The case began as a planned obstetric procedure. At around midday, the patient received a diamorphine spinal, a form of regional anaesthesia delivered directly into the fluid surrounding the spinal cord. This is the standard approach for obstetric cases: it provides complete pain relief from the waist down while keeping the mother awake and present for the delivery of her baby. Diamorphine is included in the spinal mixture to extend the duration and quality of pain relief both during and after the procedure.

The delivery itself was uncomplicated. The baby arrived safely. But almost immediately, a serious problem emerged: the placenta was retained. Instead of separating and delivering naturally, the placenta remained adhered to the uterine wall. This is a known obstetric complication and one that demands urgent attention, because a placenta that will not release is a placenta that prevents the uterus from contracting properly, and a uterus that cannot contract is a uterus that cannot stop bleeding.

The cell saver was in use, a machine that suctions blood from the surgical field, processes and filters it, and returns the patient's own red cells back to them intravenously. In theory it is an excellent tool. The bleeding was happening faster and in ways the cell saver could not keep pace with. It would later return only 800 millilitres, and not at a rate that could meaningfully offset what the patient was losing.

The patient's blood pressure collapsed. Systolic readings plummeted into the low 60s — dangerously below the threshold needed to perfuse the brain, heart and kidneys. For context, a healthy systolic blood pressure sits around 110 to 130 millimetres of mercury. A reading in the 60s represents a cardiovascular system in freefall. Blood was called urgently and administered as rapidly as lines would allow.

The Major Haemorrhage Protocol (MHP) was activated by the senior clinician. This is a hospital-wide emergency alert that triggers the immediate release of large volumes of pre-grouped blood products, including packed red cells, fresh frozen plasma, and platelets, in fixed ratios designed to replace not just the volume of blood lost but the clotting factors and platelets that haemorrhage destroys. Time, in major haemorrhage, is measured in units of blood.

Despite the blood being administered, the patient's condition continued to deteriorate rapidly. She lost consciousness. A patient who was awake and present for her baby's birth was now unresponsive on the table. The decision was made immediately to convert to a general anaesthetic (GA). With a patient unconscious and haemodynamically unstable, the spinal alone was no longer a safe or sufficient anaesthetic approach. Control of the airway and depth of anaesthesia had to be assumed by the team.

I began drawing up the induction drugs. Ketamine was selected as the induction agent. Unlike propofol, which causes significant drops in blood pressure, ketamine stimulates the sympathetic nervous system, maintaining or even raising blood pressure during induction — a critical consideration in a patient who was already haemodynamically compromised and barely holding on. Rocuronium was prepared alongside it, a fast-acting neuromuscular blocking agent that would paralyse the muscles and allow intubation within approximately 60 seconds.

Before the drugs could be given, the patient arrested. The monitor showed PEA — Pulseless Electrical Activity, one of the most sinister rhythms in emergency medicine. PEA means the heart is producing electrical signals that look organised on the monitor, but there is no mechanical output. No pulse. No circulation. The heart is firing, but not pumping. It is a cruel mimic of a functioning heart, and it is fatal without immediate intervention.

A colleague commenced CPR without hesitation. The emergency number 2222 was called by the midwife, summoning the full cardiac arrest team. The room, already busy, was about to become extraordinarily crowded with exactly the right people.

The anaesthetist moved to intubate. This was a peri-arrest intubation, performed under the most difficult possible conditions: a patient in cardiac arrest, actively bleeding, in an obstetric theatre. CPR was paused briefly to allow the laryngoscope to be passed and the tube placed. In cardiac arrest, any pause in compressions carries risk, so the intubation was performed with speed and precision. The tube was confirmed in the correct position. CPR paused again only long enough to establish that intubation had been successful.

Then something remarkable happened. A pulse returned. After intubation, with the airway secured and ventilation established, the patient achieved ROSC. CPR was not recommenced. She had a pulse. The team pushed forward.

The room rapidly filled with senior clinicians. Senior anaesthetic and surgical cover arrived. The cell saver continued to work in the background, though as noted, at a pace that could not match the scale of what was happening. Blood product administration was taken over by another team member, freeing others to focus on monitoring, access, and surgical decision-making.

An arterial line was inserted by one of the senior clinicians, placed directly into an artery to provide continuous, beat-to-beat blood pressure monitoring. In a situation of this magnitude, a cuff reading every few minutes is dangerously inadequate. The arterial line gives the team a real-time waveform, an instantaneous picture of every heartbeat and what pressure it is generating.

A central venous pressure (CVP) line was inserted by another senior clinician, passed into the large central veins near the heart. CVP monitoring provides information about the filling pressure of the right side of the heart, giving the team critical data about the patient's fluid status and helping to guide ongoing blood product replacement. It also provides large-bore central access capable of delivering products at volume and speed.

After a prolonged period of resuscitation and stabilisation, it became clear that the source of haemorrhage could not be controlled medically or by uterine packing alone. The senior surgeon made the decision to perform a peripartum hysterectomy, the surgical removal of the uterus. This is the last resort in obstetric haemorrhage, an irreversible procedure, but one that can be the only way to save a mother's life when the uterus itself is the source of uncontrollable bleeding and it will not stop.

The total estimated blood loss exceeded 15 litres. To understand the scale of that: the average adult human body contains roughly 4.5 to 5.5 litres of blood. This patient lost the equivalent of her entire circulating volume multiple times over. More than 20 units of blood products were administered to keep her alive. An additional 850 millilitres of her own processed blood was collected by the cell saver for return in the post-operative period.

Every major incident like this one leaves lessons in its wake. Reflecting honestly on what went wrong is not about blame. It is about making sure the next team, in the next theatre, is better prepared. These are the failures this case exposed.

Staffing levels were critically insufficient. The presence of a second qualified practitioner made a tangible difference to the outcome. Had that additional support not been there, the situation could have deteriorated beyond recovery at several key moments. This is not a criticism of individuals. It is a systemic problem that this case laid bare.

Communication with the overall coordinator broke down at a crucial time. When a situation escalates at this speed, the coordinator role carries enormous responsibility: to anticipate needs, mobilise resources, and ensure every team member has what they require. In this case, that support was not forthcoming, and the gap was felt acutely by those on the floor.

The cell saver, while present and operational, returned only 800 millilitres and could not deliver it at a speed that offset the rate of loss. In a haemorrhage of this magnitude, the cell saver alone was never going to be sufficient, but the limitations of the device in real-world high-velocity bleeding scenarios are worth understanding clearly before the next case.

This case is shared in the spirit of honest reflection and professional learning. All identifying details, including staff and patient information, have been fully removed. Obstetric haemorrhage remains one of the leading causes of maternal mortality worldwide. Sharing what happens in these rooms, truthfully and without varnish, is one small way to make them safer. New episodes every week at www.skillfullscrubs.co.uk.