Lawrence Impey's selected original research papers

Thakkar HS, Durell J, Chakraborty S, Tingle BL, Choi A, Fowler DJ, Gould SJ, Impey L, Lakhoo.
Antenatally Detected Congenital Pulmonary Airway Malformations: The Oxford Experience.
Eur J Pediatr Surg. 2016 Oct 10. [Epub ahead of print]

Bradshaw CJ, Thakkar H, Knutzen L, Marsh R, Pacilli M, Impey L, Lakhoo K.
Accuracy of prenatal detection of tracheoesophageal fistula and oesophageal atresia.
J Pediatr Surg. 2016 Aug;51(8):1268-72. doi: 10.1016/j.jpedsurg.2016.02.001.

Stevenson GN, Collins SL, Ding J, Impey L, Noble JA.
3-D Ultrasound Segmentation of the Placenta Using the Random Walker Algorithm: Reliability and Agreement.
Ultrasound Med Biol. 2015 Dec;41(12):3182-93. doi: 10.1016/j.ultrasmedbio.2015.07.021.

Bradshaw CJ, Thakkar H, Knutzen L, Marsh R, Pacilli M, Impey L, Lakhoo K.
Accuracy of prenatal detection of tracheoesophageal fistula and oesophageal atresia.
J Pediatr Surg. 2016 Aug;51(8):1268-72. doi: 10.1016/j.jpedsurg.2016.02.001. Epub 2016 Feb 8.

Collins SL, Stevenson GN, Al-Khan A, Illsley NP, Impey L, Pappas L, Zamudio S.
Three-Dimensional Power Doppler Ultrasonography for Diagnosing Abnormally Invasive Placenta and Quantifying the Risk.Obstet Gynecol. 2015 Sep;126(3):645-53. doi: 10.1097/AOG.0000000000000962.

Stevenson GN, Collins SL, Ding J, Impey L, Noble JA.
3-D Ultrasound Segmentation of the Placenta Using the Random Walker Algorithm: Reliability and Agreement.
Ultrasound Med Biol. 2015 Dec;41(12):3182-93. doi: 10.1016/j.ultrasmedbio.2015.07.021. Epub 2015 Sep 1.

Hemelaar J, Lim LN, Impey L.
The Impact of an ECV Service is Limited by Antenatal Breech Detection: A Retrospective Cohort Study.
Birth. 2015 Jun;42(2):165-72. doi: 10.1111/birt.12162. Epub 2015 Apr 15.

Knutzen L, Svirko E, Impey L.
The significance of base deficit in acidemic term neonates.
Am J Obstet Gynecol. 2015 Sep;213(3):373.e1-7. doi: 10.1016/j.ajog.2015.03.051.

Aye CY, Stevenson GN, Impey L, Collins SL.
Comparison of 2-D and 3-D estimates of placental volume in early pregnancy.
Ultrasound Med Biol. 2015 Mar;41(3):734-40. doi: 10.1016/j.ultrasmedbio.2014.10.001. Epub 2015 Jan 22.

Thakkar HS, Bradshaw C, Impey L, Lakhoo K.
Post-natal outcomes of antenatally diagnosed intra-abdominal cysts: a 22-year single-institution series.
Pediatr Surg Int. 2015 Feb;31(2):187-90. doi: 10.1007/s00383-014-3635-2. Epub 2014 Nov 16.

Stevenson GN, Collins SL, Welsh AW, Impey L, Noble JA.
A technique for the estimation of fractional moving blood volume by using three-dimensional power Doppler US.
Radiology. 2015 Jan;274(1):230-7. doi: 10.1148/radiol.14132363. Epub 2014 Aug 12.

SL Collins, GN Stevenson, JA Noble, L Impey.
Rapid calculation of standardised placental volume at 11-13 weeks and the prediction of the term, small for gestational age baby.
Ultrasound in Medicine and Biology (2013 Feb;39(2):253-60. 

S Collins, G Stevenson, A Noble, L Impey.
Developmental changes in spiral artery blood flow in the human placenta observed with colour Doppler ultrasonography
Placenta. 2012 Oct;33(10):782-7. Epub 2012 Jul 24.

P Yeh, K Emary, L Impey.
The relationship between umbilical cord arterial pH and serious adverse neonatal outcomes: analysis of 51 519 consecutive validated samples.
BJOG 2012; 119:824-831

Welsh AW, Collins SL, Stevenson GN, Noble JA, Impey L.
Inapplicability of fractional moving blood volume technique to standardize Virtual Organ Computer-aided AnaLysis indices for quantified three-dimensional power Doppler.
Ultrasound Obstet Gynecol. 2012 Dec;40(6):688-92. doi: 10.1002/uog.11139.

Collins SL, Birks JS, Stevenson GN, Papageorghiou AT, Noble JA, Impey L.
Measurement of spiral artery jets: general principles and differences observed in small-for-gestational-age pregnancies.
Ultrasound Obstet Gynecol. 2012 Aug;40(2):171-8. doi: 10.1002/uog.10149.

