BACKGROUND: Multimodal therapy is used increasingly in advanced gastrointestinal tumors. Potential benefits of using an intraoperative adjuvant therapy during laparoscopy for cancer have been documented in animal studies. The aim of this study was to develop a device that could deliver such an intraoperative drug therapy. METHODS: We developed a micropump suitable for minimally invasive surgery procedures that allowed microdroplets of therapeutic substance to be distributed into the pneumoperitoneum (CO2), creating a "therapeutic pneumoperitoneum." A closed-loop control system regulates drug delivery according to the gas flow. In vitro, the micropump is able to aerosolize various aqueous and ethanol solutions, including cytostatic and bacteriostatic drugs and adhesion-modulating agents. The size of the microdroplets has been optimized to prevent visual artifacts. RESULTS: The micropump was tested in an animal model (pig). The system was inserted into a 5-mm trocar. After insufflation of a 12-mm CO2 pneumoperitoneum, laparoscopic sigmoid colon resections could be performed with no special difficulties. No fog developed, and no system-related complication was observed. At autopsy, the active principle was distributed to all exposed peritoneal surfaces. CONCLUSIONS: As opposed to conventional peritoneal washing, therapeutic pneumoperitoneum reaches the entire peritoneal surface, allowing an optimal drug distribution. Drug diffusion into the tissues is enhanced by the intraperitoneal pressure. Precise determination of the instantaneous and total drug quantity is possible. Therefore, this drug delivery system has several advantages over conventional irrigation. Its potential domains of application are locoregional cancer therapy, prevention of port-site recurrences, immunomodulation, analgesia, peritonitis, and prevention of postoperative adhesions.
BACKGROUND: Multimodal therapy is used increasingly in advanced gastrointestinal tumors. Potential benefits of using an intraoperative adjuvant therapy during laparoscopy for cancer have been documented in animal studies. The aim of this study was to develop a device that could deliver such an intraoperative drug therapy. METHODS: We developed a micropump suitable for minimally invasive surgery procedures that allowed microdroplets of therapeutic substance to be distributed into the pneumoperitoneum (CO2), creating a "therapeutic pneumoperitoneum." A closed-loop control system regulates drug delivery according to the gas flow. In vitro, the micropump is able to aerosolize various aqueous and ethanol solutions, including cytostatic and bacteriostatic drugs and adhesion-modulating agents. The size of the microdroplets has been optimized to prevent visual artifacts. RESULTS: The micropump was tested in an animal model (pig). The system was inserted into a 5-mm trocar. After insufflation of a 12-mm CO2 pneumoperitoneum, laparoscopic sigmoid colon resections could be performed with no special difficulties. No fog developed, and no system-related complication was observed. At autopsy, the active principle was distributed to all exposed peritoneal surfaces. CONCLUSIONS: As opposed to conventional peritoneal washing, therapeutic pneumoperitoneum reaches the entire peritoneal surface, allowing an optimal drug distribution. Drug diffusion into the tissues is enhanced by the intraperitoneal pressure. Precise determination of the instantaneous and total drug quantity is possible. Therefore, this drug delivery system has several advantages over conventional irrigation. Its potential domains of application are locoregional cancer therapy, prevention of port-site recurrences, immunomodulation, analgesia, peritonitis, and prevention of postoperative adhesions.
Authors: C Bloechle; A Emmermann; T Strate; U J Scheurlen; C Schneider; E Achilles; M Wolf; D Mack; C Zornig; C E Broelsch Journal: Surg Endosc Date: 1998-03 Impact factor: 4.584
Authors: D S Alberts; P Y Liu; E V Hannigan; R O'Toole; S D Williams; J A Young; E W Franklin; D L Clarke-Pearson; V K Malviya; B DuBeshter Journal: N Engl J Med Date: 1996-12-26 Impact factor: 91.245
Authors: D B Jones; L W Guo; M K Reinhard; N J Soper; G W Philpott; J Connett; J W Fleshman Journal: Dis Colon Rectum Date: 1995-11 Impact factor: 4.585
Authors: Rafael Seitenfus; Antonio Nocchi Kalil; Eduardo Dipp de Barros; Claudio Galeano Zettler; Gabriel Oliveira Dos Santos; Olivier Glehen; Carlos Humberto Cereser Junior; Paulo Roberto Walter Ferreira Journal: Surg Endosc Date: 2019-08-01 Impact factor: 4.584
Authors: Linda Feldbrügge; Felix Gronau; Andreas Brandl; Timo Alexander Auer; Alan Oeff; Peter Thuss-Patience; Johann Pratschke; Beate Rau Journal: Front Oncol Date: 2021-04-12 Impact factor: 6.244
Authors: Wiebke Solass; Aurélie Herbette; Tina Schwarz; Alexander Hetzel; Jian-Sheng Sun; Marie Dutreix; Marc A Reymond Journal: Surg Endosc Date: 2011-11-01 Impact factor: 4.584
Authors: Wiebke Solass; Reinhold Kerb; Thomas Mürdter; Urs Giger-Pabst; Dirk Strumberg; Clemens Tempfer; Jürgen Zieren; Matthias Schwab; Marc André Reymond Journal: Ann Surg Oncol Date: 2013-09-05 Impact factor: 5.344