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Pettersen S, Falk RS, Vangen S, Nyfløt LT. Exploring trends of severe postpartum haemorrhage: a hospital-based study. BMC Pregnancy Childbirth 2023; 23:363. [PMID: 37208647 DOI: 10.1186/s12884-023-05702-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 05/14/2023] [Indexed: 05/21/2023] Open
Abstract
BACKGROUND Over the past two decades several high-income countries have reported increased rates of postpartum haemorrhage (PPH). Many of the studies are registry studies with limited access to detailed information. We aimed to explore trends of severe PPH in the largest labour ward in Norway during a 10-year period with a hospital based study. Our population constituted all women who gave birth after week 22 at Oslo University Hospital between 2008 and 2017. The main outcome measure was severe PPH, defined as registered blood loss greater than 1500 ml, or transfusion of blood products due to PPH. METHODS We estimated the incidence of severe PPH and blood transfusions, and performed temporal trend analysis. We performed Poisson regression analysis to investigate associations between pregnancy characteristics and severe PPH, presented using crude incidence rate ratios (IRR) with 95% confidence intervals (CI)s. We also estimated annual percentage change of the linear trends. RESULTS Among 96 313 deliveries during the 10-year study period, 2621 (2.7%) were diagnosed with severe PPH. The incidence rate doubled from 17.1/1000 to 2008 to 34.2/1000 in 2017. We also observed an increased rate of women receiving blood transfusion due to PPH, from 12.2/1000 to 2008 to 27.5/1000 in 2017. The rates of invasive procedures to manage severe PPH did not increase, and we did not observe a significant increase in the number of women defined with maternal near miss or massive transfusions. No women died due to PPH during the study period. CONCLUSION We found a significant increasing trend of severe PPH and related blood transfusions during the 10-year study period. We did not find an increase in massive PPH, or in invasive management, and we suspect that the rise can be at least partly explained by increased awareness and early intervention contributing to improved registration of severe PPH.
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Affiliation(s)
- Silje Pettersen
- Norwegian Research Centre for Women's Health, Oslo University Hospital, Box 4959, Nydalen, Oslo, 0424, Norway.
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
| | - Ragnhild Sørum Falk
- Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | - Siri Vangen
- Norwegian Research Centre for Women's Health, Oslo University Hospital, Box 4959, Nydalen, Oslo, 0424, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Lill Trine Nyfløt
- Norwegian Research Centre for Women's Health, Oslo University Hospital, Box 4959, Nydalen, Oslo, 0424, Norway
- Department of Obstetrics, Drammen Hospital, Drammen, Norway
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Pettersen S, Falk RS, Vangen S, Nyfløt LT. Peripartum hysterectomy due to severe postpartum hemorrhage: A hospital-based study. Acta Obstet Gynecol Scand 2022; 101:819-826. [PMID: 35388907 DOI: 10.1111/aogs.14358] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/14/2022] [Accepted: 03/23/2022] [Indexed: 11/27/2022]
Abstract
INTRODUCTION A peripartum hysterectomy is typically performed as a lifesaving procedure in obstetrics to manage severe postpartum hemorrhage. Severe hemorrhages that lead to peripartum hysterectomies are mainly caused by uterine atony and placenta accreta spectrum disorders. In this study, we aimed to estimate the incidence, risk factors, causes and management of severe postpartum hemorrhage resulting in peripartum hysterectomies, and to describe the complications of the hysterectomies. MATERIAL AND METHODS Eligible women had given birth at gestational week 23+0 or later and had a postpartum hemorrhage ≥1500 mL or a blood transfusion, due to postpartum hemorrhage, at Oslo University Hospital, Norway, between 2008 and 2017. Among the eligible women, this study included those who underwent a hysterectomy within the first 42 days after delivery. The Norwegian Medical Birth Registry provided the reference group. We used Poisson regression to estimate adjusted incidence rate ratios with 95% confidence intervals to identify clinical factors associated with peripartum hysterectomy. RESULTS The incidence of hysterectomies with severe postpartum hemorrhage was 0.44/1000 deliveries (42/96313). Among the women with severe postpartum hemorrhage, 1.6% ended up with a hysterectomy (42/2621). Maternal age ≥40, previous cesarean section, multiple pregnancy and placenta previa were associated with a significantly higher risk of hysterectomy. Placenta accreta spectrum disorders were the most frequent cause of hemorrhage that resulted in a hysterectomy (52%, 22/42) and contributed to most of the complications following the hysterectomy (11/15 women with complications). CONCLUSIONS The rate of peripartum hysterectomies at Oslo University Hospital was low, but was higher than previously reported from Norway. Risk factors included high maternal age, previous cesarean section, multiple pregnancy and placenta previa, well known risk factors for placenta accreta spectrum disorders and severe postpartum hemorrhage. Placenta accreta spectrum disorders were the largest contributor to hysterectomies and complications.
