Page 318 - Control Theory in Biomedical Engineering

292 Control theory in biomedical engineering

Anatomical Design
Parameters restrictions specifications Comments
Diameter Should ideally be 3.92mm Parameter met with
(outer) less than 10mm 2mm of space
Data collected between device and
was based on lumen on each end
Caucasians,
should be
adjusted to 8mm
Diameter 3.9mm The diameter of the
(inner) camera is 3.9mm,
too large for the
aluminum tube.
Further
improvements can
be made to use a
smaller version of
the IntroSpicio
camera instead
Insertion Minimum of 8.5mm Parameter not met,
length 100mm but still sufficient to
Length of capture more than
workspace 80% of the nasal
in region cavity
(sagittal) Improvements can
be made to lengthen
the flexible tip
Bending 145 Parameters met
angle
(degrees)
Control Further improvements
system will be made to
contain the control
system and improve
the portability of the
device

2.2 Overall design

Our device in Fig. 1 encompasses the traits of a flexible nasopharyngoscope,
which includes a small diameter of 3mm and a high deflection angle of
145degrees (Table 1). Both the diameter and deflection angles are compa-
rable to those that are commercially available.