I asked AI and a snow collapse matches quite well. I even put the quote from the autopsy .
Conclusion:
Based on the forensic examination of the body of L. A. Dubinina I think that the death of Dubinina was caused by massive hemorrhage into the right ventricle, multiple bilateral rib fractures, and internal bleeding into the thoracic cavity.
The said damage was probably caused by an impact of great force causing severe closed lethal trauma to the chest of Dubinina. The trauma was caused during life and is the result of high force impact with subsequent fall, throw or bruise to the chest of Dubinina.
Damage to the soft tissue of the head and ‘bath skin’ wrinkling to the extremities are the post-mortem changes (rot and decay) of Dubinina’s body, which was underwater before it was found.
Dubinina died a violent death.
Medical examiner signature (Vozrozhdenniy)
Based on the examination of the body of Zolotaryov, 37 years old, I think that he died due to multiple fractures of the right ribs with internal hemorrhaging to the pleural cavity while at a low temperature. The above mentioned multiple fractures of Zolotaryov’s ribs with hemorrhaging into the pleural cavity were caused in vivo as an effect of a high-power impact to the chest of Zolotaryov at the moment of his fall, squeezing or throwing. The damage of the soft tissue in the area of Mr. Zolotaryov’s head and the presence of bath skin in the area of fingers and upper and lower extremities are postmortem changes in the body of Zolotaryov, which was underwater before it was found.
Zolotaryov died a violent death.
Forensic Medical Examiner - signature (Vozrozhdenniy)
The autopsy reports with the knowledge they had at the time seem to fit with what AI says. Crush injury looks to be consistent and we have a tree and/or 3 meters of snow above the 4 in the ravine with the injuries. It's not just the fractured ribs that fit with a crush but the internal bleeding in the right ventricle thoracic cavity and plural cavity.
AI Overview
+10
A flail chest—where adjacent ribs are fractured in at least two places, causing a segment of the chest wall to move independently (paradoxically)—can occur without visible external marks (bruising or lacerations) due to the nature of the impacting force.
This scenario, known as a "silent" or mark-free flail chest, is usually caused by:
Significant Blunt Force Over a Large Surface Area: A broad, flat object impacting the chest can cause massive internal damage (fracturing ribs in multiple spots) without breaking the skin or causing immediate, visible bruising.
Deceleration Injury (e.g., Seat Belt or Steering Wheel): In high-speed motor vehicle accidents, the body may hit the steering wheel, causing immense pressure. If the energy is distributed across a large area, the skin may remain intact despite fractured, flail ribs underneath.
Rapid Crush Injury: A heavy object landing directly on the chest can crush the ribs, leading to double-fractures and a flail segment. The pressure is blunt and applied instantaneously, which may not cause surface bruising.
Significant Falls (especially in the Elderly): A fall from a height onto a blunt surface (like a railing or edge of a table) can cause such injuries. The elderly are particularly susceptible because osteoporosis makes their bones fragile, allowing a lower-force impact to break ribs in multiple places without severe soft tissue damage.
AI Overview
+13
A collapsed snow hole (snow cave) can cause severe crush injuries due to the high density and weight of compacted snow, leading to life-threatening thoracic trauma such as flail chest. A flail chest occurs when 3 or more consecutive ribs are fractured in 2 or more places, creating a free-floating, unstable segment of the chest wall that moves paradoxically (inward on inspiration, outward on expiration).
Mechanisms and Injuries in Snow Collapse
Crush Mechanism: When a snow structure collapses, it can act similarly to a structural collapse or avalanche, trapping the occupant and applying intense, direct pressure on the chest and abdomen.
Flail Chest Pathophysiology: The intense pressure breaks ribs in multiple locations, causing a portion of the rib cage to separate from the thoracic cavity.
Associated Injuries: Along with flail segments, these injuries are frequently accompanied by severe pulmonary contusions (bruising of the lung), pneumothorax (collapsed lung), or hemothorax (blood in the chest cavity).
Systemic Effects: The compression can lead to hypoxia (low oxygen),, and in cases of prolonged compression, crush syndrome, which can cause muscle damage and kidney failure.
AI Overview
+14
Autopsy findings in fatal flail chest crush injuries, typically resulting from high-energy blunt trauma like vehicular accidents or heavy compression, reveal extensive damage beyond the broken ribs and paradoxical movement. Key, often fatal, findings include severe underlying pulmonary contusion (bruising), hemothorax (blood in the chest cavity), and, frequently, signs of crush asphyxia.
Other common autopsy findings from flail chest crush injuries include:
Internal Intrathoracic Findings
Pulmonary Contusion/Laceration: Nearly universal; involves hemorrhage, edema, and sometimes necrosis of the lung parenchyma, which is often the actual cause of respiratory failure.