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Affiliation(s)
- Silje Pettersen
- Norwegian Research Center for Women's Health, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Ragnhild Sørum Falk
- Oslo Center for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | - Siri Vangen
- Norwegian Research Center for Women's Health, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Lill T Nyfløt
- Norwegian Research Center for Women's Health, Oslo University Hospital, Oslo, Norway.,Department of Obstetrics, Drammen Hospital, Drammen, Norway
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Pettersen S, Nyfløt L. 291. Trends of severe pph and maternal near misses during a 10-year period at oslo university hospital. Eur J Obstet Gynecol Reprod Biol 2022. [DOI: 10.1016/j.ejogrb.2021.11.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nyfløt LT, Sandven I, Stray-Pedersen B, Pettersen S, Al-Zirqi I, Rosenberg M, Jacobsen AF, Vangen S. Risk factors for severe postpartum hemorrhage: a case-control study. BMC Pregnancy Childbirth 2017; 17:17. [PMID: 28068990 PMCID: PMC5223545 DOI: 10.1186/s12884-016-1217-0] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 12/29/2016] [Indexed: 11/16/2022] Open
Abstract
Background In high-income countries, the incidence of severe postpartum hemorrhage (PPH) has increased. This has important public health relevance because severe PPH is a leading cause of major maternal morbidity. However, few studies have identified risk factors for severe PPH within a contemporary obstetric cohort. Methods We performed a case-control study to identify risk factors for severe PPH among a cohort of women who delivered at one of three hospitals in Norway between 2008 and 2011. A case (severe PPH) was classified by an estimated blood loss ≥1500 mL or the need for blood transfusion for excessive postpartum bleeding. Using logistic regression, we applied a pragmatic strategy to identify independent risk factors for severe PPH. Results Among a total of 43,105 deliveries occurring between 2008 and 2011, we identified 1064 cases and 2059 random controls. The frequency of severe PPH was 2.5% (95% confidence interval (CI): 2.32–2.62). The most common etiologies for severe PPH were uterine atony (60%) and placental complications (36%). The strongest risk factors were a history of severe PPH (adjusted OR (aOR) = 8.97, 95% CI: 5.25–15.33), anticoagulant medication (aOR = 4.79, 95% CI: 2.72–8.41), anemia at booking (aOR = 4.27, 95% CI: 2.79–6.54), severe pre-eclampsia or HELLP syndrome (aOR = 3.03, 95% CI: 1.74–5.27), uterine fibromas (aOR = 2.71, 95% CI: 1.69–4.35), multiple pregnancy (aOR = 2.11, 95% CI: 1.39–3.22) and assisted reproductive technologies (aOR = 1.88, 95% CI: 1.33–2.65). Conclusions Based on our findings, women with a history of severe PPH are at highest risk of severe PPH. As well as other established clinical risk factors for PPH, a history of severe PPH should be included as a risk factor in the development and validation of prediction models for PPH.
