Original volume: Examination papers for the Degree of Bachelor of Medicine by the University of Oxford (1864–1867). Original scanned volume, PDF page 99. Oxford, December 1867.
Original questions are transcribed from the public-domain edition. Credit: Wellcome Collection; original supplied by Royal College of Physicians, London. Source and public-domain rights statement.
The answers distinguish the terminology and therapeutic possibilities of 1867 from present medicine. They explain general anatomy, physiology and clinical reasoning; no individual patient or examination findings are assumed.
Original question.
What are the varieties of Dislocation of the Shoulder-joint, and what are the principles of treatment.
The chief historical varieties are subglenoid, subcoracoid, subclavicular and posterior shoulder dislocation; treatment restores the humeral head gently, checks the axillary nerve and circulation, and restores useful movement.
The glenohumeral joint combines a large humeral head with a shallow glenoid cavity. Its range of movement depends on the comparatively loose joint capsule; the glenoid labrum, rotator cuff and surrounding muscles provide stability. An injury can therefore lever the humeral head out of the glenoid cavity while tearing the joint capsule and sometimes the glenoid labrum or adjacent bone.
- In subglenoid shoulder dislocation, the humeral head lies below the glenoid cavity, toward the axilla. Old descriptions of displacement “downwards into the axilla” need not mean the persistently overhead arm position now called luxatio erecta.
- In subcoracoid shoulder dislocation, the humeral head lies in front of the glenoid cavity, beneath the coracoid process. This is the familiar anteroinferior pattern.
- In subclavicular shoulder dislocation, the humeral head has passed farther forwards and medially, beneath the clavicle; this is a rarer, more extensive anterior displacement.
- In posterior shoulder dislocation, historically also called subspinous displacement, the humeral head lies behind the glenoid cavity, toward the scapular spine. Modern assessment is particularly alert to this pattern after a seizure or electrical injury. True inferior shoulder dislocation, luxatio erecta, and exceptional superior displacement complete the directional classification; they should not be forced into the common anterior pattern.[ref]Shoulder Dislocations: Emergency Department by the Royal Children's Hospital Melbourne. Sections 3–4: anterior and posterior displacement and their mechanisms
An 1867 answer would stress early recognition, relaxation of the muscles, and controlled traction with suitable countertraction or gentle leverage to guide the humeral head through the torn joint capsule. Anaesthesia made relaxation practicable. These are principles, not a reason to reproduce old forceful manoeuvres or indiscriminate pulley traction: force can produce a fracture or damage the axillary artery and brachial plexus.
Current assessment establishes the direction and associated fracture, usually with radiography in appropriate views. Before and after joint reduction, record pulse, perfusion, distal movement and sensation, including sensation over the lateral deltoid muscle supplied by the axillary nerve. A nerve injury accompanying joint dislocation makes prompt restoration of alignment especially important.[ref]
Peripheral Nerve Injury by the British Orthopaedic Association. BOASt, response to identification of peripheral nerve injury, recommendation 5
Joint reduction is performed by trained clinicians with suitable analgesia and, when needed, sedation or anaesthesia. Repeated forceful attempts are inappropriate; irreducibility or associated complex fracture requires specialist management.[ref]After joint reduction, reassess the axillary nerve and circulation and confirm alignment and relevant fractures with radiography. A temporary sling relieves pain, followed by progressive physiotherapy to restore movement and rotator cuff function. The balance is between recurrent instability and stiffness: prolonged immobilisation is not a universal solution. Recurrent instability, significant structural injury and persistent weakness require further assessment.[ref]
Shoulder Dislocations: Emergency Department by the Royal Children's Hospital Melbourne. Sections 7–10: gentle reduction, repeat neurological examination, imaging and follow-up; this source specifically addresses children and adolescents
Original question.
Distinguish between Hydrocele and Scrotal Hernia.
