Center for Nutrition, Boston Children's Hospital, Boston, Massachusetts, USA.
JPEN J Parenter Enteral Nutr. 2020 Aug;44(6):1140-1143. doi: 10.1002/jpen.1788. Epub 2020 Feb 4.
Blenderized formula (BF) can be used in place of standard enteral formula and is composed of blenderized whole foods and purees. Benefits of using BF include reduced vomiting and retching, in part related to a higher viscosity. Commercially prepared BFs vary significantly in viscosity when comparing available products. Viscosity can be measured using a viscometer, although this requires expensive and sophisticated equipment. We proposed an alternative method to describe viscosity of BFs using the International Dysphagia Diet Standardisation Initiative (IDDSI) framework. This flow test provides a simple and objective method to describe liquid thickness and requires only a 10-mL luer tip syringe and stopwatch.
Full-strength BFs were measured using the IDDSI flow test and compared with a standard enteral formula. BFs were then diluted until a slightly thick viscosity was achieved, which correlated to the viscosity of the reference formula.
IDDSI flow-test results indicated that undiluted BFs ranged in viscosity, from slightly thick to extremely thick, when measured at room temperature. The volume of water required to achieve a slightly thick viscosity ranged from 0 to 270 mL per serving, resulting in a wide variation in dilution of formula.
The IDDSI flow test was simple to perform and can serve as a tool to determine the viscosity of BFs.
可将匀浆配方（Blenderized formula，BF）替代标准肠内配方，由匀浆的全食物和泥状食物组成。使用 BF 的益处包括减少呕吐和恶心，部分原因是其具有更高的粘性。市售的 BF 在粘性方面存在显著差异，不同产品之间差异较大。可使用黏度计测量粘性，但这需要昂贵且复杂的设备。我们提出了一种使用国际吞咽障碍饮食标准化倡议（International Dysphagia Diet Standardisation Initiative，IDDSI）框架来描述 BF 粘性的替代方法。该流动测试提供了一种简单而客观的方法来描述液体厚度，仅需要 10 毫升鲁尔尖端注射器和秒表。
使用 IDDSI 流动测试测量全强度 BF，并与标准肠内配方进行比较。然后将 BF 稀释，直到达到略微粘稠的状态，这与参考配方的粘性相对应。
IDDSI 流动测试结果表明，在室温下测量时，未稀释的 BF 的粘性范围从略稠到极稠。达到略稠粘性所需的水量每份从 0 到 270 毫升不等，导致配方的稀释度差异很大。
IDDSI 流动测试易于操作，可以作为确定 BF 粘性的工具。
