A Research on Urinary Recovery After Robotic Prostate Surgery

Urinary continence and changes in urinary symptoms are important considerations for men undergoing surgery for clinically localised prostate cancer. While radical prostatectomy removes the prostate, the operation can temporarily affect the structures involved in normal urination and continence.
 

Recovery does not necessarily happen at the same rate for every patient. Some men may regain urinary control relatively quickly, while others may require several months before their symptoms improve.
 

A prospective study from Singapore followed 100 consecutive men who underwent robot-assisted laparoscopic radical prostatectomy (RLRP) and examined changes in urinary symptoms, quality of life and continence over the first year after surgery. The study found that most patients regained continence over time, while men who already had moderate to severe lower urinary tract symptoms before surgery experienced substantial improvements in urinary symptoms and quality of life.
 

Dr Wang Lushun of Arete Orthopaedic Centre was one of the contributors to the research, together with Stephanie Fook-Chong Man Chung, Sidney Kam Hung Yip, Weber Kam On Lau, Christopher Wai Sam Cheng and Hong Gee Sim. At the time, the research team was affiliated with the Department of Urology at Singapore General Hospital.

What Is Robot-Assisted Laparoscopic Radical Prostatectomy?

Robot-assisted laparoscopic radical prostatectomy is a surgical procedure used to remove the prostate in men with suitable clinically localised prostate cancer.
 

The operation is performed through small abdominal incisions using laparoscopic instruments controlled through a robotic surgical system.
 

The prostate is removed along with the tissues required as part of the cancer operation, and the bladder is then reconnected to the urethra.
 

Because the urinary sphincter and surrounding structures are involved in maintaining continence, patients may experience temporary urinary leakage after surgery.
 

The study specifically examined how urinary function changed after this procedure over time.

Why Can Urinary Function Change After Prostate Surgery?

Normal urinary control depends on several structures working together, including:

• The bladder

• The urethra

• Urinary sphincter mechanisms

• Pelvic floor muscles

• Supporting tissues around the bladder and urethra
   

Radical prostatectomy changes the anatomy of the urinary tract because the prostate is removed and the bladder is reconnected to the urethra.
 

The study noted that surgical factors and preservation of structures around the urethra may influence the recovery of continence after prostatectomy.
 

This means that urinary recovery should be viewed as a process rather than an immediate outcome of surgery.

What Did the Research Investigate?

The researchers wanted to understand the natural course of urinary function after robot-assisted laparoscopic radical prostatectomy.
 

They specifically examined:

• Urinary continence

• Lower urinary tract symptoms

• Quality of life related to urinary symptoms

• Changes over three, six and 12 months
   

The researchers also divided patients according to the severity of their urinary symptoms before surgery.
 

Patients with a preoperative International Prostate Symptom Score (IPSS) of:

• 0 to 7 were classified as having mild lower urinary tract symptoms

• 8 to 35 were classified as having moderate to severe lower urinary tract symptoms

How Was the Study Conducted?

The researchers prospectively evaluated 100 consecutive men who underwent RLRP between May 2005 and December 2006.
 

The patients had clinically localised prostate cancer and were assessed before surgery and at:

• Three months

• Six months

• 12 months
   

Urinary symptoms were measured using the International Prostate Symptom Score (IPSS).
 

The researchers also used a quality-of-life score to assess how urinary symptoms affected patients' daily lives.
 

This prospective follow-up allowed the researchers to observe how urinary function changed during the first year after surgery.

What Is the International Prostate Symptom Score?

The International Prostate Symptom Score, or IPSS, is a questionnaire used to assess lower urinary tract symptoms.
 

It covers symptoms such as:

• Incomplete emptying

• Frequency

• Intermittency

• Urgency

• Weak urinary stream

• Straining

• Getting up at night to urinate
   

The score helps quantify the severity of urinary symptoms.
 

In the study, the researchers used the IPSS both before and after surgery to determine how symptoms changed.

What Did the Study Find About Urinary Continence?

One of the main findings was that continence improved progressively during the first year after surgery.
 