A hydrocele contains fluid around the testis; a scrotal hernia contains abdominal contents that have descended through the inguinal canal. Their distinction rests on a combination of location, continuity with the inguinal canal, behaviour and light transmission.
The usual acquired hydrocele is a collection between the layers of the tunica vaginalis. A scrotal hernia is generally an indirect inguinal hernia: a sac of peritoneum, often containing intestine or omentum, follows the spermatic cord into the scrotum. Persistence of the processus vaginalis can permit either a communicating hydrocele or an indirect inguinal hernia, depending on the communication and its contents. Thus the underlying developmental route is related even though the usual clinical appearances differ.[ref]
Hydrocele by MedlinePlus. “Exams and Tests”: examination, light transmission, changes in swelling and imaging
- An uncomplicated hydrocele is typically smooth, fluctuant or tense, and confined to the scrotum. One can usually feel normal spermatic cord above it: one can “get above” the swelling. The testis may be difficult to feel separately and is usually behind the fluid collection. A scrotal hernia extends upwards toward the inguinal canal; its upper limit cannot usually be encircled within the scrotum.[ref]The Ship Captain's Medical Guide by the Maritime and Coastguard Agency. Chapter 7, p. 155, distinguishing continuity into the groin from a swelling confined to the scrotum
- A typical acquired hydrocele has neither an expansile cough impulse nor ready reduction into the abdomen. A reducible scrotal hernia enlarges on standing, coughing or straining, and diminishes on lying down or with gentle clinical reduction; intestine may give a gurgle. An irreducible hernia is an important exception, so failure of reduction does not establish hydrocele.
- For transillumination, a bright light is applied to one side of the swelling in a darkened setting while the examiner views the other side. Clear fluid in a thin-walled hydrocele usually transmits a diffuse glow. Most scrotal hernias do not. Blood, thick walls or an underlying tumour can prevent a hydrocele from transmitting light; apparent transmission alone cannot exclude a hernia, especially in a child.
- A longstanding uncomplicated hydrocele commonly produces heaviness rather than acute systemic illness. A painful, tender, irreducible scrotal hernia with vomiting or abdominal distension raises concern for intestinal obstruction or strangulated hernia, in which the blood supply of the trapped contents is compromised. That requires urgent surgical assessment.
If examination leaves doubt, ultrasonography can establish whether the swelling contains fluid, intestine or a solid tumour, assess the testis and show continuity with the inguinal canal. A collection may obscure a diseased testis; demonstrating fluid does not finish the diagnostic task. Blind puncture is not an appropriate diagnostic shortcut when a hernia remains possible. Even an established hydrocele usually reaccumulates after simple aspiration, which also risks infection.[ref]
Repair of a scrotal hydrocele by the British Association of Urological Surgeons. September 2024 leaflet, “Key points” and “What are the alternatives?”
Original question.
Classify the Tumours called ‘Malignant.’
An historically appropriate classification distinguishes the hard, soft, gelatinous, pigmented and epithelial malignant growths, together with recurrent and destructive growths whose place in “cancer” was disputed. Modern classification instead distinguishes tumours by cellular lineage and biological behaviour.
The quotation marks around “Malignant” matter. In 1867 the clinical grouping did not have a single settled boundary in histology. Infiltration, destructive growth, return after removal, spread to distant sites and progressive constitutional illness were warning features; hardness or rapid growth alone was not a sufficient definition. A contemporary review of an 1866 textbook explicitly disputed confused descriptions of hard and soft cancer, illustrating that this was already a live diagnostic controversy.[ref]
Review of Demonstrations of Microscopic Anatomy (1866 book). Discussion under “tumours”, contrasting scirrhus with encephaloid, melanotic and colloid growths and rejecting an indiscriminate use of “cancer”
A useful period classification, without pretending that every contemporary author drew the same boundaries, is:
- Scirrhous carcinoma, or hard cancer. Abundant firm fibrous supporting tissue makes a hard, often contracted growth, classically in the breast. Retraction and fixation reflect invasion and contraction of that supporting tissue. “Hard” describes the gross appearance; it is not a separate modern cellular lineage.
