Latar Belakang: Anestesi spinal menyebabkan vasodilatasi karena ada nya blockade simpatis sehingga menyebabkan terjadinya p elepasan panas pada tubuh dan mengubah sistem termoregulasi di hipotalamus la lu menyebabkan menggigil. Tujuan: Mendeskripsikan gambaran kejadian menggigil pada p asien pasca anestesi spinal. Metode: Penelitian ini adalah deskriptif dengan menggunakan rancangan prospektif dengan teknik non probability sampling atau non-random dengan metode consecutive sampling kepada seluruh pasien anestesi spinal yang termasu k dalam kriteria inklusi pada penelitian ini. Sampel yang digunakan sebanyak 77 sampel. Instrumen pada penelitian ini berupa kuesio ner dan lembar observasi Crossley Mahajan. Teknik analisis yang digunakan ya itu analis univariat. Hasil: Penelitian menunjukkan kejadian menggigil pada pasi en pasca anestesi spinal sebanyak 26 responden (33,8%) dengan derajat menggigil 2. Kesimpulan: Kejadian menggigil didominasi oleh kelompok usia 20 -60 tahun, jenis kelamin laki-laki, indeks massa tubuh 18,2-24 ,9 kg/m 2 , dan lama operasi 60- 120 menit.

Background: Spinal anesthesia causes vasodilation due to sympat hetic blockade that causes the release of heat in the body and alt ers the thermoregulation system in the hypothalamus and then causes shiver. Aim: To determine shivering among post spinal anesthesi a patients at Buleleng Hospital Method: This study employed descriptive study with prospect ive design. There were 77 respondents recruited as sample of this stu dy which were selected by using non probability sampling or non-random techni que with consecutive sampling method. The data were collected by using q uestionnaire and assessment sheet of Crossley and Mahajan. The data were analyz ed by using univariate analysis. Result: The finding of the study showed that there were 5 r espondents (6.5%) experienced shivering grade 0, 18 respondents (23.4 %) experienced shivering grade 1, 26 respondents (33.8%) experienced shiveri ng grade 2, 21 respondents (27.3%) experienced shivering grade 3, and 7 respon dents (9.1%) experienced shivering grade 4. Conclusion: The majority of the respondents experience shiverin g grade 2 (33.8%). Based on the characteristic, shivering is dominated by male aged 20-60 years with ideal body mass index (18.2-24.9 kg/m 2 ) and the length of operation is 60-120 minutes.