Eff ects of diff erent propofol injection speeds on blood pressure, dose, and time of induction

Amaç: Propofolün kan konsantrasyonu, yaş, cinsiyet, vücut ağırlığı, doz, infüzyon hızı ve kalp debisi gibi pekçok faktöre bağlıdır. Bu çalışmada birincil amaç, infüzyon hızının kan basıncı değişikliklerine etkisinin incelenmesidir. İkincil olarak indüksiyon süresi ve dozu incelenmiştir. Yöntem ve gereç: Propofol 200 (P200), 300 (P300) veya 400 (P400) mL st-1 hızlarına ayarlanmış bir perfüzör yardımı ile BIS monitorizasyonu altında, bilinç kaybı olana kadar, 72 erişkin, ASA I hastaya uygulandı. Kan basıncı, indüksiyon süresi ve propofol dozu değişimi 3 grup içinde incelendi. Bulgular: 200 mL st-1 grubundaki sistolik ve ortalama basınç düşüşleri (P = 0,001, P = 0,014 sırasıyla) anlamlı idi. İnfüzyon hızının artması ile sistolik kan basıncındaki düşüş anlamlı bulundu. Diastolik kan basıncı her iki grupta da değişmedi. En kısa indüksiyon süresi 400 mL st-1 infüzyon hızında idi (P200’de 177 sn, P300’de 182 sn, P400’de 134 sn,*P = 0,003) ve indüksiyonda kullanılan toplam propofol miktarı da bu hastalarda anlamlı fazla idi. Vücut ağırlıklarına göre hesaplanmış indüksiyon dozları sırası ile P200’de 2,32 mg kg-1, P300’de 2,64 mg kg-1, P400’de 2,85* mg kg-1 idi, *P = 0,012. Sonuç: Ortalama kan basıncındaki düşüş 200 mL st-1 lik grupta diğerlerine göre daha az idi. 400 mL st-1 lik grupta indüksiyon süresi daha kısa ancak total propofol miktarı daha yüksek idi. Anestezi indüksiyonunda, propofol enjeksiyonu hemodinamik bozulmaya neden olmayacak şekilde yavaş verilmelidir.

Farklı propofol infüzyon hızlarının, indüksiyon dozu, süresi ve kan basıncına etkileri

Aim: Blood concentration of propofol depends on many factors, such as age, gender, body weight, dose, infusion rate, and cardiac output. Th is study primarily investigated the eff ect of infusion rate on blood pressure changes. Secondarily induction time and induction dose were studied. Materials and methods: Propofol was administered at 200 (P200), 300 (P300), or 400 mL h-1 (P400) until loss of consciousness using bispectral index (BIS) monitoring in 72 adult patients. Change in blood pressure, induction time, and dose of propofol were compared among 3 groups. Results: Th e decreases in systolic and mean arterial pressure were statistically signifi cant in the P200 group (P = 0.001, P = 0.014 respectively). Systolic blood pressure decreased signifi cantly as the infusion rate increased. Diastolic blood pressure did not change in either group. Th e duration of induction was shortest with 400 mL h-1 infusion rate (177 s in P200, 182 s in P300, 134 s* in P400,*P = 0.003) and the total propofol dose was signifi cantly higher in these patients (2.32 mg kg-1 in P200, 2.64 mg kg-1 in P300 , 2.85* mg kg-1 in P400, *P = 0.012). Conclusion: Th e induction dose required for loss of consciousness increased with a faster rate of infusion while time for induction was shorter in P400 compared to P200 and P300, and the decrease in mean blood pressure was less aft er induction in P200. Propofol injection should be slow enough to prevent any hemodynamic deterioration in anesthesia induction.

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Turkish Journal of Medical Sciences-Cover
  • ISSN: 1300-0144
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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