- Encephaloid cancer, or medullary/soft cancer. The name refers to soft, brain-like tissue, often richly cellular and prone to rapid growth, breakdown and haemorrhage. The historical label could include more than one modern diagnosis; it does not mean a tumour of the brain.
- Colloid cancer. A gelatinous appearance associated with abundant mucin. Some such lesions would now be classified as mucinous carcinomas; appearance alone cannot retrospectively determine their modern identity.
- Melanotic tumour. Dark pigment supplied a gross category. Many malignant examples belong to modern melanoma, arising from melanocytes, but pigmentation is neither necessary nor sufficient for melanoma. Pigmented examples could also be treated as varieties within other period categories.
- Epithelioma, or epithelial cancer. A growth exhibiting epithelial structure, especially at skin and mucous membrane surfaces. Many examples correspond to squamous cell carcinoma. A locally destructive rodent ulcer, now generally basal cell carcinoma, was sometimes separated because distant spread was unusual.
- Recurrent fibroid tumour and related “fibroplastic” or other sarcomas. These could return repeatedly and invade locally despite differing from the period's typical cancer. They were sometimes called semi-malignant. A reported 1866 recurrent fibroid tumour developed distant deposits after apparently successful local treatment: a vivid reason that a purely local category could fail.[ref]St George's Hospital Reports (1866). Case of recurrent fibroid tumour of the thigh, subsequent constitutional disease and post-mortem deposits; terminology is the report's historical terminology
Those are overlapping historical descriptive groups, not six mutually exclusive modern diagnoses. Nor does every growth historically called “sarcoma” meet the modern definition of sarcoma.
The modern organising principle asks what cells are malignant. Carcinoma arises from epithelium; sarcoma arises in bone or soft tissue; melanoma arises from melanocytes; lymphoma and leukaemia concern blood-forming or immune cells. Other families include central nervous system and germ cell tumours. A solid lump is not essential for cancer. Within a family, histology, immunohistochemistry and appropriate molecular diagnostics refine the diagnosis. Tumour grade describes features of aggressiveness, whereas tumour stage describes extent of disease.[ref]
This also corrects the old inference that recurrence must reflect a mysterious constitutional deposit: local residual disease and metastasis are distinct mechanisms, and an apparently circumscribed growth may already have disseminated.
Original question.
What are the modes adopted for the cure of Hæmorrhoids? Describe the most frequent causes of the affection.
Treat symptomatic haemorrhoids by correcting disordered defaecation and choosing an intervention suited to their position and severity. The main provoking factors are straining, constipation and disturbed bowel habits; pregnancy is another important setting.
Normal anal cushions contain vascular channels and supporting tissue and help seal the anal canal. Haemorrhoidal disease is symptomatic enlargement, bleeding or displacement of these cushions, not simply the presence of normal veins. Internal haemorrhoids originate above the dentate line; external haemorrhoids lie below it in sensitive skin. This explains why an uncomplicated internal lesion can bleed painlessly, while an acutely thrombosed external lesion can be very painful.[ref]
Management of Benign Anorectal Disorders by the American College of Gastroenterology (2021). “Hemorrhoids”, definitions: normal cushions, position relative to the dentate line and symptoms
Constipation with hard stools and repeated straining increases pressure and shearing stress in the anal canal. Prolonged sitting on the toilet and frequent abnormal bowel movements can aggravate symptoms. During pregnancy, pelvic venous congestion and constipation may contribute. Historical explanations often emphasised “congestion” from sedentary habits, abdominal pressure or obstructed venous return. These contain plausible mechanical observations but do not establish every old dietary or constitutional theory. In particular, portal hypertension can produce rectal varices, which must not be equated with ordinary haemorrhoids.
