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Cable-driven flexible endoscope utilizing diamond-shaped perforations: FlexDiamond 59
Table 3.5: (Continued)

Related methods of
Testing subjects testing Acceptance criteria Results after testing
Weak guidance of Functionality tests Endoscope did not touch the Endoscope did not touch
the tube (conical flask walls of the conical flask the walls of the conical
experiment) while traveling to the flask while traveling to the
nasopharynx region nasopharynx region

Tango Vero as a Substitute for Polyurethane is able to Time taken for
substitute for polyurethane using withstand load for a more polyurethane to break is
polyurethane Tango Vero extended period of time more than twice that of
(cyclic stability) Tango Vero
Biocompatibility of ISO-10993, “Biological Test not conducted
materials used Evaluation of Medical
(polyurethane) Prototypes Part 1:
Evaluation and Testing”

3.5 Design specifications, review, and benchmarking

The user specifications (US) aim to tackle the unmet needs of the current nasopharyngoscopes
by developing a prototype that meets the clinical needs (Table 3.6). This US part translates the
consumers’ needs into a list of ideal technical specifications or metrics (Table 3.7).
FlexDiamond then utilizes these target specifications set to develop the ideal prototype. In
addition, this need-metrics matrix (Table 3.8) serves as a guideline for prototype developers to
refer to while reviewing and refining the technical specifications of the prototype.

3.5.1 Clinical needs

3.5.2 Metrics

Table 3.6: Identification of needs tabulated according to their importance with 1 being the most
important and 5 being the least important.
Need no. Customer need Importance (1 5)
1 Wide viewing angle 1
2 High steerability 1
4 User-friendly 1
5 Safe for prolonged usage 1
6 Home-based 2
7 Subject self-administered 2
8 Comfortable 3
9 Affordable 4