needs to stay with you for 24 hours after your procedure. This is in case there would be any problems or you would need help.

After most procedures, you will receive a prescription for pain medicine. You should take this regularly the first few days after surgery to stay ahead of the pain. You will be given instructions on how often to take this medicine. You cannot drive or operate heavy machinery while taking pain medication as it can make you sleepy or confused. It is common for these medicines to cause upset stomach and constipation. Taking the medicine with food and taking a stool softener while on the medication will help with this. We recommend buying a bottle of Colace (docusate) at the drugstore to have available to take while on the pain medication.

Infection Prevention

We will give you antibiotics at the time of surgery to help prevent infection.

In order to get ready for surgery, there are things that you can do to help decrease the chance you will get an infection. To make this process easier, the Mercy General Surgery Clinic has given you Chlorohexidine Gluconate 4% solution (CHG) soap to use the night before surgery. Please review the information and follow the directions below.

Do not shave or clip the area where your surgery incisions will be. This can cause damage to the skin and infection and could result in your surgery being cancelled or postponed.

Directions for Showering

Please take a shower the night before surgery or the morning of surgery.

Wash as you would normally with shampoo and soap.

The nurse from the General Surgery Clinic will go provide you with specific instructions where to use the special soap (Chlorohexidine Gluconate 4% solution). If you have any questions, please call (319) 398-6747.

  • Make sure all soap and shampoo is rinsed off before washing with this special soap.
  • Be very careful to keep out of eyes and ears.
  • You can wash the groin area skin, but not the internal tissues.
  • Do not to use a body lotions or oils after bathing or showering with this soap.

Warning: For external use only. Stop use and ask a doctor if irritation or any rash occurs. Do not use if:

  • you are allergic to chlorhexidine gluconate or any other ingredients
  • inside the genital area (ok to clean the outside skin)
  • as a preoperative skin prep of the head or face

Quit Smoking Before Surgery

Did you know smoking increases your risk of surgical complications? Quitting smoking before surgery is the ideal time and is proven to have a higher quit rate. Learn more about Mercy’s Smoking Cessation classes to be on your way to a healthy smoke-free life.

Preparing for a Colonoscopy

Colonoscopy Prep (Peg, GoLytely, Nulytely)

This is the most common type of prep for colonoscopy with Dr. Hassan.

If you are diabetic or require certain type of sedation/anesthesia called “MAC,” please contact us at (319) 398-6747 for further instructions.

Day of Colonoscopy

Please arrive at Mercy Digestive Health Center one hour prior to your procedure time. At that time, they will go over your history and put in an IV.

Park on Level 2 of the ramp on 8th Street and enter the building through the North Entrance.

IMPORTANT - Please Read These Instructions at Least 2 Weeks Before Your Colonoscopy

5 Days Prior to Colonoscopy

You doctor may have you hold certain medications prior to your procedure. Below are the most common medications. If you have questions regarding medications, please call us at (319) 398-6747.

Medication Instructions

If you are taking any blood thinners/anti-platelets, please inform the General Surgery office by calling (319) 398-6747 well in advance of your procedure in order to get instructions about whether to continue or discontinue the medication. Some examples are Warfarin, Coumadin, Xarelto, Lovenox, Pradaxa, Plavix, Effient, Aggrenox. Do not stop taking any medications without talking to your doctor.

  • Do NOT take medications that stop diarrhea, such as Imodium, Kaopectate, or Pepto Bismol.
  • Do NOT take fiber supplements, such as Metamucil, Citrucel, or Perdiem.
  • Do NOT take products that contain iron, such as multi-vitamins.
  • Do NOT take vitamin E or fish oil.
  • Do not use Advil (Ibuprofen), Aleve (Naproxen), Relafen, Mobic, Motrin or other NSAIDS for five days prior to surgery, if possible. You may take Tylenol or a baby aspirin.

You will need to purchase the following:

  • Your prescription for an oral bowel purge or preparation solution (Peg, GoLytely, Nulytely)
  • You will need to purchase an over the counter laxative Dulcolax (4 tablets)

3 Days Prior to Colonoscopy

DO NOT EAT high-fiber foods such as fruits (fresh and dried), vegetable with skins, corn, nuts, seeds, popcorn, tomatoes, granola or health bars or wheat bread. See information sheet on low residue/fiber diet.

1 Day Prior to Colonoscopy

You may have a light breakfast before 9 a.m. After that, you are to have clear liquids only and are encouraged to drink at least 10 eight-ounce glasses throughout the day. We do not consider coffee a clear liquid.

