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Proper aseptic technique is indicated for all surgical patients regardless of size and species. Place quarter drapes around the surgical site and then cover with a patient drape with a fenestration around the site. Currently, disposable paper drapes are commonly used for both quarter drapes and patient drapes. Avoid the tendency to make a small sterile field as it is then easy to contaminate yourself by accidentally touching objects on the table outside the sterile field. Create a sterile field of the entire table top and take appropriate action to reestablish a sterile field if contamination occurs (Figure 1.2). When working with very small patients, it may be beneficial to use a clear plastic drape over the patient to allow respiration to be monitored; however, other respiratory monitoring devices such as end‐tidal CO₂ monitors allow monitoring of respiration more accurately and do not require the ability to visualize the patient.

Figure 1.2 This 1.2 kg patient is being draped for a thoracotomy. First quarter drapes of Huck towels are placed to isolate the surgical field (a). Then the patient is covered with a patient drape large enough to create a sterile field of the entire table (b). The instruments are on the back table, and this is pulled up to the patient drape to complete the sterile field (c).