Fig. 1 The SW-SiStA2 design scheme ( a ) compared with the first-generation pneumatically powered SW-SiStA device [ 18 ] ( b ) More about this image found in The SW-SiStA2 design scheme ( a ) compared with the first-generation pneuma...

Fig. 2 Attaching the SW-SiStA2 to a user before use ( a ), assisting the user to stand up with the device ( b ), and the device folded after use to facilitate transportation ( c ) More about this image found in Attaching the SW-SiStA2 to a user before use ( a ), assisting the user to s...

Fig. 3 Gas spring structure More about this image found in Gas spring structure

Fig. 4 Inverted crank-slider mechanism of the gas spring-powered SW-SiStA2 More about this image found in Inverted crank-slider mechanism of the gas spring-powered SW-SiStA2

Fig. 5 Comparison of the gas spring-generated assistive torque versus the original (100%) and scaled (37%) bilateral knee torques in the SiSt process More about this image found in Comparison of the gas spring-generated assistive torque versus the original...

Fig. 6 Setup of the human testing of the SW-SiStA2 More about this image found in Setup of the human testing of the SW-SiStA2

Fig. 7 Comparisons of the EMG activation levels for ( a ) Subject #1, ( b ) Subject #2, and ( c ) Subject #3 (unassisted condition in red, assisted condition in blue, and the shaded regions represent ±1 SD). The RF, VL, and VM represent rectus femoris, vastus lateralis, and vastus medialis EMG sig... More about this image found in Comparisons of the EMG activation levels for ( a ) Subject #1, ( b ) Subjec...

Fig. 8 Comparisons of the of the joint angle trajectories of the ankle, knee, hip, and trunk for ( a ) Subject #1, ( b ) Subject #2, ( c )Subject #3 (unassisted condition in red, assisted condition in blue, and the shaded regions represent ±1 SD). (Color version online.) More about this image found in Comparisons of the of the joint angle trajectories of the ankle, knee, hip,...

Fig. 1 Mechanical structure design sketch: ( a ) stent and ( b ) retrieval system More about this image found in Mechanical structure design sketch: ( a ) stent and ( b ) retrieval system

Fig. 2 The schematic diagram of retrieval process of the stent: ( a ) move the retrieval system to the stent's near-end, ( b ) push the outer sheath to a desired position, ( c ) push and rotate the retrieval hook, and ( d ) pull the hook toward the stent's near-end More about this image found in The schematic diagram of retrieval process of the stent: ( a ) move the ret...

Fig. 3 The reference points in FEA model More about this image found in The reference points in FEA model

Fig. 4 Picture show of the retrieval platform and the stent More about this image found in Picture show of the retrieval platform and the stent

Fig. 5 The MPS field contour plots of different retrieving states: ( a ) the main body of the stent starts to contract, ( b ) half of the main body of the stent is retrieved, and ( c ) the whole stent is retrieved into the outer sheath More about this image found in The MPS field contour plots of different retrieving states: ( a ) the main ...

Fig. 6 Retrieval process of No. 2 stent: ( a ) the stent was captured by the retrieval hook and ( b ) half of the stent was retrieved into the outer sheath More about this image found in Retrieval process of No. 2 stent: ( a ) the stent was captured by the retri...

Fig. 7 The image of the retrievable stent and the tube structures of the stents under examination with a microscope: ( a ) the stent retrieved from the blood vessel, ( b ) the unfolded stent of No. 1, and ( c ) the unfolded stent of No. 2 More about this image found in The image of the retrievable stent and the tube structures of the stents un...

Fig. 8 The blood vessel image with HE staining: ( a ) normal blood vessel, ( b ) blood vessel implanted with No. 1 stent, and ( c ) blood vessel implanted with No. 2 stent More about this image found in The blood vessel image with HE staining: ( a ) normal blood vessel, ( b ) b...

Fig. 9 The blood vessel image with EVG staining: ( a ) normal blood vessel, ( b ) blood vessel implanted with No. 1 stent, and ( c ) blood vessel implanted with No. 2 stent More about this image found in The blood vessel image with EVG staining: ( a ) normal blood vessel, ( b ) ...

Fig. 10 The blood vessel image with CD 34 staining: ( a ) normal blood vessel, ( b ) blood vessel implanted with No. 1 stent, and ( c ) blood vessel implanted with No. 2 stent More about this image found in The blood vessel image with CD 34 staining: ( a ) normal blood vessel, ( b...