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Affiliation(s)
- Lill Trine Nyfløt
- Division of Gynecology and Obstetrics, Oslo University Hospital, Rikshospitalet, P.O.box 4950, Nydalen, 0424, Oslo, Norway. .,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. box 1171, Blindern, 0318, Oslo, Norway. .,Department of Gynecology and Obstetrics, Drammen Hospital, P.O.box 800, 3004, Drammen, Norway.
| | - Irene Sandven
- Oslo Centre of Biostatistics and Epidemiology, Research Support Services, Sogn Arena, P.O.box 4950, Nydalen, 0424, Oslo, Norway
| | - Babill Stray-Pedersen
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. box 1171, Blindern, 0318, Oslo, Norway
| | - Silje Pettersen
- Division of Gynecology and Obstetrics, Oslo University Hospital, Rikshospitalet, P.O.box 4950, Nydalen, 0424, Oslo, Norway
| | - Iqbal Al-Zirqi
- Division of Gynecology and Obstetrics, Oslo University Hospital, Rikshospitalet, P.O.box 4950, Nydalen, 0424, Oslo, Norway
| | - Margit Rosenberg
- Department of Gynecology and Obstetrics, Drammen Hospital, P.O.box 800, 3004, Drammen, Norway
| | - Anne Flem Jacobsen
- Division of Gynecology and Obstetrics, Oslo University Hospital, Rikshospitalet, P.O.box 4950, Nydalen, 0424, Oslo, Norway.,Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. box 1171, Blindern, 0318, Oslo, Norway
| | - Siri Vangen
- Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P.O. box 1171, Blindern, 0318, Oslo, Norway.,Norwegian National Advisory Unit on Women's Health, Oslo University Hospital, P.o.box 4950, Nydalen, 0424, Oslo, Norway
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Pettersen S. Addressing biochemical deficiencies in athletes for performance enhancement. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2010.081570.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Berge G, Boye K, Grotterød I, Rud A, Bettum I, Pettersen S, Øyjord T, Mælandsmo G. 381 Functional studies of gene products and signal transduction mechanisms involved in cancer progression and metastasis – influence of extracellular S100A4. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)71182-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Vevelstad M, Pettersen S, Tallaksen C, Brørs O. O-demethylation of codeine to morphine inhibited by low-dose levomepromazine. Eur J Clin Pharmacol 2009; 65:795-801. [DOI: 10.1007/s00228-009-0640-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Accepted: 02/18/2009] [Indexed: 10/21/2022]
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Hjortland GO, Bjørnland K, Pettersen S, Garman-Vik SS, Emilsen E, Nesland JM, Fodstad O, Engebraaten O. Modulation of glioma cell invasion and motility by adenoviral gene transfer of PAI-1. Clin Exp Metastasis 2003; 20:301-9. [PMID: 12856717 DOI: 10.1023/a:1024040718238] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A number of studies have emphasized the role of PAI-1 as an important regulator of tumor cell invasion and metastasis. The hallmark of primary tumors of the central nervous system and glioblastomas in particular is the diffuse invasion into the normal brain tissue. Since PAI-1 is expressed in such tumors, we studied the effect of adenoviral-mediated transfer of the PAI-1 gene in regulating the in vitro invasiveness of D54Mg glioma cells into Matrigel, and into fetal rat brain aggregates. Treatment of D54Mg cells with 50 MOI (multiplicity of infection) of the replication defective vector AdCMVPAI-1 increased PAI-1 expression 23-fold compared to control vectors, and the invasion through Matrigel was reduced by 67%. The motility of the cells was reduced by 58% compared to controls (indicating that inhibition of motility was the principal effect of PAI-1 in these cells). The ability of D54Mg tumor spheroids to invade fetal rat brain aggregates was not reduced by the PAI-1 gene transfer. The results show that overexpression of PAI-1 can inhibit glioma cell motility and invasion through extracellular matrix (ECM) components, like laminin and collagen, but does not inhibit tumor cell invasion in a three-dimensional invasion assay, simulating normal brain tissue having a different ECM and interstitial composition. The different results obtained in the two invasion assays reflect the complex biological effects of the uPA/PAI-1 system, and questions a simplistic view of PAI- I as an inhibitor of brain tumor invasion.
