What factors are causing the unexpected 30% rise in reported sensor failures for Medtronic's Guardian Connect continuous glucose monitoring system this month?

Introduction

The unexpected 30% rise in reported sensor failures for Medtronic's Guardian Connect continuous glucose monitoring system this month presents a critical issue that demands immediate attention. To address this problem, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both short-term fixes and long-term implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be a recent change in the system. Has there been any software update or manufacturing process change in the past month?

Why it matters: Recent changes often correlate with sudden performance shifts. Expected answer: Yes, a firmware update was rolled out two weeks ago. Impact on approach: If confirmed, we'd focus on the update's impact on sensor functionality.

• Considering user segments, I'm curious about the distribution of failures. Are we seeing this increase across all user groups or is it concentrated in specific demographics?

Why it matters: Helps identify if the issue is universal or related to specific user characteristics. Expected answer: The increase is more pronounced in users over 60 years old. Impact on approach: If true, we'd investigate age-related factors affecting sensor performance.

• Regarding performance metrics, I'm wondering about the nature of these failures. Is there a specific type of failure that's become more prevalent?

Why it matters: Different failure types point to different root causes. Expected answer: There's been a spike in calibration errors. Impact on approach: This would direct our focus to the calibration process and related components.

• Thinking about external factors, has there been any change in how we're measuring or defining sensor failures?

Why it matters: Ensures we're not dealing with a data anomaly rather than an actual performance issue. Expected answer: No changes in measurement or definition. Impact on approach: Confirms we're dealing with a real increase in failures, not a reporting artifact.