1. ASSESSMENT OF SUPPORT SURFACES (STATIC & MIXED) FOR NEONATES M. M. Sánchez-Lorente 1 ; P. García-Molina 2-3 ; C. Vergara-Hernández 2 ; E. Sanchis-Sánchez 2 ; J. Martos-Torres 2 ; A. Álvarez-Ordiales 4 ; & E. Balaguer-López 2-3 FP-50002 EWMA/GNEAUPP 2014 1.Conselleria de Sanitat, Valencia (SPA). 2.University of Valencia, Valencia (SPA). 3.Hospital Clínico Universitario, Valencia (SPA). 4.Hospital Universitari i Politècnic “La Fe”, Valencia (SPA). Presenting author: Mr. Pablo García-Molina

2. Background FP-50002 EWMA/GNEAUPP 2014 Existence of several neonatal support surfaces Lack of evaluation Interface pressure & pressure redistribution Efficacy in the prevention or treatment of PU however… regarding…

3. Aim FP-50002 EWMA/GNEAUPP 2014 To assess the interface pressure and pressure redistribution of five devices of constant low pressure (static and mixed support surfaces). 1 5 2 4 3

4. Methods FP-50002 EWMA/GNEAUPP 2014 Study design Laboratory study with repeated measures design. Sample Eight neonatal simulation dummies with different characteristics regarding head circumference, weight and height.

5. Methods FP-50002 EWMA/GNEAUPP 2014 Support devices Visc-TVisc-WhiteVisc-GrayVisc-BluePol-3D Structure Viscoelastic “T” units Viscoelastic Block Viscoelastic Block Viscoelastic Block Polyester filaments Layers12221 Density (Kg/m 3 )5050/50 40NA Hardness (Kpa)1.61.01/51.01/3.62.5NA Compression factor22/2 -NA

6. Methods FP-50002 EWMA/GNEAUPP 2014 Variables Mean pressure (mmHg). Maximum pressure (mmHg). Mean pressure in head region (mmHg). Area of contact (cm 2 ). Equipment XSENSOR X3 PX100:40.40.002 device. Procedure See: E-poster no. 50006.

7. Methods FP-50002 EWMA/GNEAUPP 2014 Statistical analysis Descriptive statistics. Due to a small sample size, a non-parametric test (Friedman test) was carried out to assess differences among groups. If a significant difference was found, post hoc comparisons among groups were performed using the Wilcoxon- Nemenyi-McDonald-Thompson test. The analysis was carried out by means of the R environment (The R Foundation for Statistical Computing). Data set and code employed for the analysis can be found at www.figshare.com (*). www.figshare.com *http://dx.doi.org/10.6084/m9.figshare.977866

8. Results FP-50002 EWMA/GNEAUPP 2014 Visc-TVisc-WhiteVisc-GrayVisc-BluePol-3D Mean pres., x̅ (SD)16.26 (2.77)17.51 (3.32)18.12 (3.32)17.11 (3.07)17.82 (2.58) Max. pres., x̅ (SD)24.58 (7.39)26.79 (8.88)28.15 (7.91)25.49 (7.55)27.53 (6.12) Head pres., x̅ (SD)17.25 (3.37)18.58 (4.17)19.53 (4.45)17.95 (3.71)18.7 (2.92) Area, x̅ (SD)19.29 (11.29)22.11 (12.13)22 (9.75)23.52 (13.21)29.23 (12.46) Lowest values! Highest values!

9. Results FP-50002 EWMA/GNEAUPP 2014 Friedman test χ2χ2 DfP-value Mean pres., x̅ (SD) 14,340,006 Max. pres., x̅ (SD) 11,240,02 Head pres., x̅ (SD) 8,740,07 Area, x̅ (SD) 18,514< 0,001

10. Results FP-50002 EWMA/GNEAUPP 2014 Row-ColumnVisc-TVisc-WhiteVisc-GrayVisc-BluePol-3D Visc-T----- Visc-White0,24---- Visc-Gray0,0050,61--- Visc-Blue0,710,930,17-- Pol-3D0,0560,970,930,61- Post hoc analysis: mean pressure (p-value)

11. Results

12. FP-50002 EWMA/GNEAUPP 2014 Row-ColumnVisc-TVisc-WhiteVisc-GrayVisc-BluePol-3D Visc-T----- Visc-White0,32---- Visc-Gray0,0140,71--- Visc-Blue0,88 0,17-- Pol-3D0,3210,710,88- Post hoc analysis: maximum pressure (p-value)

13. Results

14. FP-50002 EWMA/GNEAUPP 2014 Row-ColumnVisc-TVisc-WhiteVisc-GrayVisc-BluePol-3D Visc-T----- Visc-White0,71---- Visc-Gray0,950,98--- Visc-Blue0,270,950,71-- Pol-3D< 0,0010,0530,010,27- Post hoc analysis: pressure area (p-value)

15. Results

16. Conclusion The “T” device presents the best values of pressure relief. The polyester fiber device presents the best values of pressure redistribution.  Adding an upper layer of polyester fiber to the “T” device could result in a better support surface.  Next step: studying the properties of the new support surface in healthy subjects under clinical conditions.