Nine blood types are listed in this template. Most families know maybe one of them — their own, and that only because a doctor mentioned it once. The rest of the household is running on "I think I'm O-positive but I'm not sure." In a trauma bay, that uncertainty takes time to resolve that the patient may not have.
The Information Gap Nobody Notices Until a Crisis
Most households keep some version of emergency documentation. Insurance cards in a kitchen drawer. An old vaccination record buried in a filing cabinet. A pediatrician's number in a phone that ran out of storage in 2019.
What they don't keep is a consolidated, current, accessible record of the medical basics for every family member. And "accessible" is doing a lot of work in that sentence. A PDF in a cloud folder that requires a password to open is not accessible when you're at the ER with a child who's been stung by something and you don't remember whether the pediatric allergist ever confirmed the epi-pen protocol. A locked filing cabinet at home is not accessible when you're three states away on a family trip.
A Memento database on your phone, with one record per family member, is accessible. It travels with you.
What Gets Entered and Why It Stays Current
The Blood Type field matters most in emergency surgery and obstetric hemorrhage. An O-negative universal donor can receive any type, but can only donate O-negative — a detail that matters when hospital blood bank inventory is tight. An AB-positive patient can receive any type but knowing their actual type speeds transfusion matching significantly. If you genuinely don't know a family member's blood type, the "unknown" option in the dropdown flags it — which is better than a blank field that looks like a data entry error.
Height and Weight fields carry pharmacological weight, literally. Pediatric medication dosing is weight-based. Adult dosing for several drug classes — anticoagulants, certain antibiotics, chemotherapy agents — requires lean body weight or ideal body weight calculations. Having current values on record lets you provide accurate information rather than guessing while a nurse waits for your answer.
The Last Tetanus Shot date field is the one that most adults have completely lost track of. Tdap boosters are recommended every ten years. Most adults cannot tell you when they last had one. When there's a deep puncture wound — a rusty nail in the garage, a garden tool mishap, a bite that breaks skin — the ER staff will ask. Knowing the date lets them make an informed decision about prophylaxis rather than defaulting to "give the shot and err on the side of caution" every time.
Birthmarks, Etc. is the field that feels unusual until you think through the scenarios where it matters. Identifying an unconscious family member who doesn't have their wallet. Providing physical identifiers to law enforcement after an accident with multiple victims. Describing a child to search and rescue. That two-centimeter port-wine stain on the left forearm is not something you'd normally document, but it's the kind of specific marker that resolves identification ambiguity faster than anything else.
Keeping It Accurate
The Date Updated field is the mechanism that prevents the database from becoming outdated fiction. A child's weight changes significantly year over year. Tetanus dates advance on a decade cycle. A family member might switch to contacts and you'd log their eye color the same either way, but height continues to matter well into adolescence. Setting a calendar reminder to update every record annually — tied to a birthday, or the first of the year — keeps the data current without requiring you to remember it independently.
The photo field rounds it out. A current photo, taken within the last year or two, stored with all the other identifying information, is the kind of thing that emergency responders and hospital staff actually need and almost never have available quickly.