Kidney Stent Removal

Introduction

Ureteric stents are fundamental tools utilized across various clinical scenarios within the urological realm. For short- or long-term applications, inserting a ureteric stent remains among urology's most common interventional procedures. Over recent decades, significant technological strides have been made in developing ureteral stents. However, creating an ideal stent without notable side effects remains challenging. Indwelling ureteric stents often lead to physical discomfort for patients.

They can give rise to clinical complications such as bacterial adherence, encrustation, misplacement, stent fracture, and instances of forgotten stent syndrome, which can impact patients’ quality of life. Various stents are available on the market, each designed to mitigate infections and enhance patient symptom management and tolerance. In this review, kidney stent removal indications and procedures are discussed.

What Is a Kidney Stent?

Ureteral stents are slender, flexible tubes placed within the ureter, the pathway facilitating urine flow from the kidneys to the bladder. These stents serve to maintain the openness of the ureter in cases of constriction or obstruction. Kidney stones or inflammation can impede the normal urine flow through the ureter. Ureteral stents are elongated, bendable tubes inserted by physicians into the ureter via the urethra, the exit point for urine from the body. Typically measuring 8 to 10 inches (22 to 24 centimeters) in length, these stents can be crafted from natural, synthetic, or metallic substances.

The design of ureteral stents features J-shaped ends, ensuring their stable positioning within the kidney and bladder and preventing displacement. Physicians often term these stents "double-J" stents. Ureteral stents facilitate the passage of urine from the kidneys to the bladder. Obstruction in the ureter can impede or halt urine flow. Urinary tract blockage can arise from various factors, including kidney stones, inflammation, or tumors. Ureteral stents can alleviate symptoms such as flank pain, abdominal discomfort, or swelling by restoring proper urine flow.

How Is A Ureteral Stent Removal?

Ureteral stents are extracted using two primary techniques:

1) If a stent string is left in place, it can be removed by gently pulling on the string.

2) Alternatively, a cystoscopy procedure is performed, where a camera is inserted into the bladder to locate and grasp the stent with a small tool.

When a Stent String is Utilized:

Occasionally, a urologist may leave a string attached to one end of the ureteral stent. This string extends from the stent and protrudes out of the urethra, visible at the urethral meatus, where urine exits the body. Instructions and images illustrating a stent with an attached string are provided below. The visible string is firmly held to extract the stent, and a steady, continuous pull is applied until the entire stent is removed. The flexible curls at the end of the ureteral stent facilitate easy removal by uncurling as the stent is pulled out.

Removing a Stent via Cystoscopy:

When no or only a partial string remains attached, the urologist will utilize a cystoscope to access your bladder through the urethra. With the aid of this camera, they can locate the stent and employ a tool to grasp and extract it securely. This procedure typically occurs swiftly, is often conducted in the clinic, and lasts only a minute or so in most cases.

Steps Involved in Removing a Ureteral Stent via Cystoscopy:

1. Introduce a cystoscope into the bladder. (A cystoscope is a camera designed for bladder examination).

2. Identify the stent.

3. Use a grasper to grip the stent securely.

4. Withdraw the cystoscope, grasper, and securely held stent as a single unit.

How Uncomfortable Is Stent Removal Using Cystoscopy?

For many patients, stent removal is less uncomfortable than anticipated. It is common for patients to be surprised that the procedure has already concluded and the stent has been removed.

However, discomfort during stent removal does occur, particularly in men, due to their longer urethra. This discomfort may stem from the cystoscope or the sensation of the extracted stent. While most patients do not feel the stent sliding out of the kidney, some may experience discomfort during this part of the procedure.

Applying lidocaine jelly into the urethra before the procedure can help numb the area, although it would not eliminate sensation. Tightening the urethral sphincter as the scope is inserted into the bladder may cause increased discomfort in men and occasionally in women. Relaxing, taking deep breaths, and avoiding tensing up during cystoscopy can alleviate discomfort.

What To Expect After Stent Removal?

• Rest when fatigued and allow the body ample time to recover.

• Avoid sudden movements or heavy lifting until you feel better.

• Many individuals can resume work the day following the procedure.

However, if the job involves strenuous activities, the person may easily experience discomfort in the kidney area or fatigue.

In such cases, consider reducing the intensity of your activities while you recuperate.

• The person should maintain a regular diet, but if the stomach is upset, opt for bland, low-fat foods like plain rice, broiled chicken, toast, and yogurt.

• Stay well-hydrated by consuming plenty of fluids, unless advised otherwise by the doctor.

• Follow the doctor's instructions regarding the resumption of the medications.

• If the patient takes blood thinners like Aspirin, consult the doctor regarding when to restart them. Ensure a clear understanding of the doctor's directives.

• Practice caution with medications, adhering closely to label instructions.

• Take prescribed pain medication as directed.

• If the patient is not on prescribed pain medication, inquire whether over-the-counter options are suitable for the patient.

• If antibiotics were prescribed, adhere to the dosage schedule without interruption, even if symptoms improve. Complete the full course of antibiotics as instructed by the doctor.

Conclusion:

Ureteral stents are widely employed in urology, yet their presence within the body often leads to infection and discomfort, varying in severity among patients. To alleviate symptoms, transplant surgeons typically prioritize careful consideration of stent placement. Various methods and designs exist to determine the optimal stent length to minimize discomfort and pain.

Pharmacological approaches, particularly using alpha-blockers alone or in combination with anticholinergics, have consistently shown positive outcomes in enhancing patient comfort with stents. Although drug-eluting ureteral stents are still in their early stages of development, several strategies are being explored to alleviate stent-related symptoms.

The financial impact of indwelling ureteric stenting is considerable and warrants attention during the stenting process. Further research, including robust patient-reported outcomes, is essential for a comprehensive understanding of stent-patient interactions and for developing an ideal stent.