In a peer-reviewed publication of the British Medical Journal, there's a “proposal for phylogenic plastic bag clip classification”. The reasoning behind the need for classification is because so many bread clips are ingested and then are hard for x-rays to pick up. The actual proposal is paywalled, but Laughing Squid has several fascinating graphics from the paper. Link
In a peer-reviewed publication of the British Medical Journal, there's a “proposal for phylogenic plastic bag clip classification”. The reasoning behind the need for classification is because so many bread clips are ingested and then are hard for x-rays to pick up. The actual proposal is paywalled, but Laughing Squid has several fascinating graphics from the paper. Link