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Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure

Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
Oxygen therapy is vital in increasing and maintaining blood oxygen levels in PAH patients. As a result, it aids in reducing fatigue, improving...

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Rat Model of Normothermic Ex-Situ Perfused Heterotopic Heart Transplantation
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Improved Rat Heart Preservation Using High-Pressure Gaseous Perfusion with Oxygen-Xenon Mixture.

Alexander Ponomarev1,2, Daniil Kuznetsov3, Elena Mukhlynina4

  • 1Laboratory of Molecular Biology, Immunophenotyping and Pathological Morphology, Regional Children' Hospital, 620149 Ekaterinburg, Russia.

Pathophysiology : the Official Journal of the International Society for Pathophysiology
|November 24, 2025
PubMed
Summary

The High-Pressure Gaseous Perfusion without Fluidic Preservation Media (HIPPER) method significantly improved heart preservation compared to static cold storage (SCS). HIPPER demonstrated superior functional recovery and reduced infarct size in rat hearts after six hours of storage.

Keywords:
hearthigh-pressureorgan storagepersufflationpreservationtransplantationxenon

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Area of Science:

  • Cardiovascular Research
  • Organ Preservation
  • Biomedical Engineering

Background:

  • Static cold storage (SCS) has limitations for donor heart preservation.
  • A novel High-Pressure Gaseous Perfusion without Fluidic Preservation Media (HIPPER) method was developed.

Purpose of the Study:

  • To evaluate the efficacy of the HIPPER method for heart preservation.
  • To compare HIPPER with traditional static cold storage (SCS).

Main Methods:

  • 33 Wistar rat hearts were divided into SCS (HTK solution) and HIPPER (oxygen-xenon or air mixtures) groups.
  • Hearts underwent six hours of preservation followed by a one-hour Langendorff assessment.

Main Results:

  • HIPPER significantly improved heart resuscitation rates (15/15 vs. 4/10 for SCS).
  • HIPPER resulted in higher heart rates (226 bpm vs. 131 bpm) and left ventricular pressures (73 mmHg vs. 31 mmHg).
  • Infarct size was significantly reduced with HIPPER (6.3% vs. 39.6% for SCS).

Conclusions:

  • HIPPER significantly outperformed SCS in preserving rat hearts after six hours.
  • The HIPPER method shows potential as a superior organ preservation technique.