{'fraction_non_alphanumeric': 0.023759608665269043, 'fraction_numerical': 0.0, 'mean_word_length': 4.343283582089552, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Ultrasound-guided central venous access: a homemade phantom for simulation.

While the base layer of the mould is congealing, select the latex tubes (Penrose drains) that will be used to simulate the vessels. One-half inch diameter tubes work well to simulate the neck and femoral vessels and one-quarter inch diameter tubes appear like brachial vessels. Tie the latex tubes at one end and fill them with water, being careful to minimize the amount of trapped air. The volume of water in each tube determines whether it will be used to simulate an artery or a vein. For example, tubes that have less water will compress easily and therefore will appear like veins. After the desired volume of water is placed in the latex tube, tie off the open end. After the base layer of the mould is firm, place the latex tubes on top of it. A second aliquot of the gelatin‐Metamucil mixture (enough to fill one-third of the container’s volume, as described above) is poured onto the base layer, with enough volume to surround and cover the latex drains. This will form the middle layer. Chill the mould again until firm. Lastly, prepare another gelatin‐Metamucil mixture and pour it on top of the middle layer until the container is filled to the point that the latex drains are no longer visible. Chill the mould a third time until it is firm and then remove it from the Pyrex container. At this point the phantom is ready for use. Discussion