Pneumothorax and Hemothorax: Air (pneumothorax) or significant blood (hemothorax) trapped in the pleural cavity, which causes lung collapse.
Cardiac and Great Vessel Injuries: Contusion of the heart muscle, rupture of the aorta, or hemopericardium (blood in the pericardial sac).
Tracheobronchial Injury: Lacerations to the airway, which can lead to air leak and mediastinal emphysema.
Diaphragmatic Rupture: Tears in the diaphragm due to high-pressure abdominal compression.
External and Soft Tissue Findings
Crush Asphyxia (Traumatic Asphyxia): Characterized by intense purple congestion and swelling of the face, neck, and upper chest, caused by increased intrathoracic pressure.
Subconjunctival and Facial Petechiae: Minute red dots (petechial hemorrhages) on the skin of the face, neck, and conjunctivae (eyes), resulting from blood vessel rupture due to pressure.
Seatbelt or Steering Wheel Marks: External bruises or abrasions, which can be clues to the mechanism of high-energy impact.
Subcutaneous Emphysema: Air under the skin, which creates a "crackling" or "crunching" feeling when palpated.
Associated Non-Thoracic Injuries
Solid Organ Damage: Injury to the liver, spleen, or kidneys, often associated with lower rib fractures.
Spinal Injuries: Fractures or dislocations of the thoracic spine, a common result of high-energy trauma.
Rhabdomyolysis: In cases of prolonged crushing, breakdown of muscle tissue may occur, which can be seen as myoglobinuria (myoglobin in urine).
Yes, the combination of injuries described—hemorrhage into the right ventricle, multiple bilateral rib fractures, and internal bleeding into the thoracic cavity (hemothorax)—could be caused by severe crush injuries from a snow cave or ice cave collapse.
These injuries are consistent with high-energy blunt force trauma, which is frequently seen in cases where heavy ice or snow falls onto a person.
Mechanism of Injury in a Collapse
Crush Mechanism: When a snow or ice cave collapses, the victim is subjected to intense, concentrated weight. If this weight lands on the chest, it causes a "crush injury".
Multiple Bilateral Rib Fractures: The severe pressure can break multiple ribs on both sides of the chest, potentially creating a "flail chest," where a segment of the rib cage becomes detached from the rest.
Hemothorax (Internal Bleeding): The fractured ribs can lacerate intercostal blood vessels or the lung tissue, leading to massive bleeding into the thoracic cavity (hemothorax).
Right Ventricle Hemorrhage: The massive, direct impact can compress the heart between the sternum and spine, causing blunt cardiac injury or even perforation of the heart by a broken rib fragment.
Relevance to Snow/Ice Cave Collapses
High Impact Force: Collapsed ice, in particular, is extremely heavy and dense, capable of causing fatal trauma to the chest, head, and bones.
Documented Fatalities: Similar incidents, such as ice cave collapses in Iceland or Washington, have resulted in fatalities with severe crush injuries and broken bones.
Similar to Other Accidents: The trauma is similar in nature to injuries sustained in major motor vehicle collisions, specifically those involving blunt chest trauma.
AI Overview
+14
A massive hemorrhage into the right ventricle combined with flail ribs, often resulting from severe crush injuries such as landslides, constitutes a critical, life-threatening thoracic emergency. It requires immediate, aggressive, and specialized care to manage the unstable chest wall (flail segment) and potential underlying cardiac rupture or contusion.
Key Clinical Aspects
Mechanism of Injury: Landslide crush injuries involve immense blunt force, causing multiple rib fractures (3+ ribs in 2+ places) and severe chest wall destabilization, known as flail chest.
Pathophysiology:
Flail Chest: The damaged chest wall moves paradoxically (inward on inspiration, outward on expiration), which severely restricts breathing and causes acute respiratory distress.
Right Ventricular (RV) Hemorrhage: The direct crushing force can cause cardiac contusion or rupture. Because the right ventricle is positioned directly behind the sternum, it is highly susceptible to blunt trauma.
Complications: These injuries are often accompanied by significant haemothorax (blood in the chest cavity), pneumothorax (collapsed lung), and severe lung contusion.
The cedar branches were definitely used for a fire . A lot of melted snow was found around the fire when the snow had melted, some of the branches were under one of the Yruis about the same diameter as the fire and they were broken in several places. There were also branches that were broken left hanging on lower branches . The fire was estimated to have burned for an 1.5 hours. Burns were found on the socks and clothing of a number of the hikers , they are mostly superficial and localised . They are consistent with people trying to warm their limbs , especially when feeling has gone. A wool sock was found in the fire along with a number of items of clothing , one being a handkerchief and a hat/balaclava. The sock matched the other one on Yuri's body that he was wearing.
I would suspect that the majority of burns to the flesh and clothing were done at the fire around the cedar.