Impact of viscosity on tube clogging incidence in straight vs right‐angle tube feeding extension sets: An in vitro study

Abstract Background Blenderized tube feeding (BTF) use has increased in patient populations requiring enteral nutrition support, and healthcare providers need to be well‐informed on the nuances of BTF—including administration. Patients and caregivers frequently prefer right‐angle extension sets but are encouraged to use straight sets to avoid a potential clog at the right angle. The purpose of this study was to compare clog occurrences in straight and right‐angle extension tubes between standard commercial formula (SCF) and all viscosity levels of BTF. The accuracy of formula volume delivered was also explored. Methods A home‐prepared and a commercial product were manipulated such that all four viscosity levels were achieved and delivered by pump and syringe through right‐angle and straight extension sets in mock tube feedings. A comparison SCF was also delivered via pump without adjusting the viscosity. All 1‐h feedings were observed for any clogs at the right‐angle or in the straight extension set. Results No clogs were observed at any viscosity level in pump delivery for right‐angle or straight extension sets. One clog was observed in a single‐observation syringe feeding. The volume delivered was more consistent at all viscosity levels through the right‐angle sets, compared with straight set tubes delivering the 200‐ml volume in 1 h. Conclusion Patient preference for right‐angle extension sets may be honored for BTF delivered via new‐generation feeding pumps.