Blood Loss in Obstetrics Using a Haemoglobin Dilution Technique

Wallace, George F.

doi:10.1111/j.1471-0528.1967.tb03935.x

Cited by 31 publications

(11 citation statements)

References 3 publications

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“…That study also reported that blood loss during delivery without episiotomy was lower than during delivery with episiotomy: volumes of 196.5 ml and 327.0 ml, respectively. (18) Our study found that blood loss was significantly greater with forceps delivery than with spontaneous deliveries with and without episiotomy; a result that agrees with other studies. (16) A study in India compared blood loss among women who had spontaneous deliveries using vacuum extraction or forceps by use of hemoglobin variation measured between pre-and postpartum periods; the researchers reported that the mean blood loss estimated in women who underwent vacuum extraction was less than in women who underwent forceps delivery (234 vs 337 ml; p<0.05).…”

Section: Discussionsupporting

confidence: 83%

Análise da hemorragia no parto vaginal pelos índices de eritrócitos e hematócrito

et al. 2014

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Objective: To analyze hemorrhage at vaginal delivery using hemoglobin and hematocrit indices. Methods: This was a cross-sectional study of 328 vaginal deliveries divided into spontaneous delivery with or without episiotomy and forceps delivery. The sample was randomly stratified by type of vaginal delivery. Data were collected at admission for delivery, hospital discharge and postpartum return visit. Results: There were 122 (37.2%) deliveries without episiotomy, 147 (44.8%) with episiotomy, and 59 (18.0%) with forceps delivery and episiotomy. Hemoglobin values between admission for delivery and discharge ranged from -5.9 g/dl to 0.7 g/dl. Hemoglobin reduction was significantly higher in women having forceps delivery than in those with spontaneous deliveries, with and without episiotomy (p=0.0133 and p<0.0001, respectively). Hemorrhage was greater in the forceps delivery group than in the other groups. Conclusion: The analysis of hemorrhage at vaginal delivery by using hemoglobin and hematocrit indices showed variation among the three types of vaginal delivery studied. There was greater hemorrhage with forceps delivery and less hemorrhage with spontaneous delivery. In women with forceps delivery, postpartum indices were lower than those at hospital admission. ResumoObjetivo: Analisar a hemorragia no parto vaginal através dos índices de eritrócitos e hematócrito. Métodos: Estudo transversal realizado em 328 partos vaginais divididos em: espontâneo, com e sem episiotomia, e parto fórceps. A amostragem foi aleatória estratificada por tipo de parto vaginal. Os dados foram coletados na internação para o parto, na alta hospitalar e no retorno puerperal. Resultados: Foram estudados 122 (37,2%) partos sem episiotomia, 147 (44,8%) com episiotomia e 59 (18,0%) com uso de fórceps e episiotomia. O valor individual de hemoglobina, entre a internação para o parto e a alta hospitalar variou de -5,9 g/dl a 0,7 g/dl.A redução da hemoglobina foi significativamente maior no parto fórceps comparado aos partos espontâneos, com e sem episiotomia, p=0,0133 e p<0,0001, respectivamente. No parto fórceps a hemorragia é maior quando comparada aos outros tipos de parto Conclusão: A análise da hemorragia no parto vaginal através dos índices de eritrócitos e hematócrito evidenciou que há variação nos três tipos de parto vaginal estudados, sendo a hemorragia maior no parto fórceps e menor no parto vaginal espontâneo. No puerpério, nos casos de partos fórceps estes índices mantiveram-se inferiores aos da internação.

