做肠镜无法伸到横结肠处

我老婆做肠镜检查时，医生说，由于横结肠与降结肠交汇处太弯，肠镜弯不过去而终止了横结肠和升结肠的检查。我不太懂，肠子太弯就弯不过去吗？我们在国外，不知国内也有这种情况吗？````````````````````````````````````````````````````````````````````````:需要医生帮助提供远程诊断:肠道太弯，肠镜就无检查吗？查不到的地方怎么办？