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Affiliation(s)
- G O Hjortland
- Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, University of Oslo, Montebello, Oslo, Norway.
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Bjørnland K, Rugnes E, Pettersen S, Johansen HT, Aasen AO, Fodstad Ø, Ree AH, Maelandsmo GM. Expression of matrix metalloproteinases and the metastasis-associated gene S100A4 in human neuroblastoma and primitive neuroectodermal tumor cells. J Pediatr Surg 2001; 36:1040-4. [PMID: 11431772 DOI: 10.1053/jpsu.2001.24735] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Matrix metalloproteinases (MMPs) and their endogenous inhibitors (tissue inhibitors of MMPs; TIMPs) have been shown to correlate with in vitro invasiveness and clinical outcome in several adult malignancies. The importance of MMP and TIMP expression in neuroblastoma (NB) and primitive neuroectodermal tumors (PNET) is incompletely understood. The aim of the current study was to relate in vitro invasion of NB and PNET cell lines with MMP and TIMP expression and evaluate the effect of a synthetic MMP inhibitor. Furthermore, S100A4 levels were determined because recent reports have suggested a possible association between MMPs, TIMPs, and the metastasis-associated gene S100A4. METHODS Expression of MMPs, TIMPs, and S100A4 was evaluated at both mRNA and protein levels in 2 human NB and 2 PNET cell lines. In vitro invasion and effects of the synthetic MMP inhibitor Marimastat were assessed in the Transwell chamber assay. RESULTS The most invasive cells expressed the highest levels of MMPs and S100A4. Marimastat reduced invasion by 30%. CONCLUSIONS In vitro invasion correlated with MMP and S100A4 expression. The fact that Marimastat reduced in vitro invasion is encouraging for further studies on a possible therapeutic application for proteinase inhibitors.
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Affiliation(s)
- K Bjørnland
- Institute for Surgical Research and the Department of Pediatric Surgery, The National Hospital, Oslo, Norway
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Abstract
The North Norwegian Health Net is a comprehensive scheme to connect all health-care institutions in the area to a national computer network. Services available include telemedicine, e-mail and Web access. A general practitioner has responsibility for ensuring that the clinical information is correct. Medical departments are responsible for the content of their own Web pages. All institutions require authorization before connection to ensure data protection and security. Changes in communication between primary- and secondary-care sectors are being monitored. To date the implementation of the network programme has gone smoothly.
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Affiliation(s)
- S Pettersen
- Department of Telemedicine, University Hospital of Tromsø, Norway
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Abstract
The combined action of phosphatidylcholine preferring phospholipase C (PC-PLC) and intracellular lipases has recently been shown to cause glycerol output in energy deprived rat cardiomyocytes. In the present study we examined the effect of hypothermia and rewarming on PC-PLC evoked glycerol output in freshly isolated, calcium-tolerant myocytes. The cells were preincubated for 60 min at hypothermic (5 degrees C) or normothermic (37 degrees C) conditions in Krebs-Henseleit bicarbonate buffer (pH 7.4) supplemented with 1 mM DL-carnitine, 1% B.S.A. and 5 mM glucose. Addition of PC-PLC resulted in a significantly higher (P less than 0.05) output of glycerol in myocytes undergoing rewarming than in myocytes kept constantly at 5 degrees C or 37 degrees C. The values obtained for PC-PLC induced glycerol output (difference in glycerol output between incubations with and without PC-PLC) were 6.77 +/- 2.6 (37 degrees C), 4.54 +/- 1.7 (5 degrees C) and 22.85 +/- 5.9 (5-37 degrees C) nmol/10(6) cells.h. Rewarming in addition caused a significantly higher (P less than 0.05) leakage of lactate dehydrogenase (LDH) from the rewarmed cells as compared to cells at constant temperatures (5 degrees C or 37 degrees C). However, there was no additional effect of PC-PLC on LDH leakage. The elevated PC-PLC induced glycerol output in rewarmed myocytes was not related to a fall in the percentage of rod-shaped cells or a reduced cellular content of ATP, since no differences could be detected between the various myocyte preparations with respect to these parameters.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- T K Steigen