An 1867 surgical answer should distinguish relief of irritation from destruction or removal of the troublesome tissue. Measures then used included regulation of the bowels, avoidance of straining, local cleansing and soothing or astringent applications, and reduction of a prolapsed internal mass where appropriate. Operative approaches included tying the base with a ligature so that the tissue sloughed, excision with control of haemorrhage, and destruction by a heated cautery or clamp-and-cautery apparatus. Historical chemical cauterisation belongs to the same destructive principle. These describe period practice; indiscriminate caustics, cutting without haemostasis and tissue strangulation below the dentate line are not a modern treatment scheme.[ref]
Review of The surgery of the rectum (1865 book). p. 369: the third lecture on haemorrhoids and prolapse describes the clamp method, confirming its use before this exam
In current care, increased dietary fibre, adequate fluid and better toilet habits are first-line measures; medicines may provide temporary symptom relief. Persistent internal haemorrhoids can be treated by rubber band ligation, sclerotherapy or infrared coagulation. Rubber band ligation interrupts the blood supply of a small portion above the dentate line and produces healing that fixes the displaced tissue. Advanced prolapse, substantial external disease or failure of less invasive treatment may justify haemorrhoidectomy; the operation must preserve enough intervening tissue to avoid anal stenosis.[ref]
The usual internal severity grades describe prolapse: grade I does not prolapse; grade II returns spontaneously; grade III needs manual replacement; grade IV cannot be reduced. These grades help select treatment but do not measure every patient's burden.[ref]
Diagnosis and treatment of hemorrhoids by the American Gastroenterological Association (2026). Table 1, classification by prolapse
Selected acutely thrombosed external haemorrhoids benefit from early excision; others settle with conservative treatment. A blanket promise of a permanent “cure” is inappropriate because recurrent provoking conditions and recurrent symptoms remain possible.[ref]Management of Hemorrhoids by the American Society of Colon and Rectal Surgeons (2024). Recommendations 5–7 and section on thrombosed external haemorrhoids
Finally, rectal bleeding must be investigated on its own merits. Examination, including inspection and suitable assessment of the anal canal, determines whether haemorrhoids explain the symptoms; other causes include colorectal cancer and inflammatory bowel disease. Persistent bleeding must not simply be labelled “piles”.[ref]
Diagnosis and treatment of hemorrhoids by the American Gastroenterological Association (2026). Anorectal examination, anoscopy and assessment of rectal bleeding
Original question.
What is Astigmatism? how is it detected? and how remedied ?
Astigmatism is a refractive error in which the eye's focusing power differs with direction. Detect its magnitude and axis by comparing directional focus; correct regular astigmatism with a suitably oriented cylindrical lens, adding a spherical lens when necessary.
For regular astigmatism, the two principal meridians of the eye are perpendicular and have different optical powers, commonly because the cornea has unequal curvatures. The crystalline lens can also contribute. A point object consequently does not form one sharp point image: the idealised paraxial optics gives two focal lines at different distances, perpendicular to one another, with an intervening region of blur. An ordinary spherical lens changes the focus in both meridians together and cannot by itself remove their difference. Irregular astigmatism, for example with a scarred cornea, lacks this simple pair of uniform principal powers.[ref]
Physiology of Astigmatism by the American Academy of Ophthalmology. Introduction and sections on regular and irregular astigmatism
Several complementary observations reveal it:
- With a distant point or suitable letter chart, an eye with astigmatism gives blur that cannot be completely removed with different spherical lenses. In a chart of equally dark radial lines, some directions can appear clearer or darker than others; unequal appearance suggests unequal directional focus, but does not alone supply a full prescription.
- A narrow stenopaic slit admits rays through a restricted meridian of the eye. Rotate the slit and determine the spherical lens giving best distant vision in each principal direction. A difference between the best powers demonstrates regular astigmatism. This is an especially natural optical explanation for an 1867 answer: it isolates directions rather than simply asking whether vision improves through a small round aperture.
