8Counting the Costs: A Lifetime of an Implant
An implant is not a one-off purchase. The cost side runs for the rest of the recipient's life: device, surgery, hospitalisation, programming, rehabilitation, processor upgrades, batteries, maintenance and the occasional revision. This module unpacks that ledger, how a lifetime cost model is built, and why future costs are discounted before being set against QALYs.
TThe cost ledger: what you actually pay for
A cost-utility analysis must capture every cumulative cost: diagnosis, device and surgery, rehabilitation, maintenance and follow-up, plus complications, replacements and warranty repairs. Device-plus-surgical costs are commonly $25,000 to $100,000, with middle-income settings achieving $15,000 to $40,000 and import-burdened settings exceeding $50,000 for identical technology. Surgical morbidity enters the model as a brief downward dip in health utility around the operative period rather than a cash cost.[2009][2006]
TRecurring costs: the long tail after surgery
Processor upgrades, batteries, accessories and routine maintenance recur for decades and must be entered into each future year of the model. Programming and rehabilitation are intensive early (children may need 3 to 6 hours daily, tapering under 1 hour by school years 3-4) and dominate the post-surgical ledger more than the device itself. Sensitivity analysis on device longevity and revision rates swings published adult cost-utility across roughly $9,000 to $31,177 per QALY.[2009][2006][1995]
TBuilding and discounting the lifetime model
Costs and benefits are discounted at around 5% per year to present value, heavily reweighting a long childhood horizon toward its early years. A societal perspective adds productivity, caregiver burden and education costs, flipping the pediatric balance toward net savings of roughly $27,000 to $192,000 across the school years. Pediatric scenarios run from about $3,111 to $25,450 per QALY by age at implantation and educational trajectory, with earlier implantation more favourable.[2006][2000][2006]
TCosts against thresholds: is the ledger worth it?
Discounted costs over QALYs gained put adult unilateral implantation at a weighted-average $12,847 per QALY, under conventional $20,000 to $50,000 thresholds. Thresholds are jurisdiction-specific: NICE uses GBP 20,000 to 30,000 per QALY while WHO-CHOICE uses 1 to 3 times GDP per capita, far below a $1,500 to $4,500 ceiling in low-income settings. Adding a second implant yields smaller marginal utility, pushing bilateral cost-effectiveness to roughly $50,000 to over $150,000 per additional QALY, often beyond standard thresholds.[2009][2009][2002]
What is the single most important methodological correction before comparing this model against the authority's cost-per-QALY threshold?
In a lifetime cost-utility model, why is surgical morbidity usually represented as a temporary reduction in health utility rather than a line-item cash cost?
Adult unilateral implantation costs roughly $12,847 per QALY. Adding a second implant typically costs how much per additional QALY, and what does this imply?