Fistulogram with contrast (DC) in Karachi at Dr. Essa Lab

Understanding the Fistulogram with contrast (DC) at Dr. Essa Lab

The Fistulogram with contrast (DC) is a highly specialized diagnostic fluoroscopy procedure designed to evaluate, map, and delineate abnormal pathways known as fistulas. A fistula is an abnormal connection or tunnel that develops between two epithelialized surfaces, such as between two internal organs or between an internal organ and the external skin surface. By utilizing real-time digital fluoroscopy and a specialized water-soluble iodinated contrast medium, this examination provides clinicians with a precise, dynamic map of the fistulous tract. Dr. Essa Lab, a premier diagnostic institution in Pakistan, performs this advanced imaging study with the highest level of clinical precision, ensuring accurate anatomical mapping that is critical for successful surgical planning and medical management.

During a Fistulogram with contrast (DC), a radiologist carefully introduces a contrast agent directly into the external opening of the fistula using a small, flexible catheter or cannula. As the contrast fluid flows through the tract, real-time X-ray imaging (fluoroscopy) captures its path, revealing the length, width, course, and any branching networks of the fistula. This diagnostic value is unmatched, as it clearly demonstrates whether the tract communicates with deeper structures, such as the bowel loops, urinary bladder, or pelvic cavity. The digital contrast technology employed at Dr. Essa Lab captures high-contrast, high-resolution images while minimizing radiation exposure to the patient. This test is indispensable for diagnosing complex pelvic diseases, monitoring post-surgical healing, and guiding therapeutic interventions for patients suffering from chronic draining wounds.

Clinical Procedure: What to Expect

Patient Preparation

Proper preparation is essential to ensure the safety of the patient and the diagnostic quality of the Fistulogram with contrast (DC) at Dr. Essa Lab. Patients are advised to follow these guidelines carefully:

• Fasting Requirements: Depending on the location of the fistula, patients may be instructed to fast (no food or drink) for 4 to 6 hours prior to the procedure, especially if the fistula is located in the abdominal or pelvic region.
• Bowel Preparation: For perianal, rectovaginal, or colonic fistulas, a mild laxative or cleansing enema may be recommended the night before or the morning of the test to clear the distal bowel of fecal matter, ensuring unobstructed visualization.
• Contrast Allergy Screening: Patients must inform the clinical staff if they have a history of allergies, particularly to iodinated contrast media, shellfish, or specific medications.
• Kidney Function Test: A recent Serum Creatinine report may be required, particularly for elderly patients or those with a history of kidney disease, to ensure safe elimination of any contrast that might be absorbed.
• Medication Review: Patients should discuss their current medications with the doctor. While most medications can be continued, certain drugs may need to be temporarily adjusted.
• Comfortable Clothing: Wear loose, comfortable clothing. You will be asked to change into a sterile patient gown before the procedure begins.
• Prior Imaging: Bring all previous X-rays, CT scans, MRIs, or surgical summaries related to the fistula to assist the consultant radiologist during the evaluation.

During the Procedure

The Fistulogram with contrast (DC) is performed in a dedicated digital fluoroscopy suite at Dr. Essa Lab by an experienced consultant radiologist assisted by trained radiographers. The procedure is designed to maximize patient comfort and diagnostic accuracy:

• Patient Positioning: The patient is positioned on the fluoroscopy table. The exact position (supine, prone, or lateral) depends on the anatomical location of the fistula’s external opening.
• Skin Preparation: The skin surrounding the external opening of the fistula is thoroughly cleansed with an antiseptic solution, and sterile drapes are placed around the area to maintain an aseptic environment.
• Catheter Insertion: The radiologist gently inserts a small, soft, flexible catheter, cannula, or feeding tube into the external opening of the fistula. This step is performed with extreme care to minimize discomfort.
• Contrast Injection: A water-soluble, iodinated contrast agent is slowly injected through the catheter. Under real-time fluoroscopic guidance, the radiologist monitors the flow of the contrast as it fills the tract.
• Image Acquisition: Multiple digital X-ray images are captured at various angles (anteroposterior, oblique, and lateral) to document the entire course of the tract and identify any internal connections.
• Sensation: Patients may feel a mild sensation of pressure, warmth, or fullness as the contrast agent fills the tract, but the procedure is generally well-tolerated and does not require general anesthesia.
• Duration: The entire procedure typically takes between 30 to 45 minutes, depending on the complexity and branching of the fistulous tract.
• Post-Procedure Care: Once the images are verified, the catheter is removed, the area is cleansed, and a sterile dressing is applied. Patients can usually resume normal activities immediately.