- Modern objective retinoscopy observes the moving light reflex from the retina while trial lenses neutralise it in each meridian. Keratometry measures reflected images from the anterior cornea; corneal topography maps a larger area and helps detect irregularity. These measure different things: keratometry does not by itself include all contributions from the crystalline lens. Subjective refraction examination refines the prescription with trial lenses, often using a crossed-cylinder test.[ref]Assessment of visual function by the College of Optometrists (2025). Unit of Competence 7, objective retinoscopy and subjective refraction, including power and cylinder axis
The prescription must specify both the difference in optical power and its orientation. If the required correcting powers in the two principal directions are and , choose the cylinder axis along direction 1. In the ideal thin lens model:Here is the spherical correcting power, the cylindrical correcting power and the cylinder axis, all powers measured in dioptres. A cylindrical lens contributes no extra power along its axis and its full power perpendicular to that axis. For example, required corrections of and dioptres are supplied by a sphere of dioptre and a cylinder of dioptres, with its axis in the direction requiring the smaller negative correction. These are correcting powers, not the uncorrected eye's intrinsic powers; confusing the two reverses the intended correction.
Spectacles with this sphere-and-cylinder combination are the central historical remedy. Present options also include toric contact lenses, appropriate rigid contact lenses for some irregular cases, and selected refractive surgery. The suitability of these depends on the cause and condition of the cornea; a spectacle cylinder cannot generally cancel all irregularities of an irregular cornea.[ref]
Astigmatism by the National Eye Institute. Treatment options: spectacles, contact lenses and surgery; modern additions are not attributed to 1867
Original question.
What are the causes of Phlegmasia dolens, and how would you treat it ?
Phlegmasia alba dolens, the historical “white” or “milk” leg, is a painful, swollen limb associated with extensive deep vein thrombosis, particularly around childbirth. The modern priority is to identify venous thrombosis and prevent pulmonary embolism, not to treat an imagined accumulation of milk.
Obstruction of major pelvic or thigh veins raises pressure in the channels draining the limb; fluid then accumulates in the tissues as oedema. Severe outflow obstruction can also impede lymphatic drainage. The pale, tense appearance accounts for “alba”. It differs from phlegmasia cerulea dolens, in which more complete obstruction, including collateral channels, produces a congested blue limb and can threaten arterial perfusion. A historical case description cannot automatically be assigned one modern diagnosis solely from its name.
The central causal mechanisms are slowed venous flow, injury to the vessel wall and increased tendency of the blood to clot. Pregnancy promotes hypercoagulability and pelvic venous compression; childbirth can add tissue injury, immobility and infection. Prior venous thrombosis, thrombophilia, prolonged immobility, operative delivery and severe systemic illness further increase risk. It is not confined to the puerperium or even to women. The serious consequences are extension of the thrombus, detachment into the pulmonary arteries as a pulmonary embolism, and chronic obstruction or valvular damage producing post-thrombotic syndrome.[ref]
Diagnosis and treatment of venous thrombosis in pregnancy and after birth by the Royal College of Obstetricians and Gynaecologists. “Why is a DVT serious?” and risk factors before, during and after pregnancy
An historically informed explanation should recognise that nineteenth-century arguments concerned the relative importance of venous obstruction, phlebitis, lymphatic disease and puerperal illness. Rest, support and elevation of the limb, pain relief and local soothing applications belonged to the period's conservative repertoire. These could ease symptoms but did not provide effective anticoagulation. Neither the “milk leg” name nor the observation of puerperal infection establishes that every case is caused by milk displacement or by infected clot. The thrombotic and infective questions must be distinguished.
Current management begins with clinical assessment and compression ultrasonography. A normally patent vein collapses under appropriate transducer pressure; a thrombosed segment often fails to compress. Doppler ultrasonography adds information about flow, and suspected pelvic disease may require further imaging. A negative initial study does not close a strongly suspicious case; repeat or additional imaging may be needed. Fever and systemic illness prompt assessment for infection, while breathlessness, chest pain or collapse require urgent assessment for pulmonary embolism.[ref]
Diagnosis and treatment of venous thrombosis in pregnancy and after birth by the Royal College of Obstetricians and Gynaecologists. “How are DVT and PE diagnosed during pregnancy?”