- Department of Physiology, University of Tromsø, Norway
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Lin SZ, Sposito N, Pettersen S, Rybacki L, McKenna E, Pettigrew K, Fenstermacher J. Cerebral capillary bed structure of normotensive and chronically hypertensive rats. Microvasc Res 1990; 40:341-57. [PMID: 2084500 DOI: 10.1016/0026-2862(90)90032-m] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study cerebral capillary bed structure and the effects of chronic hypertension on these systems have been assessed in 6- to 7-month-old spontaneously hypertensive (SHR) and Wistar-Kyoto (WKY) rats. Capillary diameter (D), profile frequency (Na), volume fraction (Vv), and surface area (Sv) were quantitated by light microscopic morphometry of eight brain areas including the sensorimotor cortex and subfornical organ. Previously presented data from normotensive Sprague-Dawley rats (SpD) of similar age were also compared. Within each of the three rat strains, D, Na, Vv, and Sv varied among brain areas. For the sensorimotor cortex and subfornical organ, capillary profile frequency differed significantly among the three rat strains. In SHR and WKY, there was an inverse correlation between profile frequency and diameter, i.e., as Na increased among brain areas, D decreased. In six brain areas capillary volume fraction and surface area were identical in SHR and WKY, but were lower in SpD. Consistent differences between SHR and WKY were found only for the subfornical organ, which suggests some involvement of this structure in hypertension. Since there were few statistically significant differences between SHR and WKY and many statistically significant differences between the two normotensive strains, cerebral capillary bed structure seems to be independent of arterial blood pressure in most brain areas of these rats.
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Affiliation(s)
- S Z Lin
- Department of Neurological Surgery, State University of New York, Stony Brook 11794
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Abstract
Lens capsule and aqueous humour from cataractous eyes with and without pseudo-exfoliation syndrome have been studied by SDS-PAGE electrophoresis. Four cataractous lenses with and four without pseudo-exfoliation were used. The pseudo-exfoliation positive capsule revealed two polypeptides not present in the control material, and accordingly, these components were regarded to be pseudo-exfoliation specific. The molecular weight of the respective polypeptides was estimated to be 14,400 and 16,300. No marked differences were found between the pseudo-exfoliation positive and negative aqueous humours.
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Affiliation(s)
- A Ringvold
- Department of Ophthalmology, University of Oslo, Norway
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Abstract
The major hypothesis of this study is that there are differences among brain areas in capillary bed structure and function. Three general differences between circumventricular organ and non-CVO capillary beds were found. First, the PS products for AIB were about 300 times greater in CVO capillaries than in non-CVO (blood-brain barrier) capillaries. Second, the frequency of endothelial cell fenestrations was much greater in CVO capillaries than in non-CVO capillaries and the fenestrae may be structural modifications of endothelial cells that permit ready passage of solutes such as AIB. Third, the frequency of mitochondria was greater in BBB capillaries than in CVO capillaries; this high metabolic potential of BBB capillaries may be associated, in part, with "carrier-mediated" transport of various solutes between plasma and cerebral interstitial fluid. Capillary bed differences among all (i.e., both CVO and non-CVO) brain structures were also observed. Among these differences are: rate of blood flow, mean transit time of albumin, capillary volume and surface area, perfused microvessel blood volume, apparent percentage of perfused capillaries, PS products for AIB, and frequency within the endothelium of vesicular profiles.
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Affiliation(s)
- J Fenstermacher
- Department of Neurological Surgery, State University of New York, Stony Brook 11794-8122
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