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  1. Article: Chronic pain treatment with pregabalin in end stage respiratory failure patients awaiting lung transplantation on ambulatory veno-venous extra corporeal membrane oxygenator support; a series of nine cases.

    Sarridou, D G / Boutou, A K / Konstantinidou, M / Cox, F / Argiriadou, H / Walker, C P

    Hippokratia

    2024  Volume 27, Issue 1, Page(s) 22–24

    Abstract: Background: End-stage respiratory failure is non-treatable with mechanical ventilation and can be treated with veno-venous extracorporeal membrane oxygenators (VV-ECMO). It can also be used as a bridge to lung transplantation or recovery of lung ... ...

    Abstract Background: End-stage respiratory failure is non-treatable with mechanical ventilation and can be treated with veno-venous extracorporeal membrane oxygenators (VV-ECMO). It can also be used as a bridge to lung transplantation or recovery of lung function. This patient group can suffer from chronic pain, which is further exacerbated by painful procedures required as part of treatment. Pregabalin is licensed for chronic neuropathic pain and generalized anxiety disorder. Thus far, it has not been tried in routine analgesia protocols for pain relief of patients on VV-ECMO.
    Case series: We included nine patients aged 17-54 years on VV-ECMO awaiting lung transplantation. Exclusion criteria were acute kidney injury and chronic kidney disease. All patients had morphine patient-control analgesia. In addition, pregabalin 50 mg twice daily was initiated in all patients with dose escalation as required. Pain scores and quality of sleep were evaluated daily. All patients experienced significant pain relief, demonstrated by reduced pain scores after treatment commencement. The mean visual analogue scale score was reduced significantly from 6 ± 2 to 3 ± 1. A significant increase in good-quality sleep duration was recorded from 5 ± 1.7 hours per day before to 8 ± 2.1 hours per day after pregabalin treatment. All patients except for two reported reduced anxiety levels of at least 2 ± 1 scale improvement (p <0.05).
    Conclusions: Pregabalin is an efficient analgesic with accompanying anxiolytic effects in this group of patients with unique characteristics such as high analgesia requirements and exacerbated psychological and emotional stress. HIPPOKRATIA 2023, 27 (1):22-24.
    Language English
    Publishing date 2024-03-02
    Publishing country Greece
    Document type Case Reports
    ZDB-ID 2491943-3
    ISSN 1790-8019 ; 1108-4189
    ISSN (online) 1790-8019
    ISSN 1108-4189
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Behavior of the Siemens Virtual Wedge following an interruption to beam delivery.

    Richmond, N D / Walker, C P

    Journal of applied clinical medical physics

    2003  Volume 4, Issue 2, Page(s) 120–123

    Abstract: Investigations were made into the beam profile shape and dose delivered by the Siemens Virtual Wedge trade mark under standard operational conditions compared with those following delivery interruption on two Siemens Primus linear accelerators (Type 7445 ...

    Abstract Investigations were made into the beam profile shape and dose delivered by the Siemens Virtual Wedge trade mark under standard operational conditions compared with those following delivery interruption on two Siemens Primus linear accelerators (Type 7445 and 8067) running different versions of control software (7.2 and 7.0, respectively). The shape of the Virtual Wedge trade mark profiles was found to be unaffected by beam delivery interruption. An increase in the dose delivered to the central axis was found when delivery was interrupted and subsequently resumed using information recorded in a recall data file on one of the accelerators. This dose increase was attributed to a difference in delivered monitor units recorded in the recall data file compared to those displayed on the linear accelerator control console.
    MeSH term(s) Humans ; Radiotherapy, Computer-Assisted/methods ; Radiotherapy, High-Energy/methods
    Language English
    Publishing date 2003
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 2010347-5
    ISSN 1526-9914 ; 1526-9914
    ISSN (online) 1526-9914
    ISSN 1526-9914
    DOI 10.1120/jacmp.v4i2.2526
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Thrombin generation and its inhibition: a review of the scientific basis and mechanism of action of anticoagulant therapies.

    Walker, C P R / Royston, D

    British journal of anaesthesia

    2002  Volume 88, Issue 6, Page(s) 848–863

    MeSH term(s) Anticoagulants/pharmacology ; Blood Coagulation/drug effects ; Blood Coagulation/physiology ; Heparin/pharmacology ; Humans ; Thrombin/antagonists & inhibitors ; Thrombin/biosynthesis ; Thrombin/physiology
    Chemical Substances Anticoagulants ; Heparin (9005-49-6) ; Thrombin (EC 3.4.21.5)
    Language English
    Publishing date 2002-04-30
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 80074-0
    ISSN 1471-6771 ; 0007-0912
    ISSN (online) 1471-6771
    ISSN 0007-0912
    DOI 10.1093/bja/88.6.848
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Positioning accuracy for lung stereotactic body radiotherapy patients determined by on-treatment cone-beam CT imaging.

