Beware, surgery and anaesthesia may affect your immediate memory | Health - Hindustan Times
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Beware, surgery and anaesthesia may affect your immediate memory

Asian News International | By
Feb 22, 2018 02:12 PM IST

Patients may score slightly lower on certain memory tests after having surgery and anaesthesia, says a new study.

Turns out, surgery and anaesthesia can slightly affect the memory of patients. According to a new study, patients may score slightly lower on certain memory tests after having surgery and anaesthesia. In the study of 312 participants who had surgery and 652 participants who had not (with an average age in the 50s), surgery between tests was associated with a decline in immediate memory by one point out of a possible maximum test score of 30 points.

Surgery may affect your immediate memory.(Shutterstock)
Surgery may affect your immediate memory.(Shutterstock)

Memory became abnormal in 77 out of 670 participants with initially normal memory comprising 18% of those who had surgery compared with 10% of those who had not. No differences in other measures of memory and executive function were observed between participants having and not having surgery. Reduced immediate memory scores at the second visit were significantly associated with the number of operations in the preceding nine years. Working memory decline was associated with longer cumulative operations.

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Dr Kirk Hogan, the senior author said, “The cognitive changes we report are highly statistically significant in view of the internal normative standards we employ, and the large sample size of the control, or non-surgery, population. But the cognitive changes after surgery are small — most probably asymptomatic and beneath a person’s awareness.”

The results await confirmation in terms of follow-up investigations after more surgeries in ageing participants, and by other investigators with other population samples, Dr Hogan explained. He noted that it is too early to recommend any changes in clinical practice regarding prevention, diagnosis, management, and prognosis of cognitive changes after surgery. The findings from the study are published in the journal Anaesthesia.

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