Total gangrene of the oral tongue following intra-aortic balloon pump for cardiogenic shock

Thinking Out-of-the-Box: A Non-Standard Application of Standard Pulse-Oximetry and Standard Near-Infrared Spectroscopy in a COVID-19 Patient

PURPOSE

Purpose of this report is to describe the feasibility of lingual pulse oximetry and lingual near-infrared spectroscopy (NIRS) in a COVID-19 patient to assess lingual tissue viability after several days of mechanical ventilation in the prone position.

MATERIALS & METHODS

In a COVID-19 ICU-patient, the tongue became grotesquely swollen, hardened and protruding from the oral cavity after 20 h of mechanical ventilation uninterrupted in the prone position. To assess the doubtful viability of the tongue, pulse-oximetric hemoglobin O2-saturation (SpO2; Nellcor, OxiMax MAX-NI, Covidien, MA, USA) and NIRS-based, regional tissue O2-saturation measurements (rSO2; SenSmart, Nonin, MN, USA) were performed at the tongue.

RESULTS

At the tongue, regular pulse-oximetric waveforms with a pulse-oximetric hemoglobin O2-saturation (SpO2) of 88% were recorded, i.e. only slightly lower than the SpO2 reading at the extremities at that time (90%). Lingual NIRS-based rSO2 measurements yielded stable tissue rSO2-values of 76-78%, i.e. values expected also in other adequately perfused and oxygenated (muscle-) tissues.

CONCLUSION

Despite the alarming, clinical finding of a grotesquely swollen, rubber-hard tongue and clinical concerns on the adequacy of the tongue perfusion and oxygenation, our measurements of both arterial pulsatility (SpO2) and NIRS-based tissue oxygenation (rSO2) suggested adequate perfusion and oxygenation of the tongue, rendering non-vitality of the tongue, e.g. by lingual venous thrombosis, unlikely. To our knowledge, this is the first clinical report of lingual rSO2 measurement.

Ischemic necrosis of the tongue in surgical patients with septic shock: a case report

Background

As the tongue is a well-vascularized organ, ischemic necrosis of the tongue is a rare disease entity. Critically ill patients with profound shock may experience end-organ hypoperfusion, which might result in tongue necrosis. However, to our best knowledge, there are no reports regarding ischemic necrosis of the tongue in surgical patients with septic shock.

Case presentation

Two patients recently developed ischemic necrosis of the tongue in our surgical intensive care unit. Both patients had undergone emergent surgery for ischemic enteritis and developed postoperative septic shock. The first patient responded to critical treatment with a short period of circulatory shock, and the delivered dose of the vasopressor seemed to be acceptable. In contrast, the second patient developed postoperative refractory shock, and high-dose vasopressor treatment was required to maintain adequate tissue perfusion. Both patients developed ischemic necrosis of the tongue and died shortly after its emergence, despite vigorous resuscitation.

Conclusions

We suggest that ischemic necrosis of the tongue is an under-reported manifestation of any type of circulatory shock, which may have a complex pathogenic mechanism. Clinicians should be aware of the possibility of ischemic necrosis of the tongue in patients with circulatory shock, even if the patient exhibits clinical improvement, as this awareness may facilitate estimation of their prognosis and preparation for clinical deterioration.

Ischemic necrosis of the tongue in patients with cardiogenic shock

OBJECTIVES/HYPOTHESIS

Ischemic necrosis of the tongue is a rare entity generally associated with vasculitis. Critically ill patients with shock might experience hypoperfusion of head and neck end organs including the tongue.

STUDY DESIGN

Retrospective analysis of hospital charts.

METHODS

Case histories and photographs of five patients who developed ischemic tongue necrosis in the context of cardiogenic shock.

RESULTS

Five critically ill patients in our institution's cardiothoracic intensive care unit developed ischemic necrosis of the tongue. All five patients experienced protracted courses of profound cardiogenic shock requiring high-dose vasopressor support and urgent cardiac surgery. Three patients required intra-aortic balloon pumps. All patients had concomitant signs of poor end organ perfusion, including lower extremity ischemia and renal and hepatic failure. Ultimately, four of five patients died, with one patient surviving after sloughing of the entire oral tongue.

CONCLUSIONS

Ischemic necrosis of the oral tongue is an uncommon but perhaps under-reported manifestation of end organ hypoperfusion in shock, likely signifying poor prognosis.

Idiopathic gangrene of the tongue: a case report

Introduction

Gangrene of the tongue is an extremely rare condition. We encountered a 35-year-old patient who presented with this entity.

Case presentation

A 35-year-old male patient from rural background presented with blackening of the tongue. Its exact cause could not be ascertained. Examination revealed it to be gangrene. It was treated with excision of the gangrenous part.

Conclusion

As this is a very rare condition, it is being reported with a brief review of the relevant literature. The treatment must be based on the etiology; however, if the etiology is not known, it must be symptomatic.