Fig 1.
Existing devices and different transition scenarios.
(A): A legacy syringe is shown on top with the plunger of the syringe removed. At the bottom are three different legacy G-tubes currently in the U.S. market. All G-tubes have funnel type connectors. (B) An ISO 80369–3 compliant syringe is shown on top with the plunger of the syringe removed. At the bottom are three newer G-tubes with ISO 80369–3 compliant connectors. The inset shows a top view of the ISO 80369–3 compliant connector for two different designs. The numbering of devices in Fig 1 are for explanation purposes only and do not necessarily reflect the devices from our prior study [6].
Fig 2.
Computer aided and 3D printed designs.
(A) Shows the critical design parameters of the designs chosen. A: inlet tube diameter, B: length of the connector, C: length of the surrogate G-tube devices from where the connector ends to the distal end, D: outlet tube diameter. (B) SolidWorks designs of the six surrogate designs showing the internal passageways. All dimensions are in mm. (C) 3D printed D4 syringe-design combination is shown (not to scale).
Fig 3.
Normalized time required by each surrogate device design.
Time required by device normalized with the time required by D1 for six different fluids. The data are then grouped together for different diets with the same surrogate device.
Table 1.
Comparison of Osmolite with 10 cP g-w and Boost with 100 cP g-w.