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Original ArticleOpen Access
Prevention of Phantom Sensations After Spinal Anesthesia
Techanivate A 
,
Ultchaswadi P ,
Chaedamphai E
,
Ultchaswadi P ,
Chaedamphai E ANCHALEE TECHANIV ATE, M.D.*,
PORNTHIP ULTCHASWADI, M.D.*,
EKACHAI CHAEDAMPHAI, M.D.*
Background and Objectives: Phantom limb sensation (PLS) after the spinal anesthesia is
an unpleasant experience. The occurrence rate was 80 to 83 per cent from previous studies. The pur-
pose of this study is to evaluate the incidence of PLS, comparing between placing the lower limbs
in the neutral position when analgesic level reach L1 dermatome (Ll group) and T6 dermatome (T6
group).
Methods: Ninety ASA physical status I-II patients, 19-50 year of age, scheduled for lower
abdominal surgery under spinal anesthesia were enrolled. Immediately after the spinal injection, the
patients were placed supine with one of lower limbs flexed (both hip and knee) and the other kept
straight in the neutral position. The analgesic levels were checked every minute; the flexed limbs
were turned to the neutral position when the analgesic level reached Ll and T6, the Ll group and the
T6 group respectively. The images of the lower limbs and patients' satisfactions were evaluated 15
minutes after the blockage.
Results: Twenty per cent of the patients in the L 1 group experienced PLS of the flexed
limbs while 82.2 per cent of the patients in the T6 group did (P
PORNTHIP ULTCHASWADI, M.D.*,
EKACHAI CHAEDAMPHAI, M.D.*
Background and Objectives: Phantom limb sensation (PLS) after the spinal anesthesia is
an unpleasant experience. The occurrence rate was 80 to 83 per cent from previous studies. The pur-
pose of this study is to evaluate the incidence of PLS, comparing between placing the lower limbs
in the neutral position when analgesic level reach L1 dermatome (Ll group) and T6 dermatome (T6
group).
Methods: Ninety ASA physical status I-II patients, 19-50 year of age, scheduled for lower
abdominal surgery under spinal anesthesia were enrolled. Immediately after the spinal injection, the
patients were placed supine with one of lower limbs flexed (both hip and knee) and the other kept
straight in the neutral position. The analgesic levels were checked every minute; the flexed limbs
were turned to the neutral position when the analgesic level reached Ll and T6, the Ll group and the
T6 group respectively. The images of the lower limbs and patients' satisfactions were evaluated 15
minutes after the blockage.
Results: Twenty per cent of the patients in the L 1 group experienced PLS of the flexed
limbs while 82.2 per cent of the patients in the T6 group did (P
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