Unless contraindicated, therapeutic low-molecular-weight heparin is the usual treatment during pregnancy. It limits further clot formation while the body's own processes deal with the existing thrombus; it is not an instant mechanical solvent. Management also provides analgesia, elevation and appropriate mobilisation once stable, with fitted compression for symptoms when suitable. Prolonged compulsory bed rest is not a general modern remedy. A threatened limb or suspected massive pulmonary embolism needs immediate specialist escalation; routine thrombolysis for every swollen leg would expose patients to unjustified haemorrhage.
For confirmed pregnancy-associated venous thromboembolism, treatment usually continues through the rest of pregnancy and for at least six weeks after birth, with at least three months' treatment in total; the delivery plan must account for bleeding and anaesthesia. Antibiotics address a demonstrated or strongly suspected infective complication, not uncomplicated venous thrombosis itself.[ref]
Thrombosis and Embolism during Pregnancy and the Puerperium: Acute Management by the Royal College of Obstetricians and Gynaecologists. Green-top Guideline 37b, sections 4–8 and 10: imaging, heparin, supportive measures, mobilisation and duration; 2015 guideline, still listed while an update is in development
Original question.
There is occasional Hæmorrhage from the Vagina during the last half of Pregnancy. Upon what causes may this depend? State the treatment to be adopted during the later months, and at or near the full term.
Recurrent bleeding in the second half of pregnancy particularly suggests placenta praevia, but placental abruption, vasa praevia, labour and local disease must also be considered. Treatment depends on the source, severity, maternal condition, fetal condition and gestational age.
The source's “last half” includes a wider interval than the definition of antepartum haemorrhage from 24 weeks used by the cited British guideline. No diagnosis follows from intermittency alone.
In placenta praevia, the placenta covers the internal opening of the cervix. Development of the lower uterine segment and opening of the cervix disturb attachment at the placental margin, exposing maternal vessels. Bleeding is often painless and recurrent and can become severe after apparently minor episodes. In placental abruption, a normally situated placenta separates prematurely. Bleeding into the placental bed reduces exchange with the fetus; pain, tenderness and increased tone of the uterus are suggestive, but their absence does not exclude it. Some blood can remain concealed, making visible vaginal loss a poor measure of total loss.
In vasa praevia, vulnerable fetal vessels run through the membranes near the internal cervical opening. Rupture, particularly when the membranes break, can cause rapid fetal blood loss while the mother remains comparatively stable. Other causes include a blood-stained cervical “show” in labour, cervical ectropion, a cervical polyp, local infection, trauma, and occasionally a tumour of the cervix or vagina. These must be distinguished from placental bleeding rather than presumed harmless from a small volume alone.[ref]
For an 1867 answer, the classic contrast is between “unavoidable” haemorrhage from placenta praevia and “accidental” haemorrhage from premature separation of a normally implanted placenta. The adjectives are historical classifications, not claims that either outcome is inevitable or that every placental abruption follows an accident. Period management sought to conserve maternal strength when slight bleeding settled, then accomplish delivery when recurrent loss or labour made waiting dangerous. For partial placenta praevia, rupture of membranes was used in suitable labour to bring the presenting part down against the bleeding region. For more extensive placenta praevia, vaginal plugging, dilation and turning to deliver the child were debated and used. Contemporary discussion shows disagreement about how long it was safe to temporise: an 1864 report describes both advocates of early delivery and arguments about plugs, dilating bags and turning.[ref]
Midwifery in the Edinburgh Medical Journal (September 1864). “On placenta praevia”, pp. 262–268, discussion of expectant intervals, premature delivery, plugging, membrane rupture and version
Those measures belong to the history of managing haemorrhage before modern operative safety, imaging and transfusion services. They must not be carried over as a modern algorithm: a vaginal plug can conceal continuing loss; attempted separation of the placenta or turning through placenta praevia can aggravate bleeding and endanger the fetus.