Clear liquids include:

  • water
  • apple or white grape juice
  • broth
  • tea (without milk or creamer)
  • clear carbonated beverages such as ginger ale or lemon-lime soda
  • Gatorade or other sports drinks (not red)
  • Kool-Aid or other flavored drinks (not red)
  • plain Jell-o or other gelatins (not red), without fruit in them
  • popsicles (not red)

Do not drink alcohol on the day before or the day of the procedure.

Evening Prior to Colonoscopy

At 3 p.m. the day prior to the procedure: Take two Dulcolax tablets. Then, 10 minutes later, take two more Dulcolax tablets for a total of four. Take each dose with an eight-ounce glass of water. Dulcolax is an over-the-counter medication; no prescription is needed. Do not crush or chew them.

Colon prep solution preparation: Follow the instructions on the colon preparation solution packet for mixing with water. Shake well. You may add the flavor packet that came with the bowel preparation. DO NOT add ice, sugar or any flavorings to the solution. Drink this solution at room temperature.

At 6 p.m. the day prior to the colonoscopy: Began drinking colon preparation solution. Drink an eight-ounce glass every 5 to 10 minutes (for a total of about eight glasses or the whole total volume). It is best to drink the whole glass quickly rather than sipping small amounts continuously. When you have completed the eight glasses, or half of the prep, place the rest of the jug into refrigerator. You will be finishing the rest in the early morning.

Feelings of bloating are common after the first few glasses because of the large amount of fluid ingested. This is usually temporary and should disappear once bowel movements begin. If you experience nausea or cramping, stop drinking for 15 to 45 minutes. Try drinking warm broth or hard candy and then begin drinking again. Your stools should begin after the first 4-6 glasses. Continue drinking once the stools have begun. They should become more and more liquid and light in color.

Morning of Colonoscopy

Take the remaining colon preparation out of the refrigerator half an hour prior to drinking the second dose.

At 6 a.m. on the day of the colonoscopy: Began drinking the rest of the colon preparation solution as above and continue drinking until gone. The prep is not complete until the stools are clear to light yellow in color.

You may not have anything to eat or drink for four hours prior to your procedure except blood pressure and asthma medications.

Designated Driver on the Day of Your Exam

A responsible adult (family member or friend) MUST come with you to your colonoscopy and REMAIN in the endoscopy area until you are discharged! You are NOT ALLOWED to drive, take a taxi or bus, or leave the Endoscopy Center ALONE.

If you do not have a responsible adult (family member or friend) with you to take you home, your exam cannot be done with sedation and will be cancelled.

Please take necessary prescription medications such as blood pressure medications and asthma medications with a small amount of water in the morning off the colonoscopy.

If you use any inhalers, please bring them with you to the hospital.

Bring a list of medications and allergies with you and please leave your valuables at home.

If you experience any difficulty with your prep, call Mercy Endoscopy (Digestive Health) at (319) 398-6484 between 7 a.m. and 5 p.m. After 5 p.m., please call (319) 533-2205. You may call any time of day or night. Endoscopy nurses are on call 24 hours a day, seven days a week.

About Dr. Hassan

Dr. Imran Hassan completed his residency in General Surgery from the Mayo Clinic in Rochester, MN. He then received postgraduate training in colon and rectal surgery at the Freeman Hospital in Newcastle-upon-Tyne in England. After this, he returned to the Mayo Clinic and completed a two-year research and clinical fellowship in colon and rectal surgery. During this time, he also completed a certificate in clinical research from the Mayo School of Graduate Medicine. In 2011, Dr. Hassan completed the Certificate in Patient Safety, Error Science and Disclosure Program from the University of Illinois, Chicago, IL.

He has published more than 70 original articles, reviews, chapters and editorials. Dr. Hassan also serves on the editorial board of several national and international surgical journals, including the Diseases of the Colon and Rectum, Colorectal Diseases, Journal of Gastrointestinal Surgery, Journal of Surgical research and World Journal of Surgery. His research interests include healthcare outcomes, patient safety and process improvement initiatives.

Dr. Hassan is currently a clinical Associate Professor in the Department of Surgery at the University of Iowa. His clinical interests include the surgical management of benign and malignant colorectal diseases, minimally invasive surgery, and diagnostic and therapeutic endoscopy.

Visit Dr. Hassan's online profile or view his full Curriculum Vitae to see all of his experience and publications.

Contact Information

8th & 8th Medical Office Building

Mercy General Surgery Clinic
Level 3, Suite 300
788 8th Ave SE
Cedar Rapids, IA 52401

Please park in our lot located at the corner of 7th St. and 8th Ave.

Phone Number:
For questions or scheduling, call:
(319) 398-6747

Monday through Friday
8 a.m. to 4:30 p.m.