1.  The aim of this study is to enable the disabled to maintain the optimum sitting posture by analyzing maintenance of sitting posture and distribution of buttock pressure in accordance with the Postural support device(PSD) targeting the disabled with SCI. Woo-Sob Sim, C.P.O, Woo-Sung Seong, C.P.O, Dong-Young Ahn, C.P.O Hee-Seung Yang*, MD., Woo-Sub Kim†, MD. Center of Prosthetics and Orthotics, Veterans Health Service Medical Center, Seoul, Korea, Department of Rehabilitation Medicine, Veterans Health Service Medical Center, Seoul, Korea¹, Department of Physical Medicine & Rehabilitation, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea† Result  5 patients  Quadriplegia or paraplegia with experience of pressure ulcer and treatment has been completed  They have used wheelchair more than five hours a day  Measurement  Buttock pressure - Body Pressure Mapping System(BPMS)  Sitting posture - 2 digital cameras and Dartfish Teampro 6.0 program  Analyzed by paired t-test with SPSS ver. 12.0.  When a PSD was applied according to the result of this study, contact area increased and it decreased maximum pressure on a specific area of body by dispersing buttock pressure properly, tilt angle of head came close to a correct sitting posture.  Application of a PSD has a positive effect on wheelchair sitting posture and prevention of pressure ulcer for the disabled with SCI. Method Objective Discussion & Conclusion Fig 2. BPMS Ⓡ (Body Pressure Mapping System)(Tech Storm, Daejeon, Korea) Table 2. Parameters of buttock pressure according to the presence or absence of postural support device.(n=5) Table 3. Parameters of sitting posture in sagital plane according to the presence or absence of postural support device. (n=5) Table 4. Parameters of sitting posture in coronal plane according to the presence or absence of postural support device.(n=5)  Contact area ↑  160.4±31.50㎠ ° → 236.2±35.49 ( p = 0.037)  Hip joint flexion angle ↓  106.92±6.70° → 98.82±4.59° ( p = 0.037)  Tilt angle of head ↑  – 7.54±4.86° → – 2.97±3.93° ( p = 0.038) V MSCN Table 1. Characteristics of subjects Fig 1. Dartfish Teampro 6.0 Ⓡ (DARTFISH LTD, Fribourg, Switzerland) Result a Non SS, Non-Special Seating, b Fit SS, Fit-Special Seating, c Pmax(㎪), Maximum pressure, d Pmean(㎪), Mean Pressure, e Carea(㎠), Contact area a Non SS, Non-Special Seating, b Fit SS, Fit-Special Seating, c HDflex, Head flexion angle, d HPflex, Hip joint flexion angle, e KNflex, Knee joint angle a Non SS, Non-Special Seating, b Fit SS, Fit-Special Seating, c HDobli, Tilt angle of head, d SDobli, Tilt angle of shoulder, e PEobli, Tilt angle of pelvis a Non SS b Fit SSp c Pmax(㎪)43.764±15.9422.812±6.130.079 d Pmean(㎪)25.98±7.2020.144±1.340.168 e Carea(㎠)160.4±31.50236.2±35.490.037* a Non SS b Fit SSp c HDflex(°)151.34±9.47160.30±10.190.098 d HPflex(°)106.92±6.7098.82±4.590.037* e KNflex(°)100.00±7.4593.36±6.130.089 a Non SS b Fit SSp c HDobli(°)-7.54±4.86-2.97±3.930.038* d SDobli(°)2.00±3.120.40±2.000.077 e PEobli(°)-0.06±3.30-0.32±1.250.803 Demographic factor Sex (n)Male5 Age (years)51.6±14.36 Time since SCI (years)25.4±12.52 Injury level (n)Cervical (C4~C7)3 Thoracic (T1~T10)2 ASIA classification (N) A3 B1 C1 Body weight (kg)67.2±9.18 Daily sitting time (hour)7.6±1.82 Ulceration Preventing Cushion (UPC)PSD Email : cpo111@naver.com