In current practice, the initial response to significant bleeding is hospital assessment with maternal resuscitation, monitoring, intravenous access and blood tests, with blood products available according to severity. Determine placental position by ultrasonography, assess the fetus according to gestational age, and look for local causes with appropriate examination. Do not perform a digital vaginal examination while placenta praevia remains a possible explanation until it has been excluded by ultrasonography. A carefully performed speculum examination and a skilled transvaginal ultrasound are different procedures; the latter is a safe, useful way to locate the placental edge. A normal ultrasound does not exclude placental abruption.[ref]
Antepartum Haemorrhage by the Royal College of Obstetricians and Gynaecologists. Sections 7.2–8.3: examination, avoidance of digital examination before excluding praevia, and limits of ultrasound for abruption
During the later preterm months, a stable mother and fetus after bleeding has stopped may be managed expectantly under specialist supervision. The plan includes surveillance, correction of anaemia, readiness to return urgently, and individual decisions about admission and timing of birth. Corticosteroids are considered when preterm delivery is likely; they do not treat the bleeding. Ongoing major haemorrhage, maternal instability or serious fetal compromise can require delivery regardless of immaturity. This is not a policy of waiting for full term at any cost.
At or near term, the cause determines the route. Persistent placenta praevia covering the internal cervical opening requires caesarean birth; repeated bleeding may require earlier delivery. Current 2026 guidance individualises timing for uncomplicated low-lying placenta or placenta praevia and advises considering planned birth no later than 37 weeks and 6 days. A low-lying placental edge that does not cover the opening requires individual assessment of whether vaginal birth is appropriate. These timings are present guidance, not an 1867 rule.[ref]
Placenta Praevia and Placenta Accreta Spectrum: Diagnosis and Management by the Royal College of Obstetricians and Gynaecologists (2026). Green-top Guideline 27a, key recommendations on placental location, timing and place of birth; fifth edition, published June 2026
With placental abruption, expedite delivery when indicated by maternal or fetal condition; caesarean birth is often required for a live compromised fetus when vaginal delivery is not imminent, while vaginal delivery may be appropriate in other circumstances. A local cervical lesion requires cause-specific management. Suspected rupture of vasa praevia is an emergency for urgent caesarean birth and neonatal resuscitation; an antenatally detected vasa praevia calls for planned birth before labour or membrane rupture.[ref]
Placenta praevia, placenta accreta and vasa praevia by the Royal College of Obstetricians and Gynaecologists. “What is vasa praevia?”: fetal origin of blood loss and urgent birth after suspected rupture
The central distinction is therefore safe observation of a settled, stable preterm episode versus timely delivery for an ongoing hazard, not a single remedy for every late-pregnancy bleed.Original question.
A retained placenta has failed to separate, has separated but become trapped, or is abnormally attached. It can cause postpartum haemorrhage and infection; treatment combines timely assessment, control of bleeding and safe removal, with a different strategy when placenta accreta spectrum is suspected.
After the fetus is born, contraction and retraction of the myometrium reduce the area of the placental bed. The placenta cannot shrink with it and normally separates through the maternal decidua. Continued contraction compresses the maternal vessels crossing the myometrium, providing an important mechanism of haemostasis. A fragment left attached can both expose bleeding vessels and interfere with effective contraction.
Three mechanisms organise the causes:
- Failure of separation, often associated with uterine atony. Exhaustion after prolonged labour, overdistension of the uterus and a full urinary bladder may impair effective contraction or expulsion. A detached placenta can also remain in a poorly contracting uterus.
- Entrapment after separation behind a closing cervix or constricted lower portion of the uterus. Nineteenth-century texts discussed “hour-glass contraction”, but the diagnosis was contested even then; not every trapped placenta proves that an hourglass-shaped partition has formed in the body of the uterus.