Collins SL, Stevenson GN, Noble JA, Impey L, Welsh AW.
Influence of power Doppler gain setting on Virtual Organ Computer-aided AnaLysis indices in vivo: can use of the individual sub-noise gain level optimize information?
Ultrasound Obstet Gynecol. 2012 Jul;40(1):75-80. doi: 10.1002/uog.10122.

M Gupta, C Hockley, M Quigley, P Yeh, L Impey.
Antepartum and intrapartum risk factors for shoulder dystocia.
European Journal of Obstetrics and Gynaecology and Reproductive Biology 2010; 151: 134-8 

A Mears, J Sadiq, L Impey, K Lakhoo.
Antenatal bowel dilatation in gastroschisis: a bad sign?
Pediatr Surg Int. 2010; 26: 581-8. (epub 2010 Apr 24).

M. Gupta, K. Emary, L Impey
Emergency cervical cerclage: predictors of success
Journal of Maternal-Fetal and Neonatal Medicine 2010;23: 670-4

G. Patel, J. Sadiq, N. Shenker, L.Impey, K Lakhoo.
Neonatal Survival of antenatally diagnosed exomphalos
Paediatric Surgery International 2009; 25: 413-6. (epub 2009 Mar 26).

R. Brettell, P. Yeh, L. Impey
The association between fetal gender and preterm delivery
European Journal of Obstetrics and Gynaecology and Reproductive Biology 2008; 141: 123-6

L. Impey, C. Greenwood, R. Black, P. Yeh, O Sheil, P. Doyle.
The relationship between intrapartum maternal fever and acidosis as risk factors for neonatal encephalopathy
American Journal of Obstetrics and Gynecology 2008; 198: 49.e1-6.

E. Svirko, J. Mellanby, L. Impey
The association between cord pH at birth and intellectual function in childhood
Early Human Development 2008; 84: 37-41

P. Patel, J. Farley, L. Impey, K. Lakhoo 
Evaluation of a fetomaternal-surgical clinic for prenatal counselling of surgical anomalies
Paediatric Surgery International 2008; 24: 

S. Collins, P. Ellaway, D. Harrington, M. Pandit, L. Impey
The complications of external cephalic version: results from 805 consecutive attempts
BJOG 2007 114: 636-8

L. Impey, M. Pandit 
Tocolysis for repeat external cephalic version after a failed version for breech presentation at term: a randomised double-blind placebo controlled trial’
BJOG 2005; 112: 627-31

C. Greenwood, P. Yudkin, S. Sellers, L.Impey, P. Doyle
Why is there a modifying effect of gestational age on risk factors for cerebral palsy?
Archives of Disease in Childhood Fetal and Neonatal Edition 2005; 90: F141-F146

L. Impey, K. MacQuillan, M. Reynolds, S. Gates, J. Murphy, O. Sheil 
Admission cardiotocography: a randomised controlled trial
The Lancet 2003; 361: 465-70

C. Greenwood, S. Lalchandani, K. MacQuillan, O. Sheil, J.Murphy, L. Impey
Meconium passed in labor: how reassuring is clear amniotic fluid?
Obstetrics and Gynecology 2003; 102: 89-93

C. Greenwood, S. Newman, L.Impey, A. Johnson
Cerebral palsy and clinical negligence litigation: a cohort study
BJOG 2003; 110: 6-11

C. Greenwood, L. Impey
The association of nuchal cord with cerebral palsy is influenced by recording bias
Early Human Development 2002; 68:15

L. Impey, C Greenwood, K. MacQuillan, M. Reynolds, O. Sheil
Maternal fever and neonatal encephalopathy: a prospective cohort study
British Journal of Obstetrics and Gynaecology 2001; 108: 594-7

L. Impey, C Greenwood, O. Sheil, K. MacQuillan, M. Reynolds, C. Redman
The relationship between pre-eclampsia at term and neonatal encephalopathy
Archives of Diseases in Childhood, Fetal and Neonatal Edition 2001; 85: F170-2

L. Impey, M.Robson, K. MacQuillan
Epidural analgesia need not affect operative delivery rates
American Journal of Obstetrics and Gynecology 2000; 182: 358-63

L. Impey, J. Hobson, C. O’Herlihy
The graphic analysis of active management of labor: prospective computation of labor progress in 500 consecutive nulliparous women in spontaneous labour at term
American Journal of Obstetrics and Gynecology 2000; 183: 438-43

L. Impey, D. Lissoni
Outcome of external cephalic version after 36 weeks’ gestation without tocolysis
Journal of Maternal-Fetal Medicine 1999; 8: 203-7

L. Impey, C.O’Herlihy
First delivery after strictly defined cephalopelvic disproportion’
Obstetrics and Gynecology 1998; 92: 799-803

L. Impey, J.Hughes
Abdominal pain in Pregnancy: who needs to be admitted? Admissions in a district general hospital in one year.
Journal of Obstetrics and Gynaecology 1995; 15: 363-5

P. Bryant, L.Impey
The similarities between normal readers and developmental and acquired dyslexics
Cognition 1986; 24:12-25 (Citation classic)