How well does ISO 11948-1 (the Rothwell method) for measuring the absorption capacity of incontinence pads in the laboratory correlate with clinical pad performance

User perspectives, preferences and priorities relating to products for managing bladder and bowel dysfunctions

A great many people of all ages around the world cannot fully control their bladder or bowel, or both. Either in the short or long term, they rely upon products and devices to manage the emptying of their bladders and bowels and to collect, absorb and contain leaked urine or faeces. The incontinence product market is large and growing, and ongoing developments in materials and technologies should lead to improvements in these products and devices. Engineers and designers who work in this field - or who plan to do so - need to recognise the breadth of factors that affect the effectiveness and acceptability of products. The primary functions of products for managing bladder and bowel dysfunctions are the collection and containment of urine or faeces - and the associated engineering and design challenges may be considered in terms of flow rates and volumes and methods of acquisition and containment. But products will fail if they do not take into account other factors, some of which relate less directly to these primary functions and some not at all. This article aims to highlight the product characteristics that are most important to the people who use them, and areas where user-centred innovation and development may lead to improvements.

EFFECTIVENESS OF DIAPERS AMONG PEOPLE WITH CHRONIC INCONTINENCE IN THAILAND

OBJECTIVES

The aim of this study was to assess effect of adult diapers on health-related quality of life (HRQOL) and the independent level of performing activities of daily living (ADLs) in people with urinary or fecal incontinence. Psychological consequences of patients' caregivers were also measured.

METHODS

This quasi-experimental study was conducted at two rehabilitation centers in Thailand. People aged 15 years or greater with chronic urinary or fecal incontinence were eligible. Study participants received adult diapers for 10 weeks after recruitment. Thai EuroQol Five Dimensions (EQ-5D) and the Barthel Index were measured at baseline and weeks 2, 6, and 10 to evaluate HRQOL and the independent level of performing ADLs, respectively. The Braden Scale was used to assess the risk of having pressure ulcers. Mean differences in the Thai EQ-5D, the Barthel Index, and the Braden Scale, before and after receiving adult diapers, were estimated using a multilevel linear regression model.

RESULTS

There were ninety patients and forty-eight caregivers who took part in this study. HRQOL and independent level of performing ADLs had improved significantly by week 10 after receiving adult diapers with mean differences of 0.102 (95% confidence interval [CI], 0.046-0.158) and 4.40 (95% CI, 1.74-7.07), respectively. The risk of having pressure ulcers had significantly decreased by 67 percent (95% CI, 16 percent-78 percent) by week 10 after receiving adult diapers.

CONCLUSIONS

The results indicate a significant improvement of HRQOL and the independent level of performing ADLs among incontinent patients after receiving adult diapers. These results were used to inform the development of the health benefits package under the Universal Health Coverage Scheme in Thailand.

A critical investigation of ISO 11948-2 and ISO 11948-1 for predicting the leakage performance of small disposable incontinence pads for lightly incontinent women

ISO 11948-2--an international standard laboratory method developed to predict the leakage performance of small disposable pads for lightly incontinent women--was investigated. The repeatability and reproducibility (precision within and between laboratories, respectively) of two variants on the method were found to be poor. The coefficient of variation for each method variant in each laboratory (two laboratories ran each variant) was higher than 40% for about half the 12 products evaluated. Results differed by up to 94% between laboratories for a given product. The ability of the method to predict the leakage performance of pads was investigated by measuring correlations between the clinical evaluations of the 12 products, and technical evaluations using ISO 11948-2. Correlations were very weak (r < or= 0.487). Accordingly, it is recommended that 11948-2 is withdrawn. A second international standard method (ISO 11948-1)--developed for evaluating large pads, but sometimes used on small ones--was also investigated. Correlations between the clinical evaluations of the 12 products and technical evaluations using ISO 11948-1 were weak (r < or = 0.560). Accordingly, it is recommended that ISO 11948-1 is not used for evaluating small disposable bodyworn pads for women.