Download MBBS (Bachelor of Medicine, Bachelor of Surgery) Important Topics Surgery Instruments
Instruments
Document creation: Prithwiraj Maiti
R.G.KAR MEDICAL COLLEGE
BATCH 2015
Email: prithwiraj2009@yahoo.in
Most photos are taken from Surgery Department, RGKMC (some from web)
Reference: Class notes and M.L.Saha
Additional reference: SRB & Bailey and Love
Table of contents
Content
Page no.
Metallic instruments
Parts of a forceps
2
Babcock's tissue holding forceps
2
Allis tissue forceps
3
Straight hemostatic forceps
4
Needle holder
6
Moynihan's cholecystectomy forceps
7
Rampley's swab holding forceps
8
Tooth dissecting forceps
9
Lagenbach's single blade retractor
9
Mayo's towel clip
10
Kelly's rectal speculum (Proctoscope)
11
Non-metallic instruments
Kehr's T tube
12
Corrugated rubber sheet drain
14
Self-retaining Foley's catheter
15
Part 1: Metallic instruments
Parts of a forceps
Babcock's tissue holding forceps
How you identified this instrument?
This is a light instrument
The terminal part of the blades are curved and fenestrated
The tip is provided with a ridge in one blade and groove in the other
When the rachet is closed, the ridge in one blade fits in groove of the other
blade
There are no teeth in the forceps (so it is a non-traumatic instrument).
What is the purpose of using this instrument?
To hold soft tissue (like intestine).
In which surgeries, this instrument is used?
1. Appendicectomy
2. Small and large bowel resection anastomosis
3. Gastrotomy/ jejunostomy
4. Suprapubic cystolithotomy.
In appendicectomy, how many Babcock's tissue forceps are needed?
3 pairs: for holding the appendix at tip, body and base.
How will you sterilize this instrument?
By autoclaving.
Allis tissue forceps
How you identified this instrument?
This is a light instrument
The blades are longer
There is a gap between the blades
The tips of the blades are provided with sharp teeth with grooves in
between
When the rachet is closed, the teeth of the one blade fits in the groove of
the other blade.
Tell some common uses of this instrument?
1. During laparotomy using midline incision:
I. To retract the skin margins by applying this forceps to the skin
margins when linea alba is incised
II. To hold the linea alba by this forceps during suturing the midline
incision.
2. To hold skin margins during incisional hernia to raise skin flaps.
Straight hemostatic forceps
How you identified this instrument?
This is a light instrument
It has 4 parts: finger bows, rachet, a pair of shaft and a pair of blades
The blades are usually half the length of the shaft
The full length of the blades are provided with transverse serrations
The tips are conical and non-toothed
When the rachet is closed, the blades are apposed.
What are the types of hemostatic forceps?
1. Straight
2. Curved.
What is the purpose of using this instrument?
This instrument is used in all operations to hold the bleeding vessels while cutting
through different layers of tissues.
Tell some common uses of this instrument (although it is used in all operations)?
1. While making abdominal incisions and closing abdominal incisions,
hemostatic forceps is used to hold the cut margins of rectus sheath, linea
alba, external oblique aponeurosis and surgical peritoneum.
2. During appendicectomy, it may be used to:
I. Split internal oblique and transversus abdominis
II. To crush the base of appendix.
Can you hold the bowel by this instrument?
No, bowel can't be hold by straight hemostatic forceps because it wil crush the
bowel as bowel is softer tissue. It may be used to hold tougher tissues.
What are the ways of controlling bleeding during surgery?
1. Simple pressure
2. Crushing of the bleeding point
3. Electrocautery
4. Ligature.
How will you sterilize this instrument?
By autoclaving.
Needle holder
How you identified this instrument?
There are criss-cross serrations in the blade.
There is a longitudinal groove in the center of the criss-cross serration
which allows firm gripping of the needle.
How you differentiated this instrument from a straight hemostatic forceps?
Straight hemostatic forceps
Needle holder
Lighter instrument
Relatively heavier instrument
Blades are longer
Blades are smaller
There are transverse serrations in the There are criss-cross serrations in the
blade
blade
There is no groove at the center of
There may be a groove at the center
the blade
of the blade
What is the use of this instrument in surgery?
It is used to hold needle for suturing in all operations.
Moynihan's cholecystectomy forceps
How you identified this instrument?
This is a stout and heavy instrument
There are a pair of relatively long shafts
Blades:
Relatively short
Slightly angled to the shaft
With blunt tips
Having transverse serrations.
How many of this instrument is needed in cholecystectomy?
2?1
How this instrument is used during cholecystectomy?
One pair of forceps is used to hold the fundus of gallbladder
One pair of forceps is used to hold near Hartmann's pouch (neck)
One additional pair of forceps may be used to hold the body of gallbladder
if the gallbladder is long.
How will you sterilize this instrument?
By autoclaving.
Rampley's swab holding forceps
How you identified this instrument?
This is a long instrument
The instrument is provided with a pair of finger bows, a pair of long shaft,
rachet, a joint and a pair of blades
The blades are oval in shape, fenestrated and provided with serrations in
the inner aspect.
Name some common uses of this instrument.
1. Cleansing the skin before all operations with an antiseptic solution
2. To clean the blood with a swab during dissection of Calot's triangle during
cholecystectomy
3. Mopping of deeper tissues during surgery.
Tooth dissecting forceps
How you identified this instrument?
There are 2 shaft with a blade
There is a tooth at the tooth of one blade
There is a groove at the tooth of the other blade
When the blades are approximated, the toothed tip fits into the groove.
How you differentiated it from plain dissecting forceps?
As plain dissecting forceps don't contain tooth.
Tell some common uses of this instrument?
