TY - JOUR
T1 - EXPERIMENTAL INVESTIGATION OF ENDOSCOPIC CELL SPRAY
AU - Bieber, Malte
AU - Thiebes, Anja Lena
AU - Cornelissen, Christian Gabriel
AU - Jockenhoevel, Stefan
AU - Kneer, Reinhold
AU - Reddemann, Manuel Armin
PY - 2017
Y1 - 2017
N2 - Stem cell therapy requires high local concentration of living cells at the area of treatment. An innovative approach aims at high local cell concentrations in hollow organs by application of cells through flexible endoscopy. The endoscope's working channel is equipped with a catheter nozzle for coaxial liquid atomization of cell suspensions. Until now, little information is available regarding the influence of atomization parameters on cell survival and the influence of cells in solution on atomization. Therefore, a parametric study on atomization of cell suspensions is performed in this work. The mutual interaction of cells and atomization is experimentally analyzed, aiming at a correlation between air Reynolds number, droplet sizes, and cell survival rates. The influences of catheter flow, atomization, and droplet wall interaction on cell survival are quantified and thus the extensional flow during ligament formation is identified as main cell destruction mechanism. On the basis of the present endoscopic configuration, integral cell survival rates above 80% are achieved. Thus, it offers the opportunity for homogeneous local distribution of cells in hollow cavities.
AB - Stem cell therapy requires high local concentration of living cells at the area of treatment. An innovative approach aims at high local cell concentrations in hollow organs by application of cells through flexible endoscopy. The endoscope's working channel is equipped with a catheter nozzle for coaxial liquid atomization of cell suspensions. Until now, little information is available regarding the influence of atomization parameters on cell survival and the influence of cells in solution on atomization. Therefore, a parametric study on atomization of cell suspensions is performed in this work. The mutual interaction of cells and atomization is experimentally analyzed, aiming at a correlation between air Reynolds number, droplet sizes, and cell survival rates. The influences of catheter flow, atomization, and droplet wall interaction on cell survival are quantified and thus the extensional flow during ligament formation is identified as main cell destruction mechanism. On the basis of the present endoscopic configuration, integral cell survival rates above 80% are achieved. Thus, it offers the opportunity for homogeneous local distribution of cells in hollow cavities.
KW - cell spray
KW - coaxial atomization
KW - cell survival
U2 - 10.1615/AtomizSpr.2017020134
DO - 10.1615/AtomizSpr.2017020134
M3 - Article
SN - 1044-5110
VL - 27
SP - 847
EP - 858
JO - Atomization and Sprays
JF - Atomization and Sprays
IS - 10
ER -