When is a Fistulogram with contrast (DC) Performed?

Assessment of Complex Perianal Fistulas

Perianal fistulas, which often arise from infected anal glands or inflammatory bowel diseases like Crohn’s disease, present with persistent pain, swelling, and purulent discharge. A Fistulogram with contrast (DC) is performed to map these complex tracts, determining whether they cross the internal or external anal sphincters. This mapping is vital for surgeons to avoid damaging the sphincter muscles during surgical repair, thereby preventing postoperative fecal incontinence.

Evaluation of Enterocutaneous and Enteroenteric Fistulas

Enterocutaneous fistulas represent abnormal connections between the gastrointestinal tract and the skin. They frequently occur as postoperative complications or due to severe intra-abdominal inflammation. Physicians request a fistulogram to identify the exact segment of the bowel from which the fistula originates, assess the caliber of the tract, and check for distal bowel obstruction, which is crucial for planning nutritional and surgical management.

Investigation of Pelvic and Genitourinary Fistulas

Fistulas can develop between pelvic organs, such as rectovaginal or colovesical fistulas. These conditions cause highly distressing symptoms, including the passage of gas or stool through the vagina or urethra, recurrent urinary tract infections, and severe localized pain. The contrast study at Dr. Essa Lab helps delineate these deep pelvic communications, providing clear visual evidence of the fistulous pathway.

Post-Surgical Complications and Anastomotic Leaks

Following major abdominal or pelvic surgeries, such as bowel resections, patients may develop deep tissue infections or anastomotic leaks that lead to sinus tracts or fistulas. A fistulogram is performed to evaluate the integrity of surgical anastomoses, detect active leaks, and determine if a persistent fluid collection or abscess cavity is communicating with the bowel or the skin surface.

Delineation of Chronic Draining Sinuses

Chronic, non-healing wounds or sinus tracts that continuously drain pus or serous fluid despite antibiotic therapy require detailed anatomical investigation. These tracts may stem from deep-seated infections, retained surgical foreign bodies, or chronic osteomyelitis. A Fistulogram with contrast (DC) allows radiologists to trace the tract to its origin, identifying any hidden abscess cavities or bone involvement that must be addressed to achieve complete healing.

What Does a Fistulogram with contrast (DC) Detect?

The Fistulogram with contrast (DC) at Dr. Essa Lab is an exceptionally sensitive diagnostic tool. It is capable of detecting a wide range of anatomical and pathological findings, including:

• Tract Path and Geometry: The precise course, length, and diameter of the fistulous tract.
• Branching Patterns: Complex, multi-limbed, or ‘horseshoe’ configurations that are difficult to detect clinically.
• Internal Openings: The exact site where the fistula connects with internal mucosal surfaces, such as the rectum, colon, or small intestine.
• Blind-Ending Tracts: Sinus tracts that do not communicate with any internal organ or cavity.
• Abscess Cavities: Associated localized fluid collections or abscesses that act as reservoirs for infection.
• Contrast Extravasation: Active leakage of contrast medium into surrounding pelvic or abdominal soft tissues.
• Organ Communication: Abnormal connections to the urinary bladder, vagina, or adjacent bowel loops.
• Tract Caliber Variations: Areas of narrowing (strictures) or localized dilatation along the pathway.
• Retained Foreign Bodies: Non-radiopaque surgical materials, suture loops, or fecaliths within the tract.
• Sphincter Muscle Involvement: The relationship of perianal tracts to the anal sphincter complex.
• Adjacent Bowel Mucosal Changes: Signs of active inflammation, ulceration, or cobblestoning in adjacent bowel loops, indicative of Crohn’s disease.
• Multiple External Openings: Complex disease presentations with several cutaneous exit points.
• Tract Obstruction: Debris, granulation tissue, or stenosis preventing the complete passage of contrast.
• Bony Involvement: Communication of the tract with adjacent pelvic bones, suggesting osteomyelitis.
• Anastomotic Dehiscence: Breakdown of surgical connections in postoperative patients.
• Pressure Effects: Displacement or compression of neighboring pelvic organs by large inflammatory tracts or abscesses.
• Tract Chronicity: Fibrotic thickening of the tract walls, indicating a long-standing, chronic fistula.
• Deep Fascial Plane Penetration: Extension of the tract through deep pelvic fascia into the buttocks or thigh.