1. Used in almost all operations to hold tough structures like skin, fascia and
aponeurosis
2. To hold cut skin margins during suturing
3. To hold linea alba/ rectus sheath during closure of the abdominal incision.
Lagenbach's single blade retractor
How you identified this instrument?
The instrument has a handle, a long shaft and a flat solid blade
The blade is curved at right angle to the shaft
The tip of the blade is curved at right angle for better retraction of tissue.
What is the use of this instrument?
Suitable placed retractors help in better visualization of the operative field.
Name some other retractors you know.
1. Czerney's retractor
2. Doyne's retractor
3. Morris's retractor.
Mayo's towel clip
How you identified the instrument?
The instrument is provided with a pair of finger bows, a rachet, a pair of
shaft, a joint and a pair of blades
Blade is curved and tip of the blade is sharp and pointed.
Name some common uses of this instrument.
1. Draping of surgical site
2. Catch hold of towel
3. Catch hold of tongue in tongue surgery.
What is draping?
Draping is suitable placement of sheets to isolate the area of operation from the
rest of the body. It reduces contamination of the surgical site from adjacent skin
areas.
Kel y's rectal speculum (Proctoscope)
Describe the instrument.
This is a 3 inch long metallic instrument with a hollow outer sheath where a
handle is attached. The terminal end of the sheath is round/ obliquely cut.
The inner rod is called obturator. Its terminal part is smooth and rounded
and fits well with the outer sheath.
Name some common uses of this instrument.
Diagnostic use:
In the diagnosis of:
1. Piles
2. Perianal fistula
3. Anal/ rectal polyp
4. CA anal canal/ rectum
5. Ulcerative colitis.
Therapeutic use:
1. Injection sclerotherapy of piles
2. Polypectomy
3. Biopsy from a rectal/ anal growth.
Part 2: Non-metallic instruments
Kehr's T tube
How you identified this instrument?
There is a short horizontal limb (which is inserted into the bile duct)
There is a long vertical limb (which is brought outside).
What is the significance of the green line on T tube?
It is made of a radio-opaque substance so that its position can be visualized
radiologically.
Name some common uses of this instrument.
After choledochotomy (CBD exploration), the bile duct us closed over a T-
tube (as primary closure of bile duct is associated with higher incidence of
leakage).
To drain bile duct after repair of bile duct injury (in this case, T tube acts as
a stent and kept in place for 4-6 weeks).
Do you know the dimensions of CBD?
Length of CBD: 6-7 cm.
Caliber of CBD: 6-9 mm.
How T tube is inserted?
The short limb is cut to a desired length
The limb passing towards the lower end of bile
duct is kept about 3-4 cm
The limb passing towards the hepatic duct is
kept about 2-3 cm
A slit is made in the short limb so that 2
openings are connected by the slit
A rim of the tube is cut away along the slit made
The short limb is then inserted into the bile duct
The choledochotomy (incision into CBD) is then
closed with interrupted sutures so that the T
tube fits snugly into the bile duct.
Describe the treatment protocol in brief after placement of a T-tube (after CBD
exploration).
CBD exploration
After 7-10 days postoperative
Do a T tube cholangiogram
Residual stone
No stone
Wait 4 weeks to let the tract be mature
Remove T tube
Employ choledochoscope to remove mature stone
How will you confirm the removal of T tube?
Clamp the T-tube, after 10-14 postoperative days and observe 48 hours for
development of pain, jaundice and fever
Confirm free flow of dye in T-tube cholangiogram.
Name some methods to remove retained CBD stones?
1. ERCP and stone removal in 3 weeks
2. Flushing of heparinized saline/ bile acid through the T-tube
3. Burhenne technique (also asked separately in viva): After 6 weeks once T-
tube track gets matured; using Dormia basket/ choledochoscope, stone is
removed through T-tube track under fluoroscopic guidance.
4. ESWL with endoscopic sphincterotomy/extraction/ lavage/stenting
5. Through percutaneous transhepatic route, cholangioscope is passed and
CBD is visualised, stone is identified and removed using Dormia basket.
How will you sterilize a T tube?
Usually a T tube comes in a pre-sterilized pack. A used T tube may be sterilized
using:
-radiation or
Ethylene oxide.
Corrugated rubber sheet drain
Identify the instrument.
It is a corrugated rubber sheet drain made up of Indian latex rubber impregnated
with radio-opaque substance.
Tell some uses of this instrument.
1. As a drain to drain blood/ pus/ bile following some operations
2. Following cholecystectomy, the drain is placed in subhepatic space and
Hepatorenal pouch of Morrison
3. Following repair of peptic perforation, the drain is placed in Hepatorenal
pouch of Morrison.
Sterilization:
By autoclaving.
Mention the temperature, pressure and time for autoclaving.
Temperature: 121C
Pressure: 15 Pound
Time:
For metallic instruments: 30 min
For non-metallic instruments (Ex: rubber): 15 min.
Self-retaining Foley's catheter
Describe the instrument.
It is a 2 way self-retaining Foley's bal oon catheter.
The side channel is used to inflate the balloon (by distill water) so that it
remains in place (blocked at the neck of bladder).
There is a valve in the side channel.
The main channel is for drainage of urine.
The catheter number (no.14/ no.16) and balloon capacity (30-50 mL) is
mentioned in main/ side channel.
Mention some of the common uses of this instrument.
1. For relief of retention of urine by urethral catheterization
2. Suprapubic cystostomy
3. Tube nephrostomy
4. Urethral catheterization following urethroplasty/ open prostatectomy.
Mention some other unusual uses of Foley's catheter.
1. Feeding jejunostomy
2. Drainage of abscess cavity
3. Control of epistaxis.
This post was last modified on 01 September 2021