Abstract: A portable, battery-powered per-patient device automatically detects and logs patient encounters with items, such as medical equipment, drug containers, caregivers, visitors and other patients, in a healthcare facility. A separate per-patient device is assigned to each patient in the facility. The per-patient device is intended to remain with the patient during the patient's stay. The device may be attached to the patient's bed, wheelchair, walker or the like. If the patient is ambulatory, the patient may carry the device. RF-ID or other suitable tags are attached to items that a patient may encounter. Each per-patient device automatically detects and logs RF-ID-tagged items, including the patient, that come within a range of the device. The device also detects and longs when an item is no longer within range of the device, such as because a caregiver leaves the patient's room or a medical device is removed from the patient's room.