The proportion of men who achieved continence was:

These results show that some men who were not yet continent at three months subsequently regained urinary control during the following months.
 

The findings therefore support the importance of allowing time for postoperative urinary recovery.

What Does This Mean for Patients?

A patient who experiences urinary leakage during the early months after prostate surgery should not necessarily assume that the condition will remain permanent.
 

In this study, the proportion of patients achieving continence increased between three and 12 months.
 

However, these figures represent the specific patient population studied and should not be interpreted as a guarantee for an individual patient.
 

Recovery can vary according to factors including:

• Age

• Preoperative urinary function

• Surgical factors

• Overall health

• Recovery of the urinary sphincter and surrounding tissues

What Happened to Men Who Already Had Urinary Symptoms Before Surgery?

One of the more interesting findings was that men with moderate to severe lower urinary tract symptoms before surgery experienced substantial improvement after RLRP.
 

Their average IPSS was:

• 14.1 before surgery

• 5.2 at three months

• 3.0 at six months

• 2.9 at 12 months
   

The changes were both statistically and clinically significant at all three postoperative time points.
 

This means that men who had more significant urinary symptoms before surgery generally reported considerably fewer symptoms after the operation.

What About Quality of Life?

The researchers also observed improvement in quality-of-life scores among patients with moderate to severe pre-existing urinary symptoms.
 

Their average quality-of-life score changed from:

• 3.4 before surgery

• 2.1 at three months

• 1.6 at six months

• 1.6 at 12 months
   

The improvement was statistically and clinically significant throughout the postoperative follow-up period.
 

This suggests that the changes were not limited to questionnaire scores but were also reflected in how patients perceived the effect of urinary symptoms on their daily lives.

What Happened to Men With Mild Urinary Symptoms?

Patients with mild lower urinary tract symptoms showed a different pattern.
 

The researchers did not find a statistically significant improvement in IPSS at three or six months.
 

However, by one year after surgery, there was a statistically significant improvement in their urinary symptom scores, with a p-value of 0.04.
 

This indicates that improvement in urinary symptoms may occur at different rates depending on the patient's preoperative symptom severity.

Why Might Men With More Severe Symptoms Improve After Prostate Surgery?

The study was not designed to establish the exact mechanism behind this finding.
 

However, the authors discussed the possibility that removing the prostate and relieving bladder outlet obstruction may contribute to improvement in pre-existing lower urinary tract symptoms.
 

This is particularly relevant because some men with prostate cancer may also have urinary symptoms related to prostate enlargement or bladder outlet obstruction.
 

It is important not to assume that prostatectomy will improve urinary symptoms in every patient, as individual outcomes can differ.

What Does Urinary Recovery Look Like Over Time?

The study demonstrates that urinary recovery after robotic prostate surgery is gradual.
 

A simplified representation of the study's continence findings is:
 

Three months: 82% achieved continence
Six months: 87% achieved continence
Twelve months: 91% achieved continence
 

The improvement between each stage illustrates why postoperative urinary function should be assessed over time rather than judged solely during the early recovery period.

Does Robot-Assisted Surgery Guarantee Continence?

No.
 

Although the study found that 91% of patients had achieved continence by 12 months, 9% had not achieved continence at that point.
 

The study therefore does not support the idea that robotic prostatectomy guarantees urinary continence.
 

Urinary recovery can vary between individuals, and the study was conducted at a single institution during the early development of the robotic approach.

What Factors Can Affect Continence Recovery?

Urinary continence after prostatectomy can be influenced by multiple factors.
 

These may include:

• Preoperative urinary function

• Patient age

• Prostate characteristics

• Surgical technique

• Preservation of urinary structures

• Pelvic floor function

• Individual healing
   

The authors noted that continence recovery after radical prostatectomy can vary according to preoperative patient characteristics, surgeon experience and surgical techniques used to preserve continence.

What Can Patients Expect During Early Recovery?

Patients should understand that urinary leakage can occur after the urinary catheter is removed.
 

