22nd February 2024

An 80 year old female is admitted to the acute medical ward suffering with severe diarrhoea and vomiting.

An 80 year old female is admitted to the acute medical ward suffering with severe diarrhoea and vomiting. She also reports general weakness and paraesthesia of the hands. She has a past medical history of asthma, hypertension and hyperthyroidism. She has a severe allergy to Penicillin. She is started on IV fluids and bloods are sent off for further assessment. The results are as follows:

Hb – 105 (120-150g/L)
WCC – 10.2 (4-11 x 10^9/L)
Neut – 2.4 (2-8 x 10^9/L)
Lymph – 3.5 (1-4.8 x 10^9/L)
MCV – 70 (76-99 fL)
Na – 135 (135-145 mmol/L)
K+ – 2.3 (3.5-5 mmol/L)
Ur – 7 (3-7 mmol/L)
Creat – 98 (60-125 umol/L)

Select the most appropriate option for managing this patient