- Abnormal attachment, now classified within placenta accreta spectrum. Deficiency of the normal decidua at the attachment site allows abnormal adherence to, or invasion of, the myometrium. Previous uterine surgery is an important risk factor. A succenturiate placental lobe or fragment can also remain after the main placenta has been delivered, so an apparently expelled organ does not exclude retained tissue.
Consequences include immediate or delayed postpartum haemorrhage, hypovolaemic shock, anaemia, endometritis and sepsis. Retained fragments may delay normal shrinking of the uterus. Forceful pulling on the umbilical cord adds the risks of cord rupture and uterine inversion. Conversely, indiscriminate delay while bleeding continues can be fatal.
An 1867 answer would assess bleeding, the size and contraction of the uterus, whether separation had occurred and whether the outlet was obstructed. Emptying the urinary bladder, encouraging effective contraction and supporting the uterus were rational preliminary principles. If the placenta remained attached or trapped and the circumstances demanded intervention, manual removal with external support of the uterus was the principal operative resource. The historical difficulty was to distinguish a removable attachment from a dangerously adherent one. A September 1867 report describes an apparent “hour-glass” retention actually relieved by loosening a tight abdominal binder; it is useful evidence for examining the mechanism rather than trusting the diagnostic label.[ref]
Hour-glass contraction of the uterus simulated by the pressure of a narrow binder by William T. Greene (1867). British Medical Journal, 7 September 1867, p. 206: retained placenta after external constriction, followed by expulsion when the binder was loosened
The case is an observation, not proof that all retention has an external cause.Current care monitors blood loss and maternal condition, secures intravenous access and obtains skilled obstetric help. With active third-stage management, failure to complete the third stage of labour by 30 minutes is prolonged; with physiological management, the cited NICE threshold is 60 minutes. These thresholds do not justify waiting through active haemorrhage or instability. A trained clinician may use controlled cord traction with uterine counterpressure under appropriate conditions; unopposed pulling is not the same technique.[ref]
Intrapartum care by NICE. NG235, recommendations 1.10.20–1.10.28: prolonged third stage, intravenous access, uterotonics and anaesthesia for removal
When removal is required, examination and manual removal take place with appropriate anaesthesia, aseptic technique, external support and readiness to manage haemorrhage. The placenta and membranes are checked for completeness; persistent bleeding prompts assessment for retained fragments, uterine atony, trauma and disordered clotting. Antibiotic prophylaxis accompanies manual removal. Give uterotonics for associated postpartum haemorrhage and to maintain contraction after removal, rather than repeatedly giving them as a substitute for removing a retained organ in a non-bleeding patient. WHO's 2025 recommendations advise preparing for manual removal after 30 minutes if the placenta remains undelivered and distinguish this decision from treatment of established postpartum haemorrhage.[ref]
Consolidated guidelines for the prevention, diagnosis and treatment of postpartum haemorrhage by the World Health Organization (2025). Recommendations 30–31: uterotonics for retained placenta in the presence of haemorrhage, preparation for removal, and routine antibiotic prophylaxis
If no safe separation plane exists and placenta accreta spectrum is suspected, repeated forceful attempts to peel off the placenta can precipitate catastrophic haemorrhage. Escalate to an experienced multidisciplinary team and a haemorrhage plan. Definitive surgery, including hysterectomy, may be necessary; selected conservative management leaving the placenta in place requires specialist selection and follow-up. Current guidance explicitly advises avoiding attempted separation in women with a high probability of placenta accreta spectrum.[ref]
Placenta Praevia and Placenta Accreta Spectrum: Diagnosis and Management by the Royal College of Obstetricians and Gynaecologists (2026). Key recommendations on avoiding placental separation, specialist multidisciplinary care and follow-up when the placenta is left in situ
Thus the word “retained” identifies an urgent clinical problem, but the cause determines whether ordinary manual separation is safe. Articles by others on the same topic
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