The Weight of 20 Minutes

While the ambulance siren blares, the hospital has long been in a state of uncertainty, unable to know what is happening inside the vehicle until it arrives. In the case of pregnant women being transported in emergencies, this uncertainty can directly impact the life of the fetus.

The remote fetal monitoring system introduced by Hiroshima Prefectural Hiroshima Hospital in 2025 is designed to fill this gap. Sensors attached inside the ambulance transmit the fetal heart rate and maternal vital data to the hospital in real-time, allowing doctors to understand the condition during transport. This is a first-of-its-kind initiative in Japan.

The most significant change this system brings is the time frame of “20 to 30 minutes.” Previously, monitors were attached only after arriving at the hospital, and the condition was assessed before deciding on a course of action. This decision-making process is now advanced to occur during transport. In obstetric emergencies, 20 minutes can determine whether preparations for a cesarean section can be made and whether a fetus’s hypoxic state will lead to irreversible damage. This is not merely a technical issue; it is a matter of redefining the meaning of time.

The ‘Invisible Line’ Connecting Seven Hospitals

The design philosophy of this system is evident in that it does not operate in isolation within a single hospital. Seven perinatal medical institutions in Hiroshima Prefecture are connected in a network, allowing not only the receiving hospital but also physicians from other collaborating hospitals to access the data.

Why seven hospitals? The perinatal medical structure in Hiroshima Prefecture designates Hiroshima Prefectural Hospital as the Comprehensive Perinatal Mother and Child Medical Center, with regional centers established in each area. This means that by allowing multiple facilities to simultaneously view the data of a pregnant woman in transit, decisions can be made regarding “which hospital can accept her” and “which specialists can respond immediately” before the transport is completed. While the ambulance is en route, preparations for acceptance begin.

However, simply having the lines connected does not make the system functional. If the emergency personnel do not correctly attach the sensors and cannot make initial assessments of abnormal data, the transmitted information becomes meaningless. Hiroshima Prefectural Hospital conducts training programs for transport personnel on basic fetal heart patterns and the identification of urgency. Only when technology and human training align does the time in transit transform from a “blank” into a “part of medical practice.”

—Here, I want to pause and reflect on a question: Who does this system ease? Directly, it protects the pregnant woman and fetus being transported. However, it also changes the burden on obstetricians who previously had to start assessing the condition from scratch upon arrival. The tension of being forced to make immediate decisions without information is somewhat alleviated by the “run-up” of data collected during transport. A system that protects patients simultaneously supports healthcare providers.

The Day the Shinkansen Becomes a ‘Hallway to the Testing Room’

From the same Hiroshima, another initiative is emerging to transform “time in transit” into medical care. The Fukuyama Clinical Laboratory Center, based in Fukuyama City, has begun regular transport of samples using the Shinkansen.

The samples in question include blood and tissue collected from medical institutions in Osaka, Kobe, and Fukuoka. Previously, land transport using dedicated vehicles was the norm, which could take several hours depending on traffic conditions. With Shinkansen transport, samples are entrusted to the train schedule and collected at Hiroshima Station. The journey from Osaka to Hiroshima takes about one and a half hours, and from Fukuoka to Hiroshima, about one hour.

What is crucial here is that this is not merely a matter of speed. Samples have a “freshness” factor. The components of blood samples change over time after collection, affecting testing accuracy. Particularly in coagulation tests and blood glucose measurements, reducing transport time directly correlates with improved reliability of tests. In other words, arriving quickly means being able to measure accurately.

Additionally, there is a structural intrigue in this system. While the Fukuyama Clinical Laboratory Center is a testing institution based in the Chugoku region, utilizing the Shinkansen network allows it to “gather samples in Hiroshima” from medical institutions in Kansai and Kyushu. The consolidation of tests creates economies of scale, enabling investment in advanced testing equipment and ultimately improving the quality of tests. The existing infrastructure of the Shinkansen is reshaping the geographical constraints of medical care.

For the railway company, a regular cargo demand that is not affected by fluctuations in passenger demand is likely welcomed. The tracks laid for transporting people can also serve as arteries for transporting blood—this initiative is noteworthy from a transportation policy perspective in terms of multi-use of infrastructure.

Redefining the Concept of ‘In Transit’

When these two cases are placed side by side, a common structure emerges. Both redefine “time in transit” not as a loss but as a part of medical practice.

The time spent inside an ambulance was once considered “time before medical care begins.” The time during which samples are transported by Shinkansen was “time before they reach the testing room.” The systems that transform “not yet” into “already” are emerging simultaneously from the same region of Hiroshima.

This may not be a coincidence. Hiroshima Prefecture spans approximately 130 km from east to west and has many mountainous areas, making the uneven distribution of medical resources a long-standing issue. Because the costs of distance and time are high in this region, the question of “what can be done during transit” becomes urgent. In urban areas, transport times are shorter, and testing facilities are nearby. However, in less urbanized areas, the act of moving itself can become a barrier to medical care. The efforts to lower that barrier through technology and systems arise from the region’s structural challenges.

The Questions Raised by the Vacated Land

Hiroshima Prefectural Hospital is currently considering relocating from Minami Ward in Hiroshima City, and the prefecture has commissioned “Hirogin Area Design” to investigate and scrutinize the use of the vacated land. How to utilize the site is not merely a real estate issue. The relocation of the perinatal medical hub will change transport routes, alter the distance relationships with collaborating hospitals, and impact the network design of the aforementioned remote monitoring system.

When a building moves, can the system move with it? This will serve as a litmus test for how much the system depends on “place.” Systems connected by data, like remote monitoring, are relatively resilient to changes in physical distance. On the other hand, training systems for transport personnel and collaborations based on personal relationships may need to be restructured due to the relocation of the hub.

When the hardware changes, how much can the software endure? Answers to this question should gradually emerge in the discussions surrounding future land use.

The Tangible Feel Behind the System

Finally, there is one last point I want to make.

When I read about remote monitoring, the first image that came to mind was the hands of the transport personnel attaching sensors inside the ambulance. In a swaying vehicle, they place the equipment on the abdomen of a pregnant woman filled with anxiety and check whether the data is being transmitted correctly. That few minutes of work can expedite the doctor’s judgment by 20 minutes.

The same applies to the story of transporting samples by Shinkansen. There are people handing over cool boxes at the platform, people collecting them at Hiroshima Station, and people delivering them to the testing room. It is not the speed of the Shinkansen but the hands of those present before and after that keep the system functioning.

Technology can be designed. Systems can be organized. However, the final touch that makes the system work is always in the hands of someone on the ground. —The “medical care in transit” originating from Hiroshima is quietly beginning to take shape without forgetting the presence of those hands.