Turnaround Time and Report Access at Dr. Essa Lab

At Dr. Essa Lab, we understand that timely diagnostic results are critical for effective clinical decision-making and surgical planning. The digital images captured during your Fistulogram with contrast (DC) are immediately archived in our Picture Archiving and Communication System (PACS). A highly experienced consultant radiologist reviews the real-time fluoroscopic sequences and static digital radiographs to compile a comprehensive, detailed diagnostic report.

The final verified report, along with high-resolution digital images, is typically available within 24 to 48 hours after the procedure. Dr. Essa Lab offers a highly convenient online reporting portal, allowing patients and referring physicians to securely view, download, and print reports and images from the comfort of their homes or clinics. Additionally, physical copies of the report and diagnostic films can be collected directly from the main diagnostic center in Karachi or any designated branch.

Fistulogram with contrast (DC) Findings Overview

The following table outlines the key anatomical structures and parameters evaluated during a fistulogram, comparing normal physiological states with potential pathological findings:

Structure / Parameter Evaluated	Normal Findings	Possible Abnormal Findings
Fistulous Tract	No abnormal tract or pathway visualized.	Single, multiple, or branching tracts filled with contrast.
Contrast Flow & Containment	No contrast extravasation; smooth flow within normal lumens.	Extravasation into pelvic cavities, soft tissues, or peritoneal space.
Internal Communication	No abnormal connections between organs.	Contrast outlining communication with rectum, bladder, or vagina.
Surrounding Soft Tissues	Normal tissue planes; no fluid collections.	Contrast-filled abscess cavities or inflammatory masses.
Tract Caliber & Course	Not applicable (no tract present).	Irregular, tortuous, stenotic, or dilated tract pathways.
Sphincter Relationship	Intact sphincter complex; no trans-sphincteric tracts.	Tract crossing internal or external anal sphincters.
Retained Material	No foreign bodies or filling defects.	Filling defects indicating gas bubbles, fecaliths, or surgical material.

Note: Diagnostic findings should always be interpreted by a qualified healthcare professional together with the patient’s symptoms, medical history, physical examination, laboratory investigations, previous imaging studies, and other relevant clinical information. Additional investigations or specialist consultation may be recommended depending on the findings.

Why Choose Dr. Essa Lab for Fistulogram with contrast (DC)?

• Pioneer in Diagnostics: Established in 1987 by Prof. Dr. M. Essa Abdulla, Dr. Essa Lab has over three decades of trusted diagnostic excellence in Pakistan.
• Advanced Digital Fluoroscopy: Our state-of-the-art digital fluoroscopy systems provide exceptionally clear, high-resolution images while minimizing radiation exposure.
• Expert Consultant Radiologists: Every fistulogram is performed and interpreted by highly experienced radiologists specializing in gastrointestinal and pelvic imaging.
• ISO Certified Quality Standards: Dr. Essa Lab strictly adheres to international quality control protocols, ensuring reliable and accurate diagnostic reporting.
• Extensive Branch Network: With multiple convenient locations across Karachi and other major cities, accessing premium diagnostic services is highly convenient.
• Secure Online Reports: Patients and physicians can access, download, and share diagnostic reports and high-resolution images through our secure online portal.
• Patient-Centric Care: Our compassionate clinical team prioritizes patient comfort, privacy, and safety throughout the contrast-enhanced procedure.
• Comprehensive Diagnostic Services: From advanced imaging to molecular pathology, Dr. Essa Lab offers a complete suite of diagnostic solutions under one roof.