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Table 1 Observation indexes

From: Advantages of using a prophylactic epidural closed drain and non-watertight dura suture in a craniotomy near the “parietal site”

Indexes Diagnosis criteria Significance
Surgical site-related complications
SFC Two doctors examined the wound flap. An obvious wave motion was present. Main index
STH CT or MRI shows a cystic effusion with an obvious occupying effect. The symptoms are high intracranial pressure, such as a headache, epilepsy, haemiplegia, aphasia, or consciousness disturbance. A serious clinical event, may even lead to a brain hernia. Emergency decompression can be necessary if mannitol does not alleviate the symptoms.
Infection
Intracranial infection (1) Fever > 38.5 °C, (2) meningeal irritation sign, (3) leukocyte count in CSF > 100/ml, (4) glucose in CSF < 2.5 mmol/L.  
Wound infection (extradural abscess) (1) Redness, swelling, heat, and pain in the scalp soft tissue, wound dehiscence and purulent fluid. (2) Purulent fluid was found in debridement.  
Pulmonary infection (1) Symptoms of pneumonia: high fever, cough, expectoration; (2) haemogram leukocyte increased; (3) inflammation visible on chest film or lung CT. Hemiplegia, epilepsy or consciousness disorder operatively; long-term bed rest will induce falling pneumonia.
Epidural hematoma High-density space-occupying lesions on CT.  
General condition
Strength-better Preoperative muscle strength vs. muscle strength 1 week postoperatively, 0 unchanged or worse, 1 better.  
Epilepsy-better Preoperative epileptic seizure vs epileptic seizure 1 week postoperatively, 0 unchanged or worse, 1 better.  
T_AVG Average temperature from the 1st to 3rd POD. Related to infection
T_MAX Max temperature from the 1st to 3rd POD. Related to infection
Length of stay Postoperative hospital stay = total hospital stay − preoperative hospital stay. Related to infection
Postoperative medicine fee Medicine fee = total cost − high value consumables applied during operation − navigation − operation cost Related to infection
  1. STH subdural tensile hydrops, SFC subgaleal fluid collection, T_AVG average body temperature, T_MAX maximum body temperature