    Richmond, N D / Pilling, K E / Peedell, C / Shakespeare, D / Walker, C P

    The British journal of radiology

    2012  Volume 85, Issue 1014, Page(s) 819–823

    Abstract: Stereotactic body radiotherapy for early stage non-small cell lung cancer is an emerging treatment option in the UK. Since relatively few high-dose ablative fractions are delivered to a small target volume, the consequences of a geometric miss are ... ...

    Abstract Stereotactic body radiotherapy for early stage non-small cell lung cancer is an emerging treatment option in the UK. Since relatively few high-dose ablative fractions are delivered to a small target volume, the consequences of a geometric miss are potentially severe. This paper presents the results of treatment delivery set-up data collected using Elekta Synergy (Elekta, Crawley, UK) cone-beam CT imaging for 17 patients immobilised using the Bodyfix system (Medical Intelligence, Schwabmuenchen, Germany). Images were acquired on the linear accelerator at initial patient treatment set-up, following any position correction adjustments, and post-treatment. These were matched to the localisation CT scan using the Elekta XVI software. In total, 71 fractions were analysed for patient set-up errors. The mean vector error at initial set-up was calculated as 5.3 ± 2.7 mm, which was significantly reduced to 1.4 ± 0.7 mm following image guided correction. Post-treatment the corresponding value was 2.1 ± 1.2 mm. The use of the Bodyfix abdominal compression plate on 5 patients to reduce the range of tumour excursion during respiration produced mean longitudinal set-up corrections of -4.4 ± 4.5 mm compared with -0.7 ± 2.6 mm without compression for the remaining 12 patients. The use of abdominal compression led to a greater variation in set-up errors and a shift in the mean value.
    MeSH term(s) Carcinoma, Non-Small-Cell Lung/diagnostic imaging ; Carcinoma, Non-Small-Cell Lung/surgery ; Cone-Beam Computed Tomography ; Humans ; Lung Neoplasms/diagnostic imaging ; Lung Neoplasms/surgery ; Patient Positioning/standards ; Radiosurgery/methods
    Language English
    Publishing date 2012-05-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2982-8
    ISSN 1748-880X ; 0007-1285
    ISSN (online) 1748-880X
    ISSN 0007-1285
    DOI 10.1259/bjr/54341099
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  5. Article: Comparison of laryngeal mask and intubating laryngeal mask insertion by the naïve intubator.

    Jaggar, S I / Walker, C P

    British journal of anaesthesia

    2000  Volume 84, Issue 6, Page(s) 823–824

    MeSH term(s) Clinical Competence ; Humans ; Intubation, Intratracheal/methods ; Laryngeal Masks
    Language English
    Publishing date 2000-06
    Publishing country England
    Document type Comment ; Comparative Study ; Letter
    ZDB-ID 80074-0
    ISSN 1471-6771 ; 0007-0912
    ISSN (online) 1471-6771
    ISSN 0007-0912
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Optimal clinical implementation of the Siemens virtual wedge.

    Walker, C P / Richmond, N D / Lambert, G D

    Medical dosimetry : official journal of the American Association of Medical Dosimetrists

    2003  Volume 28, Issue 3, Page(s) 149–154

    Abstract: Installation of a modern high-energy Siemens Primus linear accelerator at the Northern Centre for Cancer Treatment (NCCT) provided the opportunity to investigate the optimal clinical implementation of the Siemens virtual wedge filter. Previously ... ...

    Abstract Installation of a modern high-energy Siemens Primus linear accelerator at the Northern Centre for Cancer Treatment (NCCT) provided the opportunity to investigate the optimal clinical implementation of the Siemens virtual wedge filter. Previously published work has concentrated on the production of virtual wedge angles at 15 degrees, 30 degrees, 45 degrees, and 60 degrees as replacements for the Siemens hard wedges of the same nominal angles. However, treatment plan optimization of the dose distribution can be achieved with the Primus, as its control software permits the selection of any virtual wedge angle from 15 degrees to 60 degrees in increments of 1 degrees. The same result can also be produced from a combination of open and 60 degrees wedged fields. Helax-TMS models both of these modes of virtual wedge delivery by the wedge angle and the wedge fraction methods respectively. This paper describes results of timing studies in the planning of optimized patient dose distributions by both methods and in the subsequent treatment delivery procedures. Employment of the wedge fraction method results in the delivery of small numbers of monitor units to the beam's central axis; therefore, wedge profile stability and delivered dose with low numbers of monitor units were also investigated. The wedge fraction was proven to be the most efficient method when the time taken for both planning and treatment delivery were taken into consideration, and is now used exclusively for virtual wedge treatment delivery in Newcastle. It has also been shown that there are no unfavorable dosimetric consequences from its practical implementation.
    MeSH term(s) Humans ; Particle Accelerators ; Radiometry ; Radiotherapy Planning, Computer-Assisted ; Radiotherapy, High-Energy
    Language English
    Publishing date 2003
    Publishing country United States
    Document type Journal Article
    ZDB-ID 645065-9
    ISSN 0958-3947 ; 0739-0211
    ISSN 0958-3947 ; 0739-0211
    DOI 10.1016/S0958-3947(03)00065-7
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  7. Article: In defence of paravertebral blockade.

