at the Fitzsimons Army Medical Center.]]
Surgery (from the cheirourgikē, via , meaning "hand work") is an ancient medical specialty that uses operative manual and instrumental techniques on a patient to investigate and/or treat a pathological condition such as disease or injury, to help improve bodily function or appearance, and sometimes for religious reasons. An act of performing surgery may be called a surgical procedure, operation, or simply surgery. In this context, the verb operate means performing surgery. The adjective surgical means pertaining to surgery; e.g. surgical instruments or surgical nurse. The patient or subject on which the surgery is performed can be a person or an animal. A surgeon is a person who performs operations on patients. In rare cases, surgeons may operate on themselves. Persons described as surgeons are commonly physicians, but the term is also applied to podiatric physicians, dentists (or known as oral and maxillofacial surgeon) and veterinarians. Surgery can last from minutes to hours, but is typically not an ongoing or periodic type of treatment.
The term surgery can also refer to the place where surgery is performed, or simply the office of a physician, dentist / oral and maxillofacial surgeon, or veterinarian.
Definitions of surgery
Surgery is a technology consisting of a physical intervention on tissues.
As a general rule, a procedure is considered surgical when it involves cutting of a patient's tissues or closure of a previously sustained wound. Other procedures that do not necessarily fall under this rubric, such as angioplasty or endoscopy, may be considered surgery if they involve "common" surgical procedure or settings, such as use of a sterile environment, anesthesia, antiseptic conditions, typical surgical instruments, and suturing or stapling. All forms of surgery are considered invasive procedures; so-called "noninvasive surgery" usually refers to an excision that does not penetrate the structure being excised (e.g. laser ablation of the cornea) or to a radiosurgical procedure (e.g. irradiation of a tumor).
Types of surgery
Surgical procedures are the commonly categorized by urgency, type of procedure, body system involved, degree of invasiveness, and special instrumentation.
Based on timing: Elective surgery is done to correct a non-life-threatening condition, and is carried out at the patient's request, subject to the surgeon's and the surgical facility's availability. Emergency surgery is surgery which must be done promptly to save life, limb, or functional capacity. A semi-elective surgery is one that must be done to avoid permanently disability or death, but can be postponed for a short time.
Based on purpose: Exploratory surgery is performed to aid or confirm a diagnosis. Therapeutic surgery treats a previously diagnosed condition.
By type of procedure: Amputation involves cutting off a body part, usually a limb or digit. Replantation involves reattaching a severed body part. Reconstructive surgery involves reconstruction of an injured, mutilated, or deformed part of the body. Cosmetic surgery is done to improve the appearance of an otherwise normal structure. Excision is the cutting out of an organ, tissue, or other body part from the patient. Transplant surgery is the replacement of an organ or body part by insertion of another from different human (or animal) into the patient. Removing an organ or body part from a live human or animal for use in transplant is also a type of surgery.
By body part: When surgery is performed on one organ system or structure, it may be classed by the organ, organ system or tissue involved. Examples include cardiac surgery (performed on the heart), gastrointestinal surgery (performed within the digestive tract and its accessory organs), and orthopedic surgery (performed on bones and/or muscles).
By degree of invasiveness: Minimally invasive surgery involves smaller outer incision(s) to insert miniaturized instruments within a body cavity or structure, as in laparoscopic surgery or angioplasty. By contrast, an open surgical procedure or laparotomy requires a large incision to access the area of interest.
By equipment used: Laser surgery involves use of a laser for cutting tissue instead of a scalpel or similar surgical instruments. Microsurgery involves the use of an operating microscope for the surgeon to see small structures. Robotic surgery makes use of a surgical robot, such as the Da Vinci or the Zeus surgical systems, to control the instrumentation under the direction of the surgeon.
Terminology
surgery names often start with a name for the organ to be excised (cut out) and end in -ectomy.
Procedures involving cutting into an organ or tissue end in -otomy. A surgical procedure cutting through the abdominal wall to gain access to the abdominal cavity is a laparotomy.
Minimally invasive procedures involving small incisions through which an endoscope is inserted end in -oscopy. For example, such surgery in the abdominal cavity is called laparoscopy.
Procedures for formation of a permanent or semi-permanent opening called a stoma in the body end in -ostomy.
Reconstruction, plastic or cosmetic surgery of a body part starts with a name for the body part to be reconstructed and ends in -oplasty. Rhino is used as a prefix for "nose", so rhinoplasty is basically reconstructive or cosmetic surgery for the nose.
Reparation of damaged or congenital abnormal structure ends in -rraphy. Herniorraphy is the reparation of a hernia, while perineorraphy is the reparation of perineum.
Description of surgical procedure
At a
hospital, modern surgery is often done in an
operating theater using
surgical instruments, an
operating table for the patient, and other equipment. The environment and procedures used in surgery are governed by the principles of
aseptic technique: the strict separation of "sterile" (free of microorganisms) things from "unsterile" or "contaminated" things. All surgical instruments must be
sterilized, and an instrument must be replaced or re-sterilized if it becomes contaminated (i.e. handled in an unsterile manner, or allowed to touch an unsterile surface). Operating room staff must wear sterile attire (
scrubs, a scrub cap, a sterile surgical gown, sterile latex or non-latex polymer gloves and a surgical mask), and they must scrub hands and arms with an approved disinfectant agent before each procedure.
