Results

The outcome of treatment is favourable in around 70% of cases. However, mortality is 15% to 30% in various series and morbidity (i.e., neurological sequelae) is significant in 10 to 20% of patients45,59,85.

Early HBO is the most important variable in prognosis (Table 3). Results are excellent if it is provided within one hour (90% success); good if treatment is delayed between 1 and 6 hours (75% success) whereafter the prognosis becomes increasingly poor with further delay.

Table 2.2.2-3. Evolution with HBO (54 patients)78

Number of patients

Time elapsed before HBO2T

Recoveries without sequellae

Survivals with sequellae

Deaths

54

38 (70%)

7 (13 %)

9 (17 %)

12 (22 %)

1h

11 (92 %)

-

1 (8 %)

21 (39 %)

1 - 6h

16 (76 %)

2 (10 %)

3 (14 %)

14 (26 %)

6 - 12h

8 (57 %)

4 (29 %)

2 (14 %)

7 (13 %)

12h

3 (43 %)

1 (14 %)

3 (43 %)

The prognosis of GE during neurological or heart surgery is less favourable. Here diagnosis is often delayed until reversal of anesthesia and/or referral is delayed until the surgical procedure is completed.

The prognosis of GE during neurological or heart surgery is less favourable. Here diagnosis is often delayed until reversal of anesthesia and/or referral is delayed until the surgical procedure is completed.

Finally, in cases of cardiac arrest that prove refractory to HBO - even with rapid referral - the poor prognosis may be due to cerebral anoxia rather than the embolis per se.

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