جستجوی مقالات مرتبط با کلیدواژه "hydrocolloid" در نشریات گروه "پزشکی"

There are numerous dressings used to treat pressure ulcers (PUs), depending on their advantages to achieve optimum patient outcomes. This study aimed to compare hydrocolloid dressings and silver nanoparticles in treating PUs among patients with spinal cord injury (SCI).

This randomized clinical trial was conducted on 70 patients with SCI in Iran. Participants were randomly divided into two equal groups (n=35) receiving silver nanoparticle dressing and hydrocolloid dressing, respectively. The groups were evaluated in four assessment periods using the Bates-Jensen Wound Assessment Tool (BWAT). Data analysis was performed using SPSS software version 13, repeated measures ANOVA, non-parametric tests, and chisquare.

Chi-square test was used to investigate the difference between the scores before the intervention, the results of which were not statistically significant. In repetitive measurements, the results of the analysis of variance showed that the average assessment score in both groups decreased and both dressings were effective in the treatment process. Although PU improvement status in the group that received silver nanoparticles was better, between-group analysis of variance did not show any statistically significant difference between the two groups.

Our results indicated that silver nanoparticles and hydrocolloid dressings can be used interchangeably in the treatment of PUs.

The objective of this study was to investigate the effect of different thermal treatments (20-100°C at five levels for 20 min) on rheological properties of basil seed (Ocimum basilicum) and balangu seed (Lallemantia royleana) gums. Power law model well described the non-Newtonian pseudoplastic behaviour of the seeds gums. The apparent viscosity of balangu seed gum was dramatically affected by the temperature and decreased from 0.015 to 0.007 Pa.s with increasing temperature from 20 to 100°C (at 97.8 s-1). Apparent viscosity of basil seed gum decreased from 0.053 to 0.022 Pa.s with increasing temperature from 20 to 100°C (shear rate=97.8 s-1). Seeds gums showed shear thinning behavior at all temperatures. The Arrhenius relationship was used to describe the temperature dependency of rheological parameters of basil seed and balangu seed gums. The activation energy of basil seed and balangu seed gums was quantified using an Arrhenius equation and increased from 4297 to 17434 J mol-1 and 2210 to 11257 J mol-1 as shear rate changed from 6.12 to 245 s-1, respectively. The flow behavior index (n), that is related to non-Newtonian behavior (pseudoplasticity),increased significantly (P≤0.05) in basil seed gum after heating, however it was decreased significantly (P≤0.05) in balangu seed gum after heating.