Prior to surgery, the patient is given a medical examination, certain pre-operative tests, and their physical status is rated according to the ASA physical status classification system. If these results are satisfactory, the patient signs a consent form and is given a surgical clearance. If the procedure is expected to result in significant blood loss, an autologous blood donation may be made some weeks prior to surgery. If the surgery involves the digestive system, the patient may be instructed to perform a bowel prep by drinking a solution of polyethylene glycol the night before the procedure. Patients are also instructed to abstain from food or drink (an NPO order after midnight on the night before the procedure, to minimize the effect of stomach contents on pre-operative medications and reduce the risk of aspiration if the patient vomits during or after the procedure.
In the pre-operative holding area, the patient changes out of his or her street clothes and is asked to confirm the details of his or her surgery. A set of vital signs are recorded, a peripheral IV line is placed, and pre-operative medications (antibiotics, sedatives, etc.) are given. When the patient enters the operating room, the skin surface to be operated on, called the operating field, is cleaned and prepared by applying an antiseptic such as chlorhexidine gluconate or povidone-iodine to reduce the possibility of infection. If hair is present at the surgical site, it is clipped off prior to prep application. The patient is assisted by an anesthesiologist or resident to make a specific surgical position, then sterile drapes are used to cover all of the patient's body except for the head and the surgical site or at least a wide area surrounding the operating field; the drapes are clipped to a pair of poles near the head of the bed to form an "ether screen", which separates the anesthetist/anesthesiologist's working area (unsterile) from the surgical site (sterile).
Anesthesia is administered to prevent pain from incision, tissue manipulation and suturing. Based on the procedure, anesthesia may be provided locally or as general anesthesia. Spinal anesthesia may be used when the surgical site is too large or deep for a local block, but general anesthesia may not be desirable. With local and spinal anesthesia, the surgical site is anesthetized, but the patient can remain conscious or minimally sedated. In contrast, general anesthesia renders the patient unconscious and paralyzed during surgery. The patient is intubated and is placed on a mechanical ventilator, and anesthesia is produced by a combination of injected and inhaled agents.
An incision is made to access the surgical site. Blood vessels may be clamped to prevent bleeding, and retractors may be used to expose the site or keep the incision open. The approach to the surgical site may involve several layers of incision and dissection, as in abdominal surgery, where the incision must traverse skin, subcutaneous tissue, three layers of muscle and then peritoneum. In certain cases, bone may be cut to further access the interior of the body; for example, cutting the skull for brain surgery or cutting the sternum for thoracic (chest) surgery to open up the rib cage.
Work to correct the problem in body then proceeds. This work may involve:
excision - cutting out an organ, tumor, Frail elderly patients (score of 4 or 5) have even worse outcomes, with the risk of being discharged to a nursing home rising to twenty times the rate for non-frail elderly people.
History
At least two prehistoric cultures had developed forms of surgery. The oldest for which there is evidence is
trepanation,
The Greek Galen was one of the greatest surgeons of the ancient world and performed many audacious operations — including brain and eye surgery — that were not tried again for almost two millennia.
In China, Hua Tuo was a famous Chinese physician during the Eastern Han and Three Kingdoms era who performed surgery with the aid of anesthesia.
In the Middle Ages, surgery was developed to a high degree in the Islamic world. Abulcasis (Abu al-Qasim Khalaf ibn al-Abbas Al-Zahrawi), an Andalusian-Arab physician and scientist who practised in the Zahra suburb of Córdoba, wrote medical texts that shaped European surgical procedures up until the Renaissance.
In Europe, the demand grew for surgeons to formally study for many years before practicing; universities such as Montpellier, Padua and Bologna were particularly renowned. Guy de Chauliac was one of the most eminent surgeons of the Middle Ages. His Chirurgia Magna or Great Surgery (1363) was a standard text for surgeons until well into the seventeenth century. By the fifteenth century at the latest, surgery had split away from physic as its own subject, of a lesser status than pure medicine, and initially took the form of a craft tradition until Rogerius Salernitanus composed his Chirurgia, laying the foundation for modern Western surgical manuals up to the modern time. Late in the nineteenth century, Bachelor of Surgery degrees (usually ChB) began to be awarded with the (MB), and the mastership became a higher degree, usually abbreviated ChM or MS in London, where the first degree was MB, BS.
Barber-surgeons generally had a bad reputation that was not to improve until the development of academic surgery as a specialty of medicine, rather than an accessory field. Basic surgical principles for asepsis etc., are known as Halsteads principles
Modern surgery
Modern surgery developed rapidly with the scientific era.
Ambroise Paré (sometimes spelled "Ambrose") pioneered the treatment of gunshot wounds, and the first modern surgeons were battlefield doctors in the
Napoleonic Wars. Naval surgeons were often
barber surgeons, who combined surgery with their main jobs as barbers. Three main developments permitted the transition to modern surgical approaches - control of
bleeding, control of
infection and control of
pain (
anaesthesia).
