CRMG operates a professional study centre where we systematically document and analyse oncological and functional outcomes from da Vinci treatments.

Scientific studies

In recent years, a number of scientific studies have been carried out to compare the advantages and disadvantages of different surgical techniques, ranging from open abdominal incisions, to keyhole surgery, to the da Vinci® technique. It has been emphatically demonstrated that robot-assisted surgery is clearly superior to the other techniques in terms of complication rates, blood loss and other statistical factors. Here we present a small selection of the latest research findings.

Robot-assisted, laparoscopic and open myoma enucleation

A comparative study, February 2011

Ehab E. Barakat (MD), Mohamed A. Bedaiwy (MD), Stephen Zimberg (MD), Benjamin Nutter, Mohsen Nosseir (MD), Tommaso Falcone (MD)

  Abdominal
(N=393)
Laparoscopy
(N=93)
Robot-assisted
(N=89)
Operative time (min.) 126 155 189
Myoma weight (g) 263,00 96,65 223,00 *
Blood loss (ml) 200 150 100 **
Drop in Hb (g/dl) 2,00 1,55 1,30 **
Length of hospital stay (days) 3 1 1 **

* Enucleation of larger myomas than with laparoscopy

** Less blood loss, smaller drop in Hb and shorter hospital stay with robot-assisted surgery


Endometrial cancer

Clinical data from Dr. John Boggess
University of North Carolina, Chapel Hill, NC

American Journal of Obstetrics & Gynecology, October 2008

  Open "RH"
(N=138)
Laparoscopic "RH"
(N=81)
da Vnci "RH"
(N=103)
Average age (years) 64,0 62,0 61,9
BMI (kg/m2) 34,7 29,0 32,9
Blood loss (ml) * 266,00 145,8 74,5
Operative time (min) 146,5 213,4 191,2
Mean hospital stay (days) * 4,4 1,2 1,0
Total number of lymph nodes (n) 14,9 23,1 32,9
-- pelvic lymph nodes (n) 11,5 17,4 20,5
-- paraaortic lymph nodes (n) 3,0 6,3 12
Complications (%) * 29,7 (41) 13,6 (11) 5,8 (6)
Conversion to laparotomy N/A 4,9 2,9

* Less blood loss, shorter hospital stay and fewer complications with robot-assisted surgery


RA radical hysterectomy

Perioperative and survival outcomes in patients with cervical cancer compared to laparoscopic and open radical surgery, June 2011

Gortchev G., Tomov S., Tantchev L., Velkova A., Radionova Z.

pT1b1 Wertheim
(n=175)
Laparoscopic Werthein
(n=46)
da Vinci Wertheim
(n=73)
P value
Mean age (years) 49,00 42,5 46,00 0,001
Operative time (min) 168,2 ± 31,1 232,1 ± 61,7 152,2 ± 26,5 0,001
Length of hospital stay (days) * 9,6 ± 1,0 4,8 ± 0,5 4,1 ± 0,7 0,001
Revisions * 25 (14,3%) 3 (6,5%) 1 (1,4%) 0,001
Disease-free survival rate * 77,4% ± 6,5% 91,5% ± 4,8% 95,8% ± 4,1% 0,019
Total survival rate * 84,9% 94,9% 100% 0,037

* Shorter hospital stay, fewer revisions and higher survival rates than for other procedures following da Vinci procedures