    Walker, C P R / Gaunt, A / Wall, N C

    British journal of anaesthesia

    2002  Volume 88, Issue 5, Page(s) 743–4; author reply 744

    MeSH term(s) Analgesia/methods ; Analgesics, Opioid/administration & dosage ; Humans ; Injections, Spinal ; Pain, Postoperative/drug therapy ; Thoracotomy
    Chemical Substances Analgesics, Opioid
    Language English
    Publishing date 2002-05
    Publishing country England
    Document type Comment ; Letter
    ZDB-ID 80074-0
    ISSN 1471-6771 ; 0007-0912
    ISSN (online) 1471-6771
    ISSN 0007-0912
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  8. Article: Acute pulmonary edema after percutaneous balloon valvuloplasty for pulmonary valve stenosis.

    Walker, C P / Bateman, C J / Rigby, M L / Brookes, C I

    Journal of cardiothoracic and vascular anesthesia

    2001  Volume 15, Issue 4, Page(s) 480–482

    MeSH term(s) Acute Disease ; Aged ; Catheterization/adverse effects ; Humans ; Male ; Pulmonary Edema/diagnosis ; Pulmonary Edema/etiology ; Pulmonary Edema/therapy ; Pulmonary Valve Stenosis/diagnostic imaging ; Pulmonary Valve Stenosis/therapy ; Radiography
    Language English
    Publishing date 2001-08
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 1067317-9
    ISSN 1532-8422 ; 1053-0770
    ISSN (online) 1532-8422
    ISSN 1053-0770
    DOI 10.1053/jcan.2001.24998
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Removal and inactivation of enveloped and non-enveloped viruses during the purification of a high-purity factor IX by metal chelate affinity chromatography.

    Roberts, P L / Walker, C P / Feldman, P A

    Vox sanguinis

    1994  Volume 67 Suppl 1, Page(s) 69–71

    Abstract: Virus reduction during the copper chelate affinity chromatography stage used during the purification of a new high-purity factor IX (BPLs 9MC) has been investigated. Virus reduction for the enveloped virus Sindbis was 6.5 log, a value which included ... ...

    Abstract Virus reduction during the copper chelate affinity chromatography stage used during the purification of a new high-purity factor IX (BPLs 9MC) has been investigated. Virus reduction for the enveloped virus Sindbis was 6.5 log, a value which included approximately 2 log of inactivation due to the use of an acidic wash buffer (pH 4.4) during chromatography. In the case of the non-enveloped hepatitis-A-like poliovirus, which is acid-resistant, the virus reduction value was 4.0 log and was exclusively due to physical virus removal during the chromatographic process.
    MeSH term(s) Chelating Agents ; Chromatography, Affinity/methods ; Copper ; Drug Contamination/prevention & control ; Factor IX/isolation & purification ; Humans ; Plasma/microbiology ; Poliovirus ; Sindbis Virus ; Viral Envelope Proteins
    Chemical Substances Chelating Agents ; Viral Envelope Proteins ; Copper (789U1901C5) ; Factor IX (9001-28-9)
    Language English
    Publishing date 1994
    Publishing country England
    Document type Journal Article
    ZDB-ID 80313-3
    ISSN 1423-0410 ; 0042-9007
    ISSN (online) 1423-0410
    ISSN 0042-9007
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  10. Article: Case report: rhabdomyolysis following grand mal seizures presenting as a delayed and increasingly dense nephrogram.

    Walker, C P / Duddy, M J / Sagar, G

    Clinical radiology

    1993  Volume 47, Issue 2, Page(s) 139–140

    Abstract: Rhabdomyolysis as a result of major trauma is a well recognized cause of acute renal failure. Non-traumatic rhabdomyolysis causing transient renal impairment may occur following generalized convulsions. We present a case in which rhabdomyolysis following ...

    Abstract Rhabdomyolysis as a result of major trauma is a well recognized cause of acute renal failure. Non-traumatic rhabdomyolysis causing transient renal impairment may occur following generalized convulsions. We present a case in which rhabdomyolysis following epilepsy was first indicated at urography by a delayed and increasingly dense persistent nephrogram.
    MeSH term(s) Acute Kidney Injury/diagnostic imaging ; Acute Kidney Injury/etiology ; Contrast Media ; Epilepsy, Tonic-Clonic/complications ; Humans ; Male ; Middle Aged ; Radiography ; Rhabdomyolysis/etiology
    Chemical Substances Contrast Media
    Language English
    Publishing date 1993-02
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 391227-9
    ISSN 1365-229X ; 0009-9260
    ISSN (online) 1365-229X
    ISSN 0009-9260
    DOI 10.1016/s0009-9260(05)81192-4
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