TETS: ASAIO Journal Article 1999
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Transcript of TETS: ASAIO Journal Article 1999
TETS: ASAIO Journal Article 1999
• Internal Battery Backup - Lithium Ion Power
• Power:• 20 W (η = 84%)• 34 W (η = 71%)
• Consumption of battery @ 20W - 62min
• Benefits: very little loss of flux, stable operation, high transmission efficiency
TETS Safety• The power of electromagnetic wave absorbed by tissue
per unit mass of 1 kg is used to evaluate the thermal effect (SAR)
• Previous device: SAR = 0.3 W/kg @40 W• Safety level: SAR = 8 W/kg
• Established by the Ministry of Public Management, Home Affairs, Posts and Telecommunications of Japan.
• Tested on a goat with 20-40 W transmitted continuously for 4 months
• No negative effects on the goat tissue
• http://www.natureinterface.com/e/ni03/P081-082/• Nature Interface Quarterly Magazine (Japanese)
TETS: ASAIO Journal Article 1993• Maximum power output:
– 60W @ 5mm (η = 75-80%)– 45W @ 15mm (η = 75-80%)
• Induction coils: must be placed closely together and orientated correctly
• Uses frequencies and “tunes” each coil providing power
TETS: ASAIO Journal Article 2000• Power output: 27-30W
• AC-AC: η = 97%• DC-DC: η = 84%
Thoratec TETS: ASAIO Journal Article 2004
• Max output of 45W • η = 80%
The AbioCor Total Artificial Heart System
• Supplies power to Abiocor Total Artificial Heart
• The TET system implemented is proprietary and getting rights would be nearly impossible
• The total system costs ~$250K