; Bleeding: Before modern surgical developments, there was a very real threat that a patient would bleed to death before treatment, or during the operation.
Cauterization (fusing a wound closed with extreme heat) was successful but limited - it was destructive, painful and in the long term had very poor outcomes.
Ligatures, or material used to tie off severed blood vessels, originated as early as
ancient Rome, and were improved by
Ambroise Paré in the 16th century. Though this method was a significant improvement over the method of cauterization, it was still dangerous until infection risk was brought under control - at the time of its discovery, the concept of
infection was not fully understood. Finally, early 20th century research into
blood groups allowed the first effective blood transfusions.
; Pain: Modern
pain control through
anesthesia was discovered by two
American dental surgeons, Horace Wells (1815–1848) and
William T. G. Morton. Before the advent of
anesthesia, surgery was a traumatically painful procedure and surgeons were encouraged to be as swift as possible to minimize patient
suffering. This also meant that operations were largely restricted to
amputations and external growth removals. Beginning in the 1840s, surgery began to change dramatically in character with the discovery of effective and practical anaesthetic chemicals such as
ether and
chloroform, later pioneered in Britain by
John Snow. In addition to relieving patient suffering, anaesthesia allowed more intricate operations in the internal regions of the human body. In addition, the discovery of
muscle relaxants such as
curare allowed for safer applications.
; Infection: Unfortunately, the introduction of anesthetics encouraged more surgery, which inadvertently caused more dangerous patient post-operative infections. The concept of infection was unknown until relatively modern times. The first progress in combating infection was made in 1847 by the
Hungarian doctor
Ignaz Semmelweis who noticed that medical students fresh from the dissecting room were causing excess maternal death compared to midwives. Semmelweis, despite ridicule and opposition, introduced compulsory handwashing for everyone entering the maternal wards and was rewarded with a plunge in maternal and fetal deaths, however the
Royal Society in the UK still dismissed his advice. Significant progress came following the work of
Louis Pasteur and his advances in
microbiology, when the British surgeon
Joseph Lister began experimenting with using phenol during surgery to prevent infections. Lister was able to quickly reduce infection rates, a reduction that was further helped by his subsequent introduction of the techniques of
Robert Koch (such as the Steam Steriliser, which proved more successful than the carbolic acid spray that Lister had been using previously) to
sterilize equipment, have rigorous hand washing and a later implementation of rubber gloves. Lister published his work as a series of articles in
The Lancet (March 1867) under the title
Antiseptic Principle of the Practice of Surgery. The work was groundbreaking and laid the foundations for a rapid advance in infection control that saw modern aseptic operating theatres widely used within 50 years (Lister himself went on to make further strides in antisepsis and asepsis throughout his lifetime).
Surgical specialties and sub-specialties
General surgery
*Cardiothoracic surgery
*Colorectal surgery
*Paediatric surgery
*Plastic surgery
*Vascular surgery
*Transplant surgery
*Trauma surgery
*Breast surgery
*Surgical oncology
*Endocrine surgery
*Skin surgery
Otolaryngology
Gynecology
Oral and maxillofacial surgery
Orthopaedic surgery
Neurosurgery
Ophthalmology
Podiatric surgery
Urology
Some other specialties involve some forms of surgical intervention, especially gynaecology. Also, some people consider invasive methods of treatment/diagnosis, such as cardiac catheterization, endoscopy, and placing of chest tubes or central lines "surgery". In most parts of the medical field, this view is not shared.
Patronage
The
patron saints for surgeons are
Saint Luke the Evangelist the physician and disciple of
Christ,
Saints Cosmas and Damian (3rd century physicians from
Syria),
Saint Quentin (3rd century saint from
France),
Saint Foillan (7th century saint from
Ireland), and
Saint Roch (14th century saint from
France).
See also
Anesthesia
ASA physical status classification system or pre-operative physical fitness
Biomaterial
Cardiac surgery
Surgical drain
Endoscopy
Hypnosurgery
Jet ventilation
List of surgical procedures
Minimally invasive procedure
Perioperative mortality
Robotic surgery
Surgical Outcomes Analysis and Research
Surgical Sieve
Trauma surgery
Reconstructive surgery
Governing bodies
American College of Surgeons
American Academy of Orthopedic Surgeons
American College of Foot and Ankle Surgeons
Royal Australasian College of Surgeons
Royal Australasian College of Dental Surgeons
Royal College of Physicians and Surgeons of Canada
Royal College of Surgeons in Ireland
Royal College of Surgeons of Edinburgh
Royal College of Physicians and Surgeons of Glasgow
Royal College of Surgeons of England
Qualifications in the UK and Ireland
Fellowship of the Royal College of Surgeons
Membership of the Royal College of Surgeons
References
External links
Dr Rustom Plastic Surgery Guide - Ask Your Questions
Dr. Cynara Coomer Prepares You for Surgery: Ask the Right Questions
Surgery Videos from the American Medical Videos Journal
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