Intraocular Pressure During Robotic Assisted Laparoscopic Procedures Utilizing Steep Trendelenburg Positioning
|Study Design:||Observational Model: Case Control
Time Perspective: Prospective
|Official Title:||Intraocular Pressure During Robotic Prostatectomy, Laparoscopic Surgery, and Open Exploratory Laparotomy|
- Effect of radical prostatectomy technique on intraocular pressure. [ Time Frame: 30 days post surgical procedure. ]
|Study Start Date:||December 2008|
|Study Completion Date:||May 2010|
|Primary Completion Date:||May 2010 (Final data collection date for primary outcome measure)|
Robotic laparoscopic prostatectomy
Patients who are undergoing primary surgical treatment for a diagnosis of prostate operatively will be enrolled. IOP will be measured throughout the case to assess for change. The various techniques employed for a radical prostatectomy will be compared. Patients undergoing RRP (open surgery) will act as controls. Those undergoing LRP (minimally invasive surgery) will be compared with the control group to assess for differences in IOP that may result from the different approaches. three arms will be used for the comparison: open, laparoscopic intraperitoneal approach), and laparoscopic (extraperitoneal approach).
The National Cancer Institute estimates that 218,890 new cases of prostate cancer will have been diagnosed in 2007. The three most commonly chosen options for localized prostate cancer are radical prostatectomy (RP), external radiation therapy (XRT), and interstitial brachytherapy (BT). A variety of surgical approaches are available, including open, laparoscopic, and robotic prostatectomy. With the current trend towards "minimally invasive" techniques, laparoscopic prostatectomy (LP) and, in particular, robotic assisted LP are on the rise. Since gaining FDA approval in 2001, the robotic procedure has gained over 1/3 of the market share. Preliminary data suggests this number may now have grown to over 50% of all prostatectomies for cancer performed in the United States.
The minimally invasive procedures offer some advantages relative to the open alternative: smaller incisions, improved pain control, decreased blood loss, and faster recovery have been well documented. Cancer specific and quality of life (sexual function, continence) outcomes will need more long term evaluation before definitive advantages with the minimally invasive techniques are stated. Furthermore, there are potential risks with these minimally invasive methods that have not been fully elucidated.
During a laparoscopic or robotic prostatectomy, patients are subjected to a marked Trendelenberg position throughout the majority of the procedure. The effect of body positioning has been shown previously to affect intraocular pressure (IOP). However, the effect of surgical positioning on IOP during prostatectomies has not been well studied and is not definitively known. Anecdotal reports of postoperative vision loss following robotic assisted laparoscopic prostatectomy have surfaced thus further research is required to study the effect that these procedures for prostate cancer may have on IOP and vision.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01261871
|United States, California|
|United States Naval Medical Center|
|San Diego, California, United States, 92134-5000|
|Principal Investigator:||Brian K Auge, M.D.||United States Naval Medical Center, San Diego|