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Section: Discussionsupporting

confidence: 83%

Análise da hemorragia no parto vaginal pelos índices de eritrócitos e hematócrito

et al. 2014

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“…These include assessment of change in the red-cell volume calculated on the basis of estimated red cell mass 11 or hematocrit, 12 colorimetric technique, 13 and a gravimetric method such as our own, which requires weighing materials such as laparotomy sponges on a scale and subtracting known weights of the dry surgical materials from blood-soaked materials to calculate the volume of blood loss. These include assessment of change in the red-cell volume calculated on the basis of estimated red cell mass 11 or hematocrit, 12 colorimetric technique, 13 and a gravimetric method such as our own, which requires weighing materials such as laparotomy sponges on a scale and subtracting known weights of the dry surgical materials from blood-soaked materials to calculate the volume of blood loss.…”

Section: Discussionmentioning

confidence: 99%

“…A number of other methods have been used to measure blood loss in different clinical settings. These include assessment of change in the red-cell volume calculated on the basis of estimated red cell mass 11 or hematocrit, 12 colorimetric technique, 13 and a gravimetric method such as our own, which requires weighing materials such as laparotomy sponges on a scale and subtracting known weights of the dry surgical materials from blood-soaked materials to calculate the volume of blood loss. 14 Our method of assessment differs from other gravimetric methods in that it compares the weight of blood in soaked gauze and drape with that of 10 mL of blood from the same patient at the time of the procedure.…”

Section: Discussionmentioning

confidence: 99%

Blood loss during vascular access cannulation: Quantification using the weighed gauze and drape method

Awobusuyi

Mapayi²,

Adedolapo³

2008

Hemodialysis International

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Anemia is an important complication of chronic renal disease, with a significant impact on the morbidity, quality of life, and mortality in this group of patients. Inadequate erythropoietin production, reduced life span of erythrocytes in uremic serum, bone marrow suppression by uremic toxins, chronic inflammation, and contaminants in the water treatment unit are recognized etiological causes of anemia in chronic kidney disease patients. Little attention has been paid to possible contributions of small but continual loss of blood during vascular access cannulation for hemodialysis in these patients. The aim of this study is to quantify the volume of blood loss during femoral vein cannulation in patients on hemodialysis. The average volume of blood loss during femoral cannulation was evaluated using a simple and inexpensive procedure of deriving volume of blood lost, from the weights of soaked gauze and drape during the access cannulation procedure. The mean blood loss per procedure during femoral cannulation was 36.52 mL+/-2.70 SD, with a range of 6.47 to 100.20 mL. The calculated average weekly loss in patients on thrice-weekly dialysis schedule is 109.56 mL of blood, with a monthly loss of 438.24 mL. Cumulative blood loss during femoral vein cannulation appears to be significant. Its contribution in the sustenance of anemia in hemodialysis patients deserves further evaluation.

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“…Not only is estimation of blood loss not exact; with wide margins of error, but blood loss tends to be underestimated during obstetrical emergencies, as well as routine procedures. Wallace (1967) studied obstetrical blood loss with 835 patients. He stated that using visual assessment at delivery was misleading because blood loss was always underestimated.…”

Section: Duticulties Of Estimating Blood Lossmentioning

confidence: 99%

Measuring nurses' accuracy of estimating blood loss

Higgins

1982

Journal of Advanced Nursing

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Estimation is the most commonly used method to determine blood loss. According to the literature, estimating blood loss is not exact; there are wide margins of error and blood loss tends to be underestimated. Forty-two registered nurses were asked to estimate varied amounts of blood on 20 peripads. Both over- and underestimation occurred; 71% overestimated and 25% underestimated blood loss. There was also disagreement as to what constituted heavy, moderate or slight blood loss. There was no difference in accuracy among variables of education, years of experience, specialty area, or when and how nurses learned to estimate. Contrary to current literature, these nurses: 1 overestimated blood loss; 2 had significant difficulty in estimating very small and very large amounts of blood; 3 although in error, were consistent in estimating repeated samples with the same amounts of blood; 4 were not consistent in estimating heavy, moderate, and slight blood loss.

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Blood Loss in Obstetrics Using a Haemoglobin Dilution Technique

Cited by 31 publications

References 3 publications

Análise da hemorragia no parto vaginal pelos índices de eritrócitos e hematócrito

Análise da hemorragia no parto vaginal pelos índices de eritrócitos e hematócrito

Blood loss during vascular access cannulation: Quantification using the weighed gauze and drape method

Measuring nurses' accuracy of estimating blood loss

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