CPR & Severe Bleeding Metronome心肺复苏与大出血急救器
100–120 compression cadence, 30:2 cycles and a tourniquet timer — calm prompts under stress. 每分钟 100–120 次按压节拍、30:2 循环与止血带计时——紧张时的冷静提示。
How to use the CPR and bleeding metronome
In a cardiac arrest or severe hemorrhage, the first three minutes decide the outcome. This tool removes the arithmetic and the clock-watching so you can focus on hands-on care: it beats at 110 compressions per minute, walks you through 30:2 cycles, and keeps a persistent tourniquet timer.
The CPR tab follows current American Heart Association and Red Cross sequencing. First make the scene safe — traffic, fire, water, electricity and weapons all create a second victim. Check responsiveness by tapping and shouting, then call emergency services and send a bystander for an AED. Open the airway with a head-tilt and check breathing for no more than ten seconds; occasional gasping, called agonal breathing, is not normal breathing. Then begin cycles of 30 compressions and 2 breaths. Press 5–6 cm (2–2.4 in) deep for adults, roughly one-third of the chest for children and infants, allow complete recoil, and keep pauses under ten seconds. The metronome tracks elapsed time, your position inside the cycle and completed cycles, and it requests a screen wake lock when the browser allows it so the phone does not sleep mid-resuscitation. With two trained rescuers treating a child or infant, the ratio changes to 15:2.
The severe bleeding tab implements the Stop the Bleed sequence: expose the wound, apply firm direct pressure with both hands and body weight, pack gauze into junctional wounds at the groin or armpit, and place a tourniquet 5–7 cm (2–3 inches) above a life-threatening limb wound. The tourniquet button stamps the application time into this device's local storage and keeps counting even after a page reload, because the receiving trauma team needs that number. Never loosen a tourniquet, write the time on the victim, and apply a second tourniquet just proximal to the first if bleeding continues.
The emergency tab displays the correct local number for your region and includes the sentence “I need an ambulance. Someone is unconscious and not breathing normally” in English, Chinese, Spanish and French, plus a location-reporting checklist: coordinates or trail marker, number of victims, mechanism, consciousness and breathing.
Why cadence and recoil matter
Blood flow during CPR is generated by the compression itself; rates below 100 per minute or incomplete chest release between presses sharply reduce coronary and brain perfusion. Fatigue degrades depth within two minutes, which is why rescuers should swap roles around that mark without a long pause. An AED used promptly dramatically improves survival — turn it on and simply follow the voice prompts while continuing CPR between analyses.
如何使用心肺复苏与止血节拍器
心跳骤停或致命性大出血时，前三分钟往往决定结局。本工具把算数和看表的负担拿掉，让你专注于手上的处置：每分钟 110 次的按压节拍、30:2 循环提示，以及可持久保存的止血带计时器。
心肺复苏标签页遵循美国心脏协会与红十字会的现行流程：先确认现场安全——车流、火焰、积水、漏电、武器都可能造成第二个伤者；拍肩呼喊判断反应，随后拨打急救电话并让旁观者去取 AED；压额抬颏开放气道，检查呼吸不超过 10 秒，偶尔出现的叹息样（濒死）呼吸不算正常呼吸。之后开始 30 次按压配 2 次吹气的循环：成人按压 5–6 厘米，儿童与婴儿约为胸廓前后径的三分之一，每次按压后让胸廓完全回弹，中断尽量短于 10 秒。节拍器会显示已用时间、组内进度与完成循环数，并在浏览器支持时申请屏幕常亮，避免复苏途中手机锁屏。两名受过训练的施救者抢救儿童或婴儿时，比例改为 15:2。
大出血标签页按“止血行动（Stop the Bleed）”流程：暴露伤口、双手加上身体重量用力直接压迫；腹股沟、腋下等交界部位用纱布填塞；四肢致命出血在伤口上方 5–7 厘米（2–3 英寸）扎止血带。按下止血带按钮后，上止血带的时间会写入本机存储，即使刷新页面仍持续计时——接诊创伤团队正需要这个数字。止血带一旦扎上绝不要松开，把时间写在伤者额头；第一条止不住时，在更靠近心脏一侧加扎第二条。
急救电话标签页显示你所在地区的正确号码，并提供“我需要救护车。有人失去意识，呼吸不正常。”这句话的英、中、西、法四语卡片，以及位置报告清单：坐标或步道标记、伤员人数、受伤机制、意识与呼吸情况。
为什么节奏与回弹如此重要
心肺复苏时的血流由按压本身产生：频率低于每分钟 100 次、或按压之间胸廓没有完全放松，都会明显降低心脏与脑部灌注。疲劳会在两分钟内让按压深度下降，因此施救者应在两分钟左右快速交换角色。尽早使用 AED 可显著提高存活率——开机后跟着语音提示做，分析与放电之外的时间持续按压。