During early recovery, some men may experience leakage when:

• Coughing

• Sneezing

• Standing up

• Walking

• Exercising
   

This is commonly referred to as stress urinary incontinence.
 

The severity and duration vary between patients.
 

Pelvic floor rehabilitation may form part of postoperative management, depending on the treating team's recommendations.

Why Is Follow-Up Important After Prostate Surgery?

Regular follow-up allows the medical team to assess:

• Urinary continence

• Lower urinary tract symptoms

• Quality of life

• Cancer-related outcomes

• Recovery progress
   

If urinary leakage persists, the treating team can determine whether further evaluation or additional treatment is appropriate.

Does the Research Mean Prostate Surgery Improves Urinary Symptoms?

The findings suggest that, in this particular cohort, urinary symptoms improved after RLRP, particularly among men who had moderate to severe lower urinary tract symptoms before surgery.
 

However, the study was observational and was not designed to prove that prostate removal itself caused every improvement.
 

The findings should therefore be interpreted as the observed pattern of urinary recovery among the men studied.

What Are the Limitations of the Research?

Understanding the limitations is important when interpreting the results.

Single-Institution Study

All 100 patients were treated at a single institution in Singapore.
 

Outcomes may differ between hospitals, surgeons and patient populations.

Relatively Small Patient Cohort

The study included 100 men.
 

Although prospective, this is a relatively modest sample for establishing predictors of outcomes across a broad population.

Early Robotic Surgery Experience

The procedures were performed between 2005 and 2006, during an earlier period of robotic prostatectomy development.
 

Surgical techniques and perioperative care have evolved since then.

Functional Outcomes Were Self-Reported

IPSS and quality-of-life assessments rely on patient-reported symptoms.
 

Although these questionnaires are established measures, they represent patients' experiences rather than direct physiological measurements.

What Can Patients Learn From This Research?

The study provides several useful points for men considering robotic radical prostatectomy.

Urinary recovery often takes time

Continence increased from 82% at three months to 91% at 12 months in the study population.

Pre-existing urinary symptoms do not necessarily predict poor recovery

Men with moderate to severe lower urinary tract symptoms actually experienced significant improvements in IPSS and quality of life after surgery.

Recovery can differ according to baseline symptoms

Men with mild symptoms did not show significant IPSS improvement until the one-year assessment.

Early postoperative leakage does not necessarily represent the final outcome

Because continence continued to improve throughout the first year, early urinary leakage should be considered within the broader recovery timeline.

Individual outcomes vary

The study's figures describe a specific cohort and should not be used as a guarantee for an individual patient.
 

A prospective Singapore study followed 100 men undergoing robot-assisted laparoscopic radical prostatectomy and examined urinary function over the first year after surgery.
 

The study found that 82% of patients achieved continence at three months, 87% at six months and 91% at 12 months. Men who had moderate to severe lower urinary tract symptoms before surgery experienced significant improvements in both urinary symptoms and quality of life throughout the follow-up period. Men with mild pre-existing symptoms showed significant symptom improvement at one year.
 

The findings demonstrate that urinary recovery after robotic prostate surgery can continue for months after the operation. They also suggest that men with pre-existing urinary symptoms may experience improvement rather than necessarily experiencing worsening urinary function after surgery.
 

However, the study was conducted at a single institution with 100 patients during an earlier period of robotic prostatectomy. Its findings should therefore be viewed as evidence describing the recovery pattern in this cohort rather than a guarantee of outcomes for every patient.
 

Men considering robotic radical prostatectomy should discuss expected urinary recovery, continence management and individual risk factors with their urologist before surgery.

Research Reference

Wang L, Chung SF, Yip SK, Lau WK, Cheng CW, Sim HG. The natural history of voiding function after robot-assisted laparoscopic radical prostatectomy. Urologic Oncology. 2011 Mar-Apr;29(2):177-182. Epub 2009 Apr 11. DOI: 10.1016/j.urolonc.2009.01.030. PMID: 19362862.
 

This article is for general information only and should not replace